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  Subjects -> ELECTRONICS (Total: 184 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 6)
Advances in Electronics     Open Access   (Followers: 79)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 33)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 319)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 36)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 8)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 270)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 106)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 86)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 93)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 51)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access  
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 198)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 97)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 77)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 46)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 67)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 70)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 56)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 20)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 40)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 70)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 46)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 58)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 25)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 14)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 12)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 24)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 10)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 25)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 170)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 9)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 10)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 29)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 19)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 33)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal  
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 54)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 75)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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Similar Journals
Journal Cover
Aerospace and Electronic Systems, IEEE Transactions on
Journal Prestige (SJR): 0.611
Citation Impact (citeScore): 3
Number of Followers: 319  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0018-9251
Published by IEEE Homepage  [191 journals]
  • IEEE Aerospace and Electronic Systems Society
    • Abstract: Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  •  Guest Editorial
    • Authors: Shannon D. Blunt;Raviraj Adve;Daniel W. Bliss;James Curran;Sumit Roy;
      Pages: 1060 - 1061
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Sequential Sensor Selection and Access Decision for Spectrum Sharing
    • Authors: Jihyun Lee;Eylem Ekici;
      Pages: 1062 - 1074
      Abstract: We develop an algorithm for sequential sensor selection and channel access decision in cognitive radio (CR) networks under shadowing with the objective of maximizing total number of correct decisions on channel availability over finite time periods. The problem is formulated as a multiarmed bandit (MAB) problem and our index-based heuristic algorithms is shown to achieve sublinear accumulated regret in time period $T$. We also evaluate the performance of the proposed algorithms with numerical examples.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Spatial Spectrum Sharing for Satellite and Terrestrial Communication
           Networks
    • Authors: Chi Zhang;Chunxiao Jiang;Linling Kuang;Jin Jin;Yuanzhi He;Zhu Han;
      Pages: 1075 - 1089
      Abstract: With the increasing demands on frequency resources, spectrum sharing between the satellite and terrestrial systems becomes prominent, especially when it comes to the millimeter wave (mmWave) bands. In this paper, we propose a general spectrum sharing framework in satellite and terrestrial networks, through analyzing the interference caused by terrestrial cellular systems and nongeostationary (NGEO) systems to geostationary (GEO) systems, respectively, both in the downlink and uplink. Specially, in the spectrum sharing between terrestrial and GEO systems, two scenarios are analyzed. In the first scenario, we consider each base station (BS) equipped with one omnidirectional antenna, and in the second scenario the beamforming scheme is employed at the BSs. In light of the parameters recommended by the standards and recent results presented in the literatures on the mmWave channel model, we calculate the protection area where no cognitive users (terrestrial system or NGEO system) could transmit. The definition of protection area is to guarantee an outage performance for the GEO system. Outside the protection area, the cognitive transmitters may transmit concurrently with GEO systems. Simulations are conducted to verify the effectiveness of the proposed schemes.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Avoidance of Time-Varying Radio Frequency Interference With
           Software-Defined Cognitive Radar
    • Authors: Benjamin H. Kirk;Ram M. Narayanan;Kyle A. Gallagher;Anthony F. Martone;Kelly D. Sherbondy;
      Pages: 1090 - 1107
      Abstract: Congestion in the RF spectrum is rapidly increasing, which has motivated the need for efficient spectrum sharing techniques. A cognitive radar system has been developed to implement a perception action cycle, for spectrum sharing, in which the RF spectrum is sensed, other RF signals are identified, and the radar frequency band of operation is adapted to avoid interfering signals in the spectrum. The system operates in real time and is capable of coexisting with common communications signals. A system with this capability requires efficient programming that pushes the limits of the technology available. In order to properly test the performance of a radar system designed for this kind of reactive spectrum sharing, a rigorous set of synthetic interference signals is generated and several informative evaluation metrics are defined. Additionally, the system's performance is evaluated with common communications signals such as LTE and GSM. The performance of the system is found to be adequate for avoiding signals that are either varying in frequency or turning on and off at rates on the order of 10 ms.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • New Spectrum Efficient Reconfigurable Filtered-OFDM Based L-Band Digital
           Aeronautical Communication System
    • Authors: Niharika Agrawal;Sumit J. Darak;Faouzi Bader;
      Pages: 1108 - 1122
      Abstract: To meet an ever-increasing demand of the spectrum for aeronautical communication, we propose new L-band digital aeronautical communication system using reconfigurable filtered orthogonal frequency division multiplexing. The proposed protocol enables transceivers to dynamically adapt the transmission bandwidth over a wide range to meet the desired quality of service, and high out-of-band attenuation leads to significant improvement in the vacant spectrum utilization. We support our claims via simulation and complexity comparison results for various realistic channel conditions.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Optimal Linear Detection of Signals in Cyclostationary, Linearly
           Modulated, Digital Communications Interference
    • Authors: David P. Zilz;Mark R. Bell;
      Pages: 1123 - 1145
      Abstract: Both economic incentives and policy trends motivate the study of spectrum sharing between radar and wireless communications as a means to mitigate spectrum scarcity. This paper proposes a novel, temporal signal processing algorithm for a radar to mitigate interference from cyclostationary, linearly modulated digital communications (LMDC) interference such as orthogonal frequency division multiplexing (OFDM) or code division multiple access (CDMA). The proposed algorithm has the form of a novel whitening filter followed by a matched filter, and as such it optimizes the statistical deflection among the class of all linear detection filters. The derived cyclostationary whitening filter has equivalent mathematical representations as: 1) the form of a multiuser detector followed by an interference canceler, and 2) a frequency-shift (FRESH) filter. Performance results indicate that the derived cyclostationary whitener can produce signal-to-interference-plus-noise ratio (SINR) improvements ranging from negligible to up to $text{20 dB}$ for the parameters used in this study. The cyclostationary whitener leads to the greatest SINR improvements when the interference-plus-noise is dominated by only a few LMDC signals, such as might occur in a near-far scenario.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Mitigating Linear-Frequency-Modulated Pulsed Radar Interference to OFDM
    • Authors: Matt Carrick;Jeffrey H. Reed;Chad M. Spooner;
      Pages: 1146 - 1159
      Abstract: This paper presents a novel filter for mitigating the interference of pulsed chirp radar signals to orthogonal frequency-division multiplexing (OFDM) signals, reducing the size of exclusion zones or dependence on spectrum access systems. The method exploits the spectral redundancies in OFDM and radar signals using a time-varying frequency shift filter. The simulated results show the performance improvement in both the bit error rate and the signal-to-interference-and-noise ratio.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Novel Radar Waveform Optimization for a Cooperative Radar-Communications
           System
    • Authors: Alex Rajan Chiriyath;Shankarachary Ragi;Hans D. Mittelmann;Daniel W. Bliss;
      Pages: 1160 - 1173
      Abstract: We develop and present a novel minimum estimation error variance waveform design method. The method optimizes the spectral shape of a unimodular radar waveform such that the performance of a joint radar-communications system that shares spectrum is maximized. We also develop the novel spectral water-filling successive interference cancelation data rate, which employs the continuous spectral water-filling algorithm to obtain the optimal communications power spectrum. We perform a numerical study to compare the performance of the new technique with the previously derived spectral mask shaping method. The global estimation rate and the data rate capture the radar and the communications performance, respectively.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Efficient Algorithms for Synthesizing Probing Waveforms With Desired
           Spectral Shapes
    • Authors: Bo Tang;Junli Liang;
      Pages: 1174 - 1189
      Abstract: We consider the design of constant-modulus probing waveforms to improve the spectral compatibility of radar systems with the congested radio frequency environments. We seek to synthesize radar probing waveforms with desired spectral shapes. We use a weighted least-squares fitting approach to formulate the spectral shaping problem. We introduce two algorithms to tackle the optimization problem we encounter. Both algorithms are devised based on cyclic approaches and have guaranteed convergence of the objective values. Moreover, the proposed algorithms can be implemented via fast Fourier transforms and, hence, are computationally efficient. Furthermore, we extend the proposed algorithms to deal with peak-to-average-power ratio and similarity constraints, which are desirable in some radar applications. Finally, we provide several numerical examples to demonstrate the effectiveness of the proposed algorithms.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Joint Radar Amplifier Circuit and Waveform Optimization for Ambiguity
           Function, Power-Added Efficiency, and Spectral Compliance
    • Authors: Casey Latham;Austin Egbert;Charles Baylis;Lawrence Cohen;Robert J. Marks;
      Pages: 1190 - 1199
      Abstract: Future radar transmitters must be adaptive and reconfigurable in real time to be able to share spectrum dynamically with wireless communications. We demonstrate the joint, back-and-forth optimization of the radar transmitter waveform and circuitry in a combined algorithm that can be used for real-time reconfiguration. While previously developed methods consider the waveform and circuit separately, resulting in emphasis on one of the criteria [ambiguity function (AF) or power efficiency], we show that the joint optimization of the circuit and waveform allows both the radar AF and circuit power-added efficiency (PAE) criteria to be gradually improved during the optimization. Measurement results are presented and analyzed to assess the convergence of the PAE and AF least-squares error, as compared to the AF template during an optimization under spectral mask and peak-to-average power ratio constraints.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Study of the Target Self-Interference in a Low-Complexity OFDM-Based Radar
           Receiver
    • Authors: Steven Mercier;Damien Roque;Stéphanie Bidon;
      Pages: 1200 - 1212
      Abstract: This paper investigates a radar-communications waveform sharing scenario. Particularly, it addresses the self-interference phenomenon induced by independent single-point scatterers throughout a low-complexity monostatic orthogonal frequency-division multiplexing (OFDM)-based radar receiver from a statistical viewpoint. Accordingly, an analytical expression of the postprocessing signal-to-interference-plus-noise-ratio is derived and detection performance is quantified in simulated scenarios for rectangular and nonrectangular pulses. Both metrics suggest that this phenomenon must be further handled.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Dual-Function MIMO Radar Communications System Design Via Sparse Array
           Optimization
    • Authors: Xiangrong Wang;Aboulnasr Hassanien;Moeness G. Amin;
      Pages: 1213 - 1226
      Abstract: Spectrum congestion and competition over frequency bandwidth could be alleviated by deploying dual-function radar-communications systems, where the radar platform presents itself as a system of opportunity to secondary communication functions. In this paper, we propose a new technique for communication information embedding into the emission of multiple-input multiple-output (MIMO) radar using sparse antenna array configurations. The phases induced by antenna displacements in a sensor array are unique, which makes array configuration feasible for symbol embedding. We also exploit the fact that in a MIMO radar system, the association of independent waveforms with the transmit antennas can change over different pulse repetition periods without impacting the radar functionality. We show that by reconfiguring sparse transmit array through antenna selection and reordering waveform-antenna pairing, a data rate of megabits per second can be achieved for a moderate number of transmit antennas. To counteract practical implementation issues, we propose a regularized antenna-selection-based signaling scheme. The possible data rate is analyzed and the symbol/bit error rates are derived. Simulation examples are provided for performance evaluations and to demonstrate the effectiveness of proposed dual-function radar-communication techniques.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Joint Radar-Communications Co-Use Waveform Design Using Optimized Phase
           Perturbation
    • Authors: Shenghua Zhou;Xueling Liang;Yao Yu;Hongwei Liu;
      Pages: 1227 - 1240
      Abstract: Joint radar-communications dual function has drawn lots of attention since it can make a better use of the scarce wireless frequency resources and expensive hardware platforms. In case of joint radar-communications signal co-use, many communication sequences have poor range sidelobes and thus are not very suitable for the radar function. In this paper, we present a single carrier joint radar-communications method operating in the pulsed radar mode. Digital communication sequences are first partitioned into blocks which are then mapped to digital phase-coded sequences, like binary phase-shift keying (BPSK) and quadrature phase-shift keying (QPSK) sequences. The phases of the digital sequences are perturbed a bit such that certain degrees of freedom are available to optimize for lower range sidelobes. Insignificant phase perturbation will be deemed as phase noise by a communication receiver and then phase codes can be correctly decoded; in radar-processing channels, range compression are performed with known and optimized phase perturbation such that low-range sidelobes are obtained. An implementation scheme is presented. Numerical results with BPSK and QPSK sequences indicate that little phase perturbation can significantly drop the range sidelobe level but will insignificantly rise the bit error rate.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • A mmWave Automotive Joint Radar-Communications System
    • Authors: Sayed Hossein Dokhanchi;Bhavani Shankar Mysore;Kumar Vijay Mishra;Björn Ottersten;
      Pages: 1241 - 1260
      Abstract: We propose a millimeter-wave joint radar-communications (JRC) system comprising a bi-static automotive radar and vehicle-to-vehicle communications. We study the applicability of known phase-modulated-continuous-wave (PMCW) and orthogonal-frequency-division-multiple-access waveforms for bi-static-JRC. In both cases, we design multiplexing strategies to ensure the parameter identifiability, derive JRC statistical bounds and numerically demonstrate superior performance of proposed low-complexity JRC super-resolution algorithms over conventional two-dimensional fast Fourier transform/MUltiple SIgnal Classification.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • High-SNR Channel Capacity for Communication Over Radar Waveforms
    • Authors: Ian Weiner;
      Pages: 1261 - 1268
      Abstract: We apply recent theory in the high-SNR estimation of channel capacity to study how much information may be encoded in radar pulse waveforms. Waveforms are constrained to those which admit a high-gain, low-sidelobe pulse compression filter. Using simple numerical methods, we compute the high-SNR capacity of a Gaussian channel using such a waveform alphabet. The resulting tradeoff curves indicate a notably favorable theoretical tradeoff space between signal processing performance and high-SNR channel capacity.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Loading Factor Estimation Under Affine Constraints on the Covariance
           Eigenvalues With Application to Radar Target Detection
    • Authors: Antonio De Maio;Luca Pallotta;Jian Li;Petre Stoica;
      Pages: 1269 - 1283
      Abstract: Maximum likelihood (ML) estimation of the loading factor under affine constraints on the covariance eigenvalues is addressed. Several situations of practical interest for radar are considered, and the corresponding ML solutions to the loading factor estimation problem are derived in closed form. Furthermore, it is shown that the constrained ML problem, the constrained geometric approach, and the constrained problem of mean square error minimization (with respect to the loading factor) all lead to the same solution. At the analysis stage, the effectiveness of the resulting covariance estimators is evaluated in terms of both the signal-to-interference-plus-noise ratio and the receiving beampattern shape and compared with that of other covariance estimation methods available in the literature. Finally, a receiving architecture based on the adaptive matched filter that exploits the new loaded covariance estimators is also considered to assess the benefits of the new strategies in terms of detection probability.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • High-Precision Modeling for Aerospace TT&C Channels Using Piecewise
           Osculating Interpolation
    • Authors: Shaozhong Lu;Yongqing Wang;Yuyao Shen;
      Pages: 1284 - 1300
      Abstract: Polynomial interpolation is widely used in channel modeling for aerospace tracking, telemetry, and command channel simulators, to accurately regenerate the satellite motion parameters with a high sampling rate from the available low sampling rate motion data. In this paper, a novel piecewise osculating interpolation approach is proposed to improve modeling precision. It uses the available distance and its higher-order derivatives at each pair of adjacent knots to construct the piecewise interpolation polynomial, thus achieving a better precision and continuity of the resulting motion parameters. Moreover, it is efficiently implemented with an interpolation filter based on a modified Farrow structure, and the designed filter can interpolate the motion data obtained both through uniform or nonuniform sampling. Additionally, a sampling optimization algorithm is proposed. It optimizes the motion data sampling by minimizing the maximum interpolation error given the average sampling interval and interpolation polynomial order, and therefore, improves the precision further without increasing the costs. The validity of the proposed approach is verified by numerical simulation, and its advantages are demonstrated by comparison with existing methods.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Interleaved Radar Pulse Scheduling for Multitarget Tracking With Multiple
           Simultaneous Receive Beams
    • Authors: Dae-Sung Jang;Han-Lim Choi;
      Pages: 1301 - 1318
      Abstract: This paper addresses interleaved pulse scheduling in multitarget tracking with a pulse Doppler phased array radar that can process multiple simultaneous receive beams (MSRB), using element or subarray level digital beamforming (DBF) architectures. Key constraints in this pulse scheduling such as consistent selection of pulse repetition frequency in an interleaved group of pulses are identified; the scheduling problems of both DBF levels are then formulated as an integer program that minimizes the total tracking time under these constraints. The formulation particularly takes into account the relief of nonoverlapping constraints on received beams by the MSRB processing, which facilitates pulse interleaving with reduced overall track occupancy. While the integer program formulation applies to both levels of beamforming architectures, an additional selection problem, termed disk selection, is presented for the subarray level beamforming case in order to consider a geometric limitation on the directions of received beams in digital postprocessing, called resteering. Heuristic algorithms for the interleaved pulse scheduling problems, which are shown to be NP-hard, are presented to produce feasible solutions in a computationally tractable manner. The practicality of the algorithms, in terms of performance and computation time, is validated by a complexity analysis and numerical simulations.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • The Impact of Optical Beam Position Estimation on the Probability of Error
           in Free-Space Optical Communications
    • Authors: Muhammad Salman Bashir;Mark R. Bell;
      Pages: 1319 - 1333
      Abstract: Optical beam position on a detector array is an important parameter that is needed to optimally detect a pulse position modulation (PPM) symbol in free-space optical communications. Since this parameter is generally unknown, it is essential to estimate the beam position as accurately as possible. In this paper, we examine that an accurate estimate of the beam position is required in order to minimize the probability of PPM symbol detection error. Furthermore, we employ different estimators/trackers of the beam position (which could be stationary or time-varying), and compare the probability of error performance of the detectors using those estimators. The probability of error is calculated with the help of Monte Carlo simulations for the uncoded 8-PPM and 16-PPM systems, each of which employ photon counting maximum likelihood receivers. It is found out that the probability of error is minimum for the maximum likelihood estimate of the stationary beam position. Moreover, for the dynamically varying beam position, a particle filter with a sufficiently large number of particles provides a close-to-optimal probability of error performance.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Uncertain Timestamps in Linear State Estimation
    • Authors: Clas Veibäck;Gustaf Hendeby;Fredrik Gustafsson;
      Pages: 1334 - 1346
      Abstract: We consider a linear state estimation problem, where, in addition to the usual timestamped measurements, observations with uncertain timestamps are available. Such observations could, e.g., come from traces left by a target in a tracking scenario or from witnesses of an event and have the potential to improve the estimation accuracy significantly. We derive the posterior distribution and point estimators for a linear Gaussian smoothing formulation of this problem and illustrate with two numerical examples.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Oba Filter for Online-Adaptive Nonlinear State Estimation With
           Interference
    • Authors: Kerİm Demİrbaş;
      Pages: 1347 - 1356
      Abstract: Interference, such as jamming, is widely encountered in practical applications, such as target tracking. Kalman-based nonlinear filters may not be feasible for nonlinear state estimation with nonlinearly transformed interference. This paper presents an online-based adaptive (oba) filter, which we have named the oba filter (OF), for state filtering and prediction of nonlinear discrete dynamic models with estimate constraints, nonlinearly transformed interference and noise. In the OF, noises and interference are approximated by discrete noises and interference; states are quantized; some undesired state estimates, which are not in near vicinities of the actual state values, are detected by a confidence level, and then state quantization levels are updated at the times when undesired estimates occur by using the measurement model; and states are recursively estimated by a suboptimal implementation of multiple composite hypothesis testing. The OF can prevent some undesired state estimates and outperform the unscented Kalman, regularized, sampling importance resampling (SIR), and auxiliary SIR particle filters for some nonlinear models with noise and interference. It is also suitable for state estimation with either missing observations or estimate constraints.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Separating Function Estimation Test for Binary Distributed Radar Detection
           With Unknown Parameters
    • Authors: Ali Ghobadzadeh;Raviraj S. Adve;
      Pages: 1357 - 1369
      Abstract: This paper addresses the problem of distributed detection in the case where, under the signal-present hypothesis, the signal-to-noise ratio (SNR) is unknown and/or observations are correlated. We assume that each local detector makes a (binary) decision while meeting a local false alarm constraint; it then transmits its decision to a fusion center. The unknown SNR at each local detector induces an unknown probability of detection and, hence, the optimal detector at the fusion center does not exist. We begin with the case most often considered in the literature: independent observations. In this case, we derive the asymptotically optimal separating function estimation test (AOSFET) and the generalized likelihood ratio test (GLRT). Moreover, we propose a method to set the local false alarm rates to achieve the maximum probability of detection at the fusion center (while meeting a constraint on the global probability of false alarm). The second part of this paper considers the case of correlated observations. We show that the AOSFET for this problem does not exist. As alternatives, we propose three suboptimal SFETs: based on an approximation to the AOSFET, the Kullback–Leibler divergence, and the Euclidean distance of the estimated probability mass function (pmf) of the observations under each hypotheses. Finally, we propose two methods to improve the performance of the estimation of the pmfs using a library of training labeled data based on the maximum likelihood estimation and expected maximization methods.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Multichannel Signal Detection Based on Wald Test in Subspace Interference
           and Gaussian Noise
    • Authors: Weijian Liu;Jun Liu;Hai Li;Qinglei Du;Yong-Liang Wang;
      Pages: 1370 - 1381
      Abstract: This paper investigates the problem of detecting a multichannel signal embedded in subspace interference and Gaussian noise. The interference lies in a known subspace but with unknown coordinates, while the noise, in the general sense, consisting of thermal noise and clutter, has an unknown covariance matrix. To estimate the covariance matrix, it is assumed that there are sufficient signal-free training data. Two cases are considered, namely, the homogeneous environment (HE) and partially HE (PHE). The test and training data in the HE have the same noise covariance matrix, while the test and training data in the PHE share the same noise covariance matrix up to an unknown scaling factor. We derive the corresponding Wald tests both in the HE and PHE. Remarkably, these two detectors reject the clutter by using the sample covariance matrix, and then reject interference and integrate signal simultaneously through the oblique projection. Numerical examples show that the two proposed detectors can provide better detection performance than existing detectors in some situations.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Optimal Impact Angle Guidance for Exoatmospheric Interception Utilizing
           Gravitational Effect
    • Authors: Shaoming He;Chang-Hun Lee;
      Pages: 1382 - 1392
      Abstract: This paper aims to develop a new optimal intercept angle guidance law for exoatmospheric interception by utilizing gravity. A finite-time optimal regulation problem is formulated by considering the instantaneous zero-effort-miss and the intercept angle error as the system states. The analytical guidance command is then derived based on Schwarz's inequality approach and Lagrange multiplier concept. Capturability analysis using instantaneous linear time-invariant system concept is also presented to provide better insights of the proposed guidance law. Theoretical analysis reveals that the proposed optimal guidance law encompasses previously suggested optimal impact angle constrained guidance laws. Numerical simulations with some comparisons clearly demonstrate the effectiveness of the proposed guidance law.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Designing Unimodular Sequence With Low Peak of Sidelobe Level of Local
           Ambiguity Function
    • Authors: Yang Jing;Junli Liang;Bo Tang;Jian Li;
      Pages: 1393 - 1406
      Abstract: This paper considers the problem of designing unimodular sequence with low peak of sidelobe level of local ambiguity function. The optimization problem is difficult because of the mixed nonconvex unimodulus and highly nonlinear fourth-order polynomial-like constraints. To solve the problem, we propose a hybrid lagrange programming neural network-alternating direction method of multipliers (LPNN-ADMM) approach. To separately deal with the complex nonconvex and nonlinear constraints, we introduce auxiliary variables to transfer the fourth-order polynomials from the nonlinear constraints into the Lagrange function. As a result, the original optimization variables and auxiliary variables are updated alternately in the ADMM framework. Especially, the original optimization variables are updated from the newly formed nonlinear objective function together with the unimodular constraints via the LPNN method, in which an adaptive selection scheme of the penalty parameter is developed to minimize the corresponding Lagrange function while satisfying the constraints. The performance of the proposed method is demonstrated via numerical examples.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Effect of Asymmetric Control Constraints on Fixed-Wing UAV Trajectories
    • Authors: Sulakshan R. Arya;Sachit Rao;Bhagavatula Dattaguru;
      Pages: 1407 - 1419
      Abstract: Reference trajectories, for the longitudinal states of a fixed-wing unmanned aerial vehicle subjected to asymmetric control constraints, are distinguished using the characteristics of regions of asymptotic stability calculated as ellipsoidal domains by solving linear matrix inequalities. These domains are used to determine the maximum allowable deviations from the reference, for which stable closed-loop tracking can be ensured. Constraints are imposed on a linear state feedback controller with the saturation modeled as a sector nonlinearity.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Imaging for a Forward Scanning Automotive Synthetic Aperture Radar
    • Authors: Shahzad Gishkori;Liam Daniel;Marina Gashinova;Bernard Mulgrew;
      Pages: 1420 - 1434
      Abstract: In this paper, we propose a forward scanning synthetic aperture radar methodology for a forward-looking automotive (low-terahertz) radar, which combines scene scanning with synthetic aperture processing, resulting in enhanced angular resolution and improved imaging. We propose two algorithms, first, a modified back-projection (BP) algorithm and, second, a compressed sensing-based BP algorithm. We suggest techniques to reduce computational complexity of the proposed algorithms. Results of simulation and real-data experiments corroborate the validity of our proposed methodology and algorithms.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Soft-Decision-Based Distributed Detection With Correlated Sensing Channels
    • Authors: Hadi Kasasbeh;Lei Cao;Ramanarayanan Viswanathan;
      Pages: 1435 - 1449
      Abstract: Prior works on distributed detection with correlated Gaussian observations primarily dealt with single-bit reports to the fusion center and suboptimal fusion rules. Considering multiple bits and independent reporting channel errors, we formulate the optimal detection problem as a nonlinear integer programming problem for which the genetic algorithm is applied to find a suboptimal solution. The Bayesian probability of error performance of our suboptimal solution, first, for one-bit, is better than the performance of some previously proposed schemes and, second, for multiple bits, approaches that of the centralized detection scheme.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • A Novel Weighted Mismatched Filter for Reducing Range Sidelobes
    • Authors: Yinghao Sun;Quanhua Liu;Jinjian Cai;Teng Long;
      Pages: 1450 - 1460
      Abstract: Pulse compression, usually achieved using a matched filter, is extensively applied in radar/sonar systems. This process improves the signal-to-noise ratio (SNR) of the received signal without increasing the peak transmitted power. However, it is often desirable to accept a slight penalty in the target SNR in order to suppress the range sidelobes. In this paper, a novel weighted mismatched filter (WMMF) that can reduce range sidelobes to the designed level over specified regions is proposed. Two algorithms are provided to calculate the WMMF in different situations. A novel performance metric, the mean sidelobe level over a specified region, is also proposed to demonstrate the performance of the proposed method. Then, the SNR loss is deduced and analyzed based on several experiments. Finally, simulations and experiments based on real measured data are conducted to illustrate the effectiveness of this method. The theoretical evaluation and experiments show that the proposed WMMF can be used for all types of waveforms based on pulse compression processing and can flexibly and effectively suppress range sidelobes. Moreover, the mainlobe and the SNR loss can also be controlled by the proposed algorithms. In addition, this method can be easily applied to existing radar systems without modifying the radar transmitter or receiver.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Collective Unambiguous Positioning With High-Order BOC Signals
    • Authors: José Antonio García-Molina;Juan Antonio Fernández-Rubio;
      Pages: 1461 - 1473
      Abstract: The unambiguous estimation of high-order binary offset carrier signals in harsh propagation conditions is still an open problem in the literature. This paper proposes to overcome the limitations observed in state-of-the-art unambiguous estimation techniques based on the application of existing direct positioning techniques and the exploitation of the spatial diversity introduced by arrays of antennas. In particular, the ambiguity problem is solved as a multiple-input multiple-output estimation problem in the position domain.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Weighted Two-Dimensional Root MUSIC for Joint Angle-Doppler Estimation
           With MIMO Radar
    • Authors: Jihye Lee;Jaehyun Park;Joohwan Chun;
      Pages: 1474 - 1482
      Abstract: For jointly estimating angle-Doppler information, two-dimen-sional multiple signal classification (MUSIC) is often applied, which requires an exhaustive grid search over angle-Doppler domain. To mitigate the computational complexity and enhance the estimation performance, we modify two-dimensional MUSIC in three steps. First, instead of using two-dimensional spectral search, it is converted to two consecutive polynomial root-finding problems. Second, the degree of the polynomial in the first root-finding stage is undesirably high in general; hence, we approximate it to a lower order polynomial through discrete Fourier transform. Finally, further enhancement can be achieved by having the closest approximation of null-spectrum function by assigning unequal weight coefficients. Cramer–Rao bound is derived for joint angle-Doppler estimation as a benchmark in our performance analysis.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Three-Dimensional Path-Following Backstepping Control for an Underactuated
           Stratospheric Airship
    • Authors: Zongyu Zuo;Lin Cheng;Xinxin Wang;Kangwen Sun;
      Pages: 1483 - 1497
      Abstract: In this paper, a three-dimensional (3-D) path-following control design for an underactuated stratospheric airship is proposed based on the parameterized path description. The desired attitude, velocity, and the path parameter updating law are obtained by employing the guidance-based path-following principle. The resultant system possesses a cascaded structure, which consists of a guidance loop, an attitude stabilization loop, and a velocity tracking loop. The stability analysis shows that the path-following error and all states of the closed-loop system are ultimately uniformly bounded. Simulation results demonstrate the effectiveness of the proposed controller.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Multisensor Sequential Change Detection With Unknown Change Propagation
           Pattern
    • Authors: Mehmet Necip Kurt;Xiaodong Wang;
      Pages: 1498 - 1518
      Abstract: Detecting changes with multiple sensors has received significant attention in the literature. In many practical applications such as critical infrastructure monitoring and modeling of disease spread, a useful change propagation model is one where change eventually happens at all sensors, but where not all sensors witness change at the same time-instant. While the known change propagation dynamics was studied before, this paper studies a more general setting of unknown change propagation pattern (trajectory) in both centralized and decentralized settings with the goal of detecting the first time-instant any sensor witnesses a change. Using the dynamic programming framework, the optimal solution structures are derived and in the special rare-change regime, several more practical solutions are proposed. Under certain conditions, the first-order asymptotic optimality of a proposed algorithm called multichart test is shown as the false alarm probability vanishes. Moreover, low-complexity solutions are proposed based on online estimation of the change propagation pattern. Numerical studies illustrate that the proposed detectors offer near-optimal performance. Furthermore, in the decentralized setting, the level-crossing sampling is proposed for sampling and transmission of local statistics that significantly improves the detection performance using the same amount of communication resources compared to the conventional uniform-in-time sampling.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Neural Network-Based Adaptive Sliding Mode Control for Gyroelastic Body
    • Authors: Shiyuan Jia;Jinjun Shan;
      Pages: 1519 - 1527
      Abstract: Gyroelastic body refers to a flexible structure with a cluster of angular momentum devices. The torques exerted by the angular momentum devices can be used for active vibration suppression. This paper addresses the vibration suppression of gyroelastic body in the presence of uncertainties and external disturbances. Considering that the modal variables of the gyroelastic body cannot be measured directly. Therefore, a neural network (NN) based adaptive modal observer is designed to estimate the modal information of the gyroelastic body. Based on the modal observer, a NN-based adaptive sliding mode output feedback controller (NNASMOFC) is designed. The stabilities of the NN-based modal observer and the NNASMOFC are proved using Lyapunov theory. The possible spillover problem is considered by optimal actuator placement. Simulation results demonstrate the effectiveness of the proposed controller and observer.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Information-Theoretic Waveform Design for Gaussian Mixture Radar Target
           Profiling
    • Authors: Yujie Gu;Nathan A. Goodman;
      Pages: 1528 - 1536
      Abstract: An information-theoretic waveform design is proposed for Gaussian mixture radar target profiling by maximizing the mutual information between the measurements and the target signal. During gradient optimization, a bandwidth constraint is enforced by introducing a frequency-domain masking operator. Simulations demonstrate the effectiveness of the proposed waveform design on target profiling.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Accurate ISAR Scaling for Both Smooth and Maneuvering Targets
    • Authors: Sun Sibo;Zhang Xinyu;Zhang Guangpu;Liang Guolong;Zhao Chunhui;
      Pages: 1537 - 1549
      Abstract: Inverse synthetic aperture radar (ISAR) scaling can give the scatterers’ absolute coordinate, which is the premise of ascertaining the target's size and recognizing the target. In this paper, we present an accurate ISAR scaling method. First, the signal characteristic in cross-range dimension is analyzed, and the problem of ascertaining the rotational velocity (RV) is converted to the estimation of the chirp rates. Second, to estimate the chirp rates, the integral Lv's distribution and the ordinary least-squares Lv's distribution are proposed for smooth targets and maneuvering targets, respectively. Utilizing the signal characteristic, the proposed algorithms achieve a higher precision and a lower computational burden compared with existing algorithms. Finally, the weighted ordinary least squares is introduced to calculate the RV from the estimated chirp rates for both smooth and maneuvering targets. Simulation and real data experiment validate the effectiveness of the proposed methods.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Measurement and Characterization of Power Lines of Aircraft Flight Test
           Instrumentation
    • Authors: Ândrei Camponogara;Thiago R. Oliveira;Renato Machado;Weiler A. Finamore;Moisés V. Ribeiro;
      Pages: 1550 - 1560
      Abstract: This paper presents a statistical characterization of power lines used by the flight test instrumentation of a corporate jet as a medium for data communication purposes. We quantify the main parameters that drive the design of power line communication technologies at the physical layer. We show that the limit of $-$83.01 dBm/Hz on the power spectral density (1.7–86 MHz), imposed by the standard RTCA/DO160, results in data rates as high as 90 Mb/s.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Time-Frequency Jammer Mitigation Based on Kalman Filter for GNSS Receivers
    • Authors: Pai Wang;Yongqing Wang;Ediz Cetin;Andrew G. Dempster;Siliang Wu;
      Pages: 1561 - 1567
      Abstract: In this paper, a time-frequency (TF) jammer mitigation algorithm based on a Kalman filter is proposed for global navigation satellite system (GNSS) receivers. A new state-space representation of the received signal is formed considering the rapidly changing characteristics of the jamming signal. Using the instantaneous frequency (IF) and chirp rate estimates obtained by the TF analysis, the proposed algorithm applies a Kalman filter for jamming signal estimation. The estimated jamming signal is then subtracted from the received data to remove the jammer signal. To cope with the time-varying accuracy in the jammer parameter estimates, the methods for adaptively adjusting the process and measurement noise variances using chirp rate estimates are described. Simulations are performed to verify the effectiveness of the proposed method for mitigating various types of jammers. The proposed approach improves the jammer signal removal performance by minimizing the effect of the Kalman filter model mismatch when compared to other techniques reported in the literature.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Robust Beamforming Design for Sum Secrecy Rate Maximization in Multibeam
           Satellite Systems
    • Authors: Weixin Lu;Kang An;Tao Liang;
      Pages: 1568 - 1572
      Abstract: This letter investigates the secure transmission optimization in a multibeam satellite downlink network with multiple eavesdroppers, where each legitimate user is wiretapped by a corresponding eavesdropper. Our design objective is to maximize the sum secrecy rate of the multibeam satellite network in the presence of imperfect channel state information (CSI) of eavesdroppers, while guaranteeing the total transmit power constraint on-board the satellite. Due to the nonconvexity and intractability resulting from the eavesdroppers’ CSI uncertainty, a robust beamforming scheme is proposed to transform the initial optimization problem into a convex framework by jointly applying the Taylor expansion, S-Procedure, and Cauchy–Schwarz inequality. Meanwhile, an iterative algorithm is introduced to obtain the optimal solution. Finally, the validity and superiority of the proposed scheme are confirmed through comparisons with the existing nonrobust and perfect CSI approaches.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Mitigation of Secondary Arcing in Spacecraft Electronic Equipment
    • Authors: Alexander V. Batrakov;Sergey B. Suntsov;Sergey A. Popov;Anton V. Schneider;Elena L. Dubrovskaya;Alexander V. Seloustev;Alexander A. Hvalko;
      Pages: 1573 - 1576
      Abstract: Here we present experimental data that demonstrate the possibility to detect defects in protective dielectrics covering printed circuit boards (PCBs) and to prevent secondary arcing after primary arc events. The detection of defects in a PCB is based on its plasma scanning and measurements of plasma-to-PCB electron currents through defects, allowing one to identify even their hidden forms. Once all defects are detected and healed, the PCB shows its proper operation in a plasma environment.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Technical Areas and Editors: AESS IEEE Aerospace & Electronic Systems
           Society
    • Pages: 1577 - 1581
      Abstract: Presents a listing of AESS technical areas and editors.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
  • Information for Authors
    • Pages: 1582 - 1583
      Abstract: These instructions give guidelines for preparing papers for this publication. Presents information for authors publishing in this journal.
      PubDate: June 2019
      Issue No: Vol. 55, No. 3 (2019)
       
 
 
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