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Journal Cover International Journal of Research in Computer and Communication Technology
  [4 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2320-5156 - ISSN (Online) 2278-5841
   Published by Suryansh Publications Homepage  [2 journals]
  • Tone Reservation Technique Based Clipping and Filtering Method for PAPR
           Reduction by Scaling Residual noise

    • Authors: Siva Prasad Valluri, Prashant K Shah
      Abstract: OFDM is an extinguishlyused next-generation wireless transmission technique because of its easy equalization. OFDM can send over hundreds of parallel data streams via multiple carriers which makes the possibility of large data transfer. OFDM has two major drawbacks namely inter-symbol interference (ISI) problem and peak-to-average power ratio (PAPR). Coherent addition of independently modulated carriers, of an OFDM signal can give a large peak-to-average power ratio .Among those PAPR reduction methods, Clipping method is the most simplest method to use . However, using Clipping causes both in-band distortion and out-of-band distortion which are undesirable but this can be reduce by using filtering after Clipping. Another Possibility of PAPR reduction can be reserving several tones to generate a peak-cancelling signal (PCS).However, this method suffers from high computational complexity. To address this problem, this paper proposes a simple algorithm using residual noise reduction which is left after clipping and Filtering to satisfy tone reservation (TR) constraints and scaling with a scaling factor determined to minimize the out-of-range power generates the PCS. Our Simulations show a significant reduction in PAPR and Error rates.
      PubDate: 2016-05-01
      Issue No: Vol. 5 (2016)
  • An optimized MAC unit using S-MB recoding scheme and compressors

    • Authors: Rony Roy Philip, Jilu George
      Abstract: In this paper, we demonstrate a MAC unit using 8 bit Booth multiplier and addition operation. Most of DSP applications uses addition and multiplication unit for faster operation. This arithmetic unit mainly multiplication operation determines the speed of overall design. Here we propose a new recoding scheme named Sum- to modified booth (S-MB) algorithm scheme along with 4:2 compressor which eliminates CSA and CLA adders which are used for partial product addition during multiplication operation. Here we use fused multiply- accumulate (MAC) unit which further reduces the overall area, obtain high throughput than conventional methods.
      PubDate: 2016-05-01
      Issue No: Vol. 5 (2016)
  • New Software Testing Methodologies for Regulation Needs

    • Authors: N. Sudheer, Vidhushi Sharma
      Abstract: Software Testing is modifying activity different software engineering projects, especially for large security models. The new tests cases can uses some hundred to several thousands. It significant computing locations and lengthy execution times Software testing is finding errors, and maintenance overall software costs. The software development and testing methodologies, tools, and techniques have emerged over the last few decades promising to change software quality. We take a new prioritization model which prioritizes test cases in descending order for Component Based Software Development (CBSD) in the concept of Prim’s algorithm. Our main aim is to solve and take the model in test case prioritization algorithm take CIG (Component interaction Graph) as input for a medium/ large size CBSD (Component Based Software Development Process) in real-time system as an example and to generate prioritized test cases in descending order. We have used genetic algorithm to change the test case and applying conditional in source code. Test case data is generated automatically using genetic algorithm is change and output performs is generated by random testing.
      PubDate: 2016-04-27
      Issue No: Vol. 5 (2016)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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