Performance Improvement of OFDM System Using Iterative Signal Clipping With Various Window Techniques for PAPR Reduction

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2013 by IJETT Journal
Volume-4 Issue-9                      
Year of Publication : 2013
Authors : Smita Jolania , Sandeep Toshniwal


Smita Jolania , Sandeep Toshniwal. "Performance Improvement of OFDM System Using Iterative Signal Clipping With Various Window Techniques for PAPR Reduction". International Journal of Engineering Trends and Technology (IJETT). V4(9):4248-4252 Sep 2013. ISSN:2231-5381. published by seventh sense research group.


OFDM signals demonstrates high fluctuations termed as Peak to Average Power Ratio (PAPR).The problem of OFDM is the frequent occurrence of high Peaks in the time domain signal which in turn reduces the efficiency of transmit high power amplifier. In this paper we discussed clipping and filtering technique which is easy to implement and reduces the amount of PAPR by clipping the peak of the maximum power signal.This technique clips the OFDM signal to a predefined threshold and uses a filter to eliminate the out - of - band radiation.Moreover, analysis of PAPR is given by varying different filters. The study is focused to reduce PAPR by iterative clipping and filtering method. The symbol error rate performances for different modulation techniques have been countered.Each clipping noise sample is multiplied by a window function(e.g.Hanning,Kaiser, or Hamming) to suppress the out - of - band noise. It is shown that clipping and different filtering techniques for improvement in the SER performance and provides further redu ction in PAPR.


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PAPR,Clipping,window function.