BER of OFDM system using concatenated forward error correcting codes (FEC) over Nakagami – m fading channel

BER of OFDM system using concatenated forward error correcting codes (FEC) over Nakagami – m fading channel

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2013 by IJETT Journal
Volume-4 Issue-9                      
Year of Publication : 2013
Authors : Mr.Firoz Ahmed Mansuri , Prof. Saurabh Gaur

Citation 

Mr.Firoz Ahmed Mansuri , Prof. Saurabh Gaur. "BER of OFDM system using concatenated forward error correcting codes (FEC) over Nakagami – m fading channel". International Journal of Engineering Trends and Technology (IJETT). V4(9):4138-4142 Sep 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.

Abstract

In this paper, we present an efficient technique for the BER of audio signal in OFDM system, using concatenated forward error correcting (FEC) code namely convolution code and reed Solomon code, over Nakagami – m fading channels In FEC concatenated channel coding , the OFDM system uses Reed - Solomon (RS) encoder of (255,239,8), with Convolution encoder of ? and ¾ - rated codes under QPSK digital modulation. The simulation study is made with the development of a computer program written in MATLAB source code on the processing of recorded audio signal under additive Nakagami – m fading channels. The simulation results of estimated Bit error rate (BER) show that the implementation of concatenated RS(255,239,8) code with Convolutional code under QPSK modulation techni que gives better results in terms of Bit error rate (BER) as compared to only Convolutional code under QPSK modulation

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Keywords
Orthogonal Frequency Division Multiplexing ( OFDM) , Reed - Solomon coding, Convolution coding (CC), FEC, Fading distribution, Nakagami - m channel.