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ReserarchID
59X52
Crossref Journal DOI 10.17406/gjre
Print ISSN 0975-5861
e-ISSN 2249-4596
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In this paper we investigate the impact of using different block interleaving techniques with different equalizers for a digital communication system which uses MQAM (M=16) modulation technique to transmit information over Rayleigh faded AWGN channel in an outdoor environment. Interleaving technique which are considered here are Algebraic interleaver, Random interleaver, Matrix interleaver and Helical scan interleaver. Performance is analyzed in terms of bit error rate by MATLAB simulation. The different property values that is path delay, average path gain, maximum Doppler shifts, Doppler spectrum parameters etc are chosen carefully for the simulation of Rayleigh fading channel to show a realistic fading channel. Stepsize, forget factor etc for different adaptive algorithms used by decision feedback equalizer (DFE), linear equalizer (LE) are also chosen properly. All the analysis shows the use of interleaving technique increases the performance of communication system. Algebraic and Random interleaver have shown better performance for this considered communication system. Maximum likelihood sequence estimate (MLSE) equalizer provides best equalization for limiting signal dispersion and ISI.
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