BER SIMULATION STUDY FOR A FEC ENCODED DS-CDMA WIRELESS COMMUNICATION SYSTEM WITH IMPLEMENTATION OF ALAMOUTI DIVERSITY SCHEME

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Published Oct 30, 2018
DOI https://doi.org/10.5281/ijrset.v3i2.77

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Aurangzib Md Abdur Rahman
Associate Prof, Department of Information and Communication Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh.
Foez Ahmed
Assistant Prof,Department of Information and Communication Engineering,University of Rajshahi,Rajshahi 6205

Abstract

Multipath fading encountered in time-varying channel renders wireless communications highly non-reliable. To obtain an average bit-error rate of 10-3 using BPSK modulation with coherent detection, performance degradation due to Rayleigh fading can account for a SNR of 10dB higher than that in AWGN. This
paper evaluates the performance of a FEC encoded DS-CDMA based wireless communication system with varying the order of QAM and PSK modulations. Two
transmit antennas and one receiving antenna mounted scheme over an AWGN and Rayleigh fading channels was used for this study. The simulation was done by our developed computer program written in MATLAB source code. The BER results show that the MISO scheme supported DS- CDMA system provides satisfactory performance in retrieving transmitted messages through hostile fading channel environment with the implementation of BPSK digital modulation technique. System performance degrades while increasing the order of digital modulations. 

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Issue
Vol 3 No 2 (2016): Volume 3 Issue 2
Section
Articles