PERFORMANCE IMPROVEMENT OF BER BASED ON MULTIPATH FORWARD ERROR CORRECTION DIVERSITY IN WIRELESS COMMUNICATION CHANNELS

AHMAD BAHEEJ  AL-KHALIL

doi:10.26682/sjuod.2020.23.1.17

AHMAD BAHEEJ AL-KHALIL Dept.of Computer Science, College ofScience, University of Duhok, KurdistanRegion, Iraq

DOI: https://doi.org/10.26682/sjuod.2020.23.1.17

Keywords: FEC, Diversity, BER, Multipath, CWMC, MIMO, V-BLAST, Rayleigh, AWGN.

Abstract

The multipath phenomenon is a major factor that is continually affected negatively the performance of wireless communication systems. Since the receiver gets different copies of the transmitted signal from various paths at different times. Consequently, destructive or constructive interference can occur. Therefore, the performance of wireless communication systems is poor in term of bit error rate. This phenomenon can be taken as an advantage if the multiple – input – multiple – output antenna systems are employed at both transmitter and receiver sides (antenna diversity) to improve the bit error rate performance. This paper focuses on the combination of multipath forward error correction diversity technique with vertical-Bell laboratories layered space-time coding. This will lead to enhance the bit error rate in wireless communication systems. The proposed system used Rayleigh and additive white Gaussian noise as two different channel models. The multipath forward error correction diversity technique treats the multipath propagated signals as unessential copies, to utilise them to enhance the bit error rate limitation in the multiple – input – multiple – output systems. The simulation results showed that the performance of the proposed system can be gradually improved by increasing the number of utilised multipath signals in the multipath forward error correction diversity technique.

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