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COMPARISON OF BER BETWEEN UNCODED SIGNAL AND CODED SIGNAL (USING CONVOLUTION CODE) OVER SLOW RAYLEIGH FADING CHANNEL

Fading problem is a major impairment of the wireless communication channel. To mitigate the fading problem and to have reliable communications in wireless channel, channel coding technique is often employed. In this paper the BER (Bit Error Rate) performances is shown from analytically and by means of simulation for Rayleigh fading multipath channels. Here the convolution code is used as a channel coding technique. The performance of convolution encoded binary phase shift keying (coded BPSK) with coherent detection and Viterbi decoding is investigated. Obviously the performance of coded signal in terms of BER is better than uncoded signal and in this research; the main focus is to investigate how much improvements of BER is occurred using convolution code with BPSK for Rayleigh fading channel. The simulation results are shown here graphically.