Simulation and evaluation of convolution encoder for different noisy channel over wireless communication network in CDMA environment
Journal Title: International Journal of Advanced Research in Computer Engineering & Technology(IJARCET) - Year 2013, Vol 2, Issue 2
Abstract
In this paper we simulate and evaluate the performance of physical layer of wireless communication system of CDMA-2000 specification using radio configuration-3 under forward fundamental channel 1x in terms of bit error rate (BER) by using convolution code. We modeled and evaluated convolution encoder at different rates ½,1/3,1/4 using constraint length k of 3,4,5,6,7,8,9,10 values, under different noise channels (AWGN, BSC, Rayleigh. Rician, combination of AWGN and Rayleigh, combination of AWGN and Rician channel). On the basis of better simulated results of convolution encoder at rate ¼ and higher constraint length in all noise channel, we simulated rate ¼ convolution encoder with constraint length (k) 9 and structure [775 631 413 471] in CDMA-2000 physical layer. With these parameter of convolution encoder we simulated CDMA-2000 system under AWGN (at different Eb/No and trace back depth) and Rayleigh channel (at different Doppler shift) and Rician channel (at comparable results of Rayleigh channel). We had shown the BER performance of CDMA-2000 physical layer performance at higher rate of convolution encoder in AWGN channel and advantage of Rayleigh channel over Rician channel. This also gives an idea of contribution of trace back depth of viterbi decoder in BER performance
Authors and Affiliations
Jai Kumar, , Mrs. Anita Suman
Keywords
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