文章基本信息

标题：Simulation and evaluation of convolution encoder for different noisy channel over wireless communication network in CDMA environment
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作者：Jai Kumar ; Anita Suman
期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2013
卷号：2
期号：2
页码：767-772
出版社：Shri Pannalal Research Institute of Technolgy
摘要：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 . and higher constraint length in all noise channel, we simulated rate . 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.
关键词：AWGN; BSC; BER; CDMA-2000 standard; ; Convolution code; Doppler shift; Multipath fading channel; ; Radio configuration-3; Trace-back depth