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首页> 外文期刊>IEEE Transactions on Communications >Coding for a coherent DS-CDMA system employing an MMSE receiver in a Rayleigh fading channel
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Coding for a coherent DS-CDMA system employing an MMSE receiver in a Rayleigh fading channel

机译：在瑞利衰落信道中采用MMSE接收机的相干DS-CDMA系统的编码

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摘要

This paper analyzes the performance of a convolutionally coded code-division multiple-access system, which employs a linear, minimum mean-square error (MMSE) receiver for interference suppression. A flat, Rayleigh fading channel is considered, where convolutional encoding and interleaving are employed in order to combat the effects of the fading. Theoretical results are derived for the average bit-error probability of the MMSE receiver, where the optimum tap weights for the adaptive filter are determined by the solution of the Wiener-Hopf equations. Simulation results showing the average bit-error rate of the MMSE receiver are also presented, which incorporate the effects of recursive least squares adaptation, channel estimation using pilot symbol-assisted modulation, and finite interleaving. Results show that the MMSE receiver with coding can provide a substantial gain over the matched-filter receiver in a rapidly varying, Rayleigh fading channel. The results also reiterate the fact that lower rate codes are not necessarily the best choice when used with the MMSE receiver.
机译：本文分析了卷积编码码分多址系统的性能，该系统采用线性最小均方误差（MMSE）接收器进行干扰抑制。考虑了平坦的瑞利衰落信道，其中使用了卷积编码和交织以对抗衰落的影响。从MMSE接收器的平均误码率得出理论结果，其中自适应滤波器的最佳抽头权重由Wiener-Hopf方程的解确定。仿真结果还显示了MMSE接收器的平均误码率，其中包括了递归最小二乘自适应，使用导频符号辅助调制的信道估计以及有限交织的效果。结果表明，在快速变化的瑞利衰落信道中，经过编码的MMSE接收机比匹配滤波器接收机具有更大的增益。结果还重申了一个事实，即与MMSE接收机一起使用时，低码率代码不一定是最佳选择。

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