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首页> 外文期刊>電子情報通信学会技術研究報告. 無線通信システム. Radio Communication Systems >Performance of DS-CDMA RAKE receivers which employ adaptive weight control technique in frequency selective fading channel
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Performance of DS-CDMA RAKE receivers which employ adaptive weight control technique in frequency selective fading channel

机译:在频率选择性衰落信道中采用自适应加权控制技术的DS-CDMA RAKE接收机的性能

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摘要

In mobile DS-CDMA Systems, frequency selective fading degrades quality of received signal. One of the techniques to reduce the degradation of signal quality is that of the EAKE receivers which employ adaptive weight control technique in order to be adapted to the characteristics change of channel. In this paper, the WMSA (Weight Multi-slot Averaging) method is used for channel estimation, and the DFE (Decision Feedback Equalizer) is used for the equalization processing of received signal. A wideband propagation model is used to simulate as mobile radio environments. The results of computer simulation show that degradation of error performance is mainly due to the signal level depression which occurred by fading, and the average BER can be improved with the increase of number of pilot symbols.
机译:在移动DS-CDMA系统中,频率选择性衰落降低了接收信号的质量。减少信号质量下降的技术之一是采用自适应权重控制技术以适应信道特性变化的EAKE接收机。在本文中,WMSA(加权多时隙平均)方法用于信道估计,DFE(决策反馈均衡器)用于接收信号的均衡处理。宽带传播模型用于模拟移动无线电环境。计算机仿真结果表明,差错性能的下降主要是由于衰落引起的信号电平下降所致,随着导频符号数目的增加,平均误码率可以得到改善。

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