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相关瑞利衰落下的2D-RAKE接收机

[摘要]
本文针对单蜂窝直扩码分多址(DS-CDMA)通信系统,研究了在相关瑞利衰落下使输出信号与干扰加噪声功率比(SINR)最大的2D-RAKE接收机,推导出误比特率(BER)的解析表示式,证明了只要具有足够大的信噪比(SNR)和适当的权值矢量,这种接收机也能获得独立多径信号所能贡献的最大空时分集增益,其用户容量增益也远优于普通的RAKE或多天线接收机,且更适于宽带CDMA系统的应用.
[英文摘要]
In the correlated Rayleigh fading channel,the BER of a 2D-RAKE receiver with maximum SINR is investigated for a single-cell coherent DS-CDMA system.The 2D-RAKE receiver,with high SNR and appropriate 2D-weighting vectors,could achieve the maximal 2D-diversity gain from the completely independent multipath components.Numerical results indicate that, compared to the conventional RAKE or the multi-antenna receiver,the 2D-RAKE receiver promises a substantially additional growth of user capacity and is more suitable to the application of wideband CDMA systems.
[关键词]
DS-CDMA;2D-RAKE接收机;相关瑞利衰落
[作者]
姚彦 龚克 王京 方敏
[作者单位]
微波与数字通信国家重点实验室,清华大学电子工程系
[刊名]
电子学报
[英文刊名]
[期刊类别]
无线电电子学与电信技术
[年 卷 期]
1999   27   0

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