双循环相关复倒谱的多用户盲信道辨识方法
Blind Multiuser Channel Identification Based on Cyclic Complex Cepstrum
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摘要: 该文针对多用户系统提出了一种新颖的盲辨识方法.它利用了调制引入的循环平稳性,可以识别出不同的用户不同的传感器(天线)各自的传输信道.利用循环复倒谱的方法可以给出信道的估计,方法简单明了,与现有的方法相比有一定的优势,适合于多用户上行链路信道.文中还给出了信道可辨识性的条件和证明,提出了辨识算法,并对算法进行了模拟.
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关键词:
- 信道辨识;循环二阶统计量;循环复倒谱
Abstract: In this paper, a novel approach is presented for the multiuser channel identification. The approach makes use of the modulation-induced cyclostationarity and its capable of identifing individual channels of different users. By measns of the complex cepstrum of cyclic autocorrelaton, the blind estimation of the channelcan be achieved. The appraoch is rather simple, with considerable advantages. The identifiability condition and its proof are also concluded in the paper. Finally, the simulaton of identification algorithm demonstrates its convergence. -
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