一种新的基于特征向量合并的超宽带系统分集方案
A Novel Based on Eigenvector Combine Transmission Diversity Scheme for Ultra-wideband Communication System
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摘要: 针对超宽带系统在室内环境中面临严重的多径衰落问题，通常在接收端需使用RAKE接收机来收集多径能量改善性能。该文提出了一种新的分集方案，在发送端信号进行预处理，在接收端使用RAKE合并收集多径能量，同时给出了基于信道矩阵特征值估计的最佳合并权重和时延参数估计算法。理论分析和仿真结果都表明，该算法得到的输出信噪比总是大于传统的RAKE接收机输出信噪比。Abstract: Ultra-WideBand (UWB) signal faced badly multi-path fading in indoor environment, RAKE receiver usually is adopted to gather multi-path energy and improve performance. A new diversity scheme is proposed in this paper, which implemented pretreatment in transmitter and RAKE combine in receiver respectively, and then a based on channel matrix eigen-value SVD algorithm is presented to estimated optimal parameter of delay time and combine weight. Both theoretic analysis and simulation show, the algorithm always gains maximized output SNR than conventional RAKE receiver.
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