一種新的基于特征向量合并的超寬帶系統(tǒng)分集方案
A Novel Based on Eigenvector Combine Transmission Diversity Scheme for Ultra-wideband Communication System
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摘要: 針對超寬帶系統(tǒng)在室內(nèi)環(huán)境中面臨嚴(yán)重的多徑衰落問題，通常在接收端需使用RAKE接收機(jī)來收集多徑能量改善性能。該文提出了一種新的分集方案，在發(fā)送端信號進(jìn)行預(yù)處理，在接收端使用RAKE合并收集多徑能量，同時給出了基于信道矩陣特征值估計(jì)的最佳合并權(quán)重和時延參數(shù)估計(jì)算法。理論分析和仿真結(jié)果都表明，該算法得到的輸出信噪比總是大于傳統(tǒng)的RAKE接收機(jī)輸出信噪比。
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關(guān)鍵詞:
- 無線通信;超寬帶;預(yù)RAKE;特征值;瑞利熵
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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