超宽带数字RAKE接收机多径合成权系数分析  

The Weights Design of the Rake Combiner for UWB Digital Rake Receiver

作　　者：赵树立[1] 郑继禹[1] 林基明[1] 

机构地区：[1]桂林电子工业学院通信与信息工程系,广西桂林541004

出　　处：《桂林电子工业学院学报》2005年第3期11-15,共5页Journal of Guilin Institute of Electronic Technology

摘　　要：根据超宽带信道密集多径的特点,分析了RAKE接收机捕获多径能量中噪声的相关性,并由此给出了RAKE合成权系数选取的改进最大比(WSMR)方案。采用IEEE802.15UWB标准信道模型CM1～CM4,对接收机采用最大比(MR)、最小均方误差(MMSE)及提议WSMR合并系数选取的误码性能进行了仿真和对比,结果表明了WSMR合并方案在CM1～CM2信道下与MMSE方式有相同的性能,在CM3～CM4信道下比MR合并性能更优越,验证了提议的WSMR权系数选取的可行性,说明权系数的选取受信道环境变化所影响。<Abstrcat> We first investigate the correlation of the noise in the captured multi-path energy, and then propose a wide sense Maximal ratio (WSMR) algorithm to determine the weights of the Rake combiner in a dense multi-path indoor UWB channel. WSMR method is compared with MR, MMSE methods under channels generated by the IEEE802.15 channel model CM1～CM4. Simulation results show that the proposed WSMR Rake with MMSE equalizer has the same performance as MMSE Rake receiver in CM1 and CM2 channels, and is superior to the MR in all examined channels. Simulations consist with the theoretical analysis and verify the usefulness of the WSMR algorithm for UWB Rake receiver designing.

关 键 词：超宽(UWB) RAKE 广义的最大比合成(WSMR) 信号检测 

分 类 号：TN911.23[电子电信—通信与信息系统]