基于MMSE权重估计的超宽带加权ATR接收机性能分析  

Performance analysis of a ultra-wideband weighted ATR receiver based on MMSE weight estimation

作　　者：杨刚[1] 亢洁[2] 

机构地区：[1]西安邮电学院通信与信息工程学院,陕西西安710061 [2]陕西科技大学电气与信息工程学院,陕西西安710021

出　　处：《电路与系统学报》2010年第4期129-132,共4页Journal of Circuits and Systems

摘　　要：根据UWB接收信号的多径区段分布特点,采用分段加权合并的思想和最小均方误差(MMSE)估计理论,提出了一种新的超宽带加权ATR接收机。各区段有不同权重,对多径分量分布密集区段给予更大的权重,权重系数由MMSE估计得出,从而大大降低了噪声乘积项对接收性能的影响。经过理论分析和IEEE CM3多径信道仿真,结果表明该接收机的误码率性能优于一般ATR接收机。Considering the multipath sub-sections distribution feature of a UWB received signal and using the idea of dividing-weighting-combining and Minimize-Mean-Square-Error（MMSE） estimation theory,a new Ultra-Wideband weighted ATR receiver is presented.The receiver gives the sub-sections different weights（i.e.the sub-section which holds the dense multipath signals the bigger weight factor）,so the influence caused by noise-on-noise term in performance is highly suppressed.The weight factors are obtained by using MMSE estimation.This receiver is analyzed in theory and simulated in IEEE CM3 multipath channel.The results show that it has a better bit-error-ratio performance compared with a conventional ATR receiver.

关 键 词：超宽带通信 发射参考接收机 MMSE权重估计 

分 类 号：TN914.3[电子电信—通信与信息系统]