一种自适应直扩超宽带(DS-UWB)接收机在高速无线室内传输环境中的性能  

Performance of an Adaptive DS-UWB Receiver in High-Speed Wireless Indoor Transmission Environments

作　　者：梁中华[1] 朱世华[1] 王绍鹏[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《电子与信息学报》2006年第3期424-428,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60372055)国家"863"计划(2003AA123320)博士点基金(20020698024;20030698027)资助课题

摘　　要：该文提出了一种基于可变长训练序列的自适应直扩超宽带(DS-UWB)接收机。该接收机充分利用自适应 NLMS算法在收敛性、复杂度及稳定性方面的综合优势,以较小的训练开销实现了自适应接收机的功能。理论分析及计算机仿真实验表明,在误码性能相当的前提下,所提出的自适应接收机比传统的Rake接收机具有更为简单的结构,同时与现有的自适应接收机相比,其训练序列的开销可节省60％以上,因而适用于低功率、低成本以及简易实用的室内超宽带应用场合。An adaptive receiver scheme employing the training sequences of flexible length is proposed for DS-UWB systems. By fully exploiting the NLMS algorithm＇s robust behavior on convergence rate, complexity and stability, the proposed scheme is capable of performing an adaptive receiver with its low cost in terms of training bits, Theoretical analysis and simulation results show that, without loss of the BER performance, the proposed scheme can achieve a simpler structure compared with the traditional coherent Rake receiver and a higher throughput compared with the conventional adaptive receiver scheme, and therefore can be considered as a promising candidate for low cost, low power consumption and low complexity indoor UWB application scenarios.

关 键 词：无线通信 超宽带(UWB) 密集多径 自适应 

分 类 号：TN914.53[电子电信—通信与信息系统]