一种新的DS-UWB多用户接收机  

A novel multiuser receiver for DS-UWB systems

作　　者：林丽莉[1,2] 

机构地区：[1]浙江工商大学信息与电子工程系,浙江杭州310035 [2]浙江省综合信息网技术重点实验室,浙江杭州310027

出　　处：《浙江大学学报（理学版）》2009年第4期408-411,415,共5页Journal of Zhejiang University（Science Edition）

基　　金：浙江省教育厅科研计划资助项目(20070627);浙江工商大学青年人才基金资助项目(1120XJ130713);浙江省综合信息网技术重点实验室开放课题资助(200810)

摘　　要：随着超宽带(UWB)技术的发展与繁荣,UWB系统的多址接入问题已成为一个新的研究热点.因为多用户检测可以增加多址UWB通信系统的容量,所以本文提出一种适用于DS-UWB系统的混合多用户接收机.该接收机将作者提出的改进遗传算法(IGA)与并行干扰消除(PIC)多用户接收机相结合,可进一步消除多用户干扰,提供更好的检测性能.改进的遗传算法基于Hamming球形解空间的概念,采用一种简单而有效的种群初始化方法,可更充分地利用输入染色体携带的信息.仿真结果表明,本文提出的多用户接收机具有更好的检测性能和抗远近干扰能力.With the development and prosperity of ultra wideband （UWB） technology, the multiple access UWB system has been a hot research topic. Multiuser detection technique has the potential to enlarge the system capacity in multiple access UWB communication environments. A new hybrid multiuser receiver is proposed for DS-UWB system. To implement the hybrid receiver, the improved genetic algorithm （IGA） proposed by the author is incorporated with the parallel interference cancellation （PIC） detector to further eliminate the multiuser interference, and better detection performance is provided. The IGA has faster convergence performance, and it adopts a simple but effective population initialization method based on the concept of Hamming sphere solution space, which can make full use of the information delivered by the input chromosome. Simulation results show the proposed new hybrid multiuser receiver possesses better detection performance and near-far resistant ability.

关 键 词：多用户检测 超宽带 并行干扰消除 遗传算法 

分 类 号：TN914.53[电子电信—通信与信息系统]