非理想功率控制下超宽带系统多用户性能分析  

Performance analysis of multiuser UWB systems under imperfect power control

作　　者：林迪[1] 吴宣利[1] 沙学军[1] 

机构地区：[1]哈尔滨工业大学,通信技术研究所,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2009年第5期21-25,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金重点资助项目(60432040);新世纪优秀人才支持计划资助项目(NECT-04-0332)

摘　　要：针对超宽带系统中现有的技术及硬件水平难于实现理想的功率控制,使系统的误码性能下降的问题,提出一种非理想功率控制下超宽带系统的多用户模型,得到系统的平均误码率,并同理想功率控制系统之间的平均误码性能进行了比较.结果表明:随着信道衰减系数、用户数和数据传输速率的增加,两者之间的差距逐渐变大.在各种参数条件下,用户传输速率的上限都随着系统用户数的增大而减小,而且减小的速率越来越慢.In ultra-wideband （UWB） system, it is difficult to realize the ideal power control by using existing hardwires, which degrades the performance of UWB systems . Thus a model for the analysis on the performance of UWB system under imperfect power control is proposed, and the average bit error rate （BER） of the UWB systems is obtained. Moreover, the average BER under imperfect and perfect power control is compared. Results show that the difference between these two systems concerning the average of probability error increases with the increase of the transmission attenuation, the number of users as well as the transmission data rate. For each system parameter, the upper bound of transmission data rate decreases with the increasing number of users, and the decreasing rate gets lower and lower.

关 键 词：超宽带 多用户干扰 非理想功率控制 系统模型 

分 类 号：TN915[电子电信—通信与信息系统]