多径多用户环境下超宽带脉冲无线通信系统性能  

PERFORMANCE OF ULTRA-WIDEBAND IMPULSE RADIO WIRELESS COMMUNICATION SYSTEM IN MULTIPATH AND MULTIUSER ENVIRONMENTS

作　　者：黎海涛[1] 张靖[2] 陆建华[1] 

机构地区：[1]清华大学电子工程系,北京100084 [2]中国电子科技集团电子科学研究院系统工程总体部,北京100041

出　　处：《电子与信息学报》2003年第11期1564-1569,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(资助号:60132010)

摘　　要：超宽带脉冲无线电是正在发展中的新型高速无线接入技术。该文首先分析了超宽带发射信号实现多址通信的原理。为了研究在多径环境下的系统性能,引入了确定型两径和统计型S-V两种典型室内信道模型。通过仿真试验得到在此信道条件下系统的误比特率。结果表明,在多径多用户环境下,符号间干扰和多址干扰使系统性能下降;当接入用户数达到一定值后,多址干扰成为降低系统性能的主要因素;采用接收天线分集能提高系统性能。Ultra-wideband impulse radio is a developing high speed wireless access technology. In this paper, the principle of ultra-wideband multiaccess communication is analyzed with the transmitting signal. In order to study the system performance in mulitpath channels, the deterministic two-path model and the statistical S-V model are employed for evaluating the bit error rates of the system by simulation. The results indicate that the intersymbol interference and multiple access interference are the main factors that degrade the system performance, which, on the other hand, may be improved by antenna diversity.

关 键 词：超宽带 多径信道 分集 多址干扰 符号间干扰 无线通信 

分 类 号：TN92[电子电信—通信与信息系统]