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窄带干扰影响下超宽带系统接收性能分析

发表时间:2008-05-31  浏览量:2225  下载量:1039
全部作者: 齐丽娜,朱洪波
作者单位: 南京邮电大学通信与信息工程学院
摘 要: 超宽带系统信号功率很低,并且占用很宽的频段,系统需要与其他窄带系统共存。因此,在进行系统设计时,必须考虑窄带干扰信号对超宽带系统性能的影响。本文采用特征函数的方法精确分析了多径信道环境下,存在CDMA信号干扰时直接序列超宽带系统的性能,推导得到系统的误码率公式;最后,在基于IEEE 802.15.3a推荐的多径信道环境下进行系统仿真和数值分析。结果表明,本文的精确分析方法得到的系统性能与仿真结果基本吻合,能够较准确地估计系统在存在CDMA窄带信号干扰时的性能。
关 键 词: 无线通信;直接序列超宽带;码分多址;窄带干扰;Rake接收机
Title: Performance of ultra wideband systems in the presence of the narrow band interference
Author: QI Lina, ZHU Hongbo
Organization: College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications
Abstract: The low transmission power and the large bandwidth used, enable an UWB system to co-exist with other narrow band systems. The narrow band interference to UWB systems must be considered when DS-UWB systems are designed. In this paper, the method with characteristic function is presented for precisely calculating the bit-error probability of the DS-UWB systems in the presence of CDMA interference in a multi-path environment. In the end, the simulation tests and numerical analysis are carried out based on the IEEE 802.15.3a channel model. The results show that the characteristic function method is accurate for predicting the BER performance of the UWB systems in the presence of CDMA interference.
Key words: wireless communications; directed sequence spread spectrum ultra wide band(DS-UWB); code division multiple access(CDMA); narrow band interference(NBI); Rake receiver
发表期数: 2008年9月第10期
引用格式: 齐丽娜,朱洪波. 窄带干扰影响下超宽带系统接收性能分析[J]. 中国科技论文在线精品论文,2008,1(10):1152-1157.
 
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