基于功率谱线模型的脉冲UWB系统干扰分析  

Study of the Spectrum Tone Interference Model of Pulse-Based UWB System

作　　者：吴常国[1] 姬国庆[1] 姜光兴[1] 朱洪波[1] 

机构地区：[1]南京邮电大学无线通信与电磁兼容实验室,南京210003

出　　处：《微波学报》2008年第2期62-66,共5页Journal of Microwaves

基　　金：国家自然科学基金重点项目(No.60432040);教育部博士点基金(200509230031)

摘　　要：在脉冲调制TH-PPM UWB(跳时-脉位调制超宽带无线通信系统)频谱分析的基础上研究了UWB系统对于传统窄带接收机带内干扰的分析模型。与传统的分析方法不同,本文将UWB系统对于窄带接收机的带内干扰等效为带内的白噪声干扰和离散多音干扰,生动的反映出UWB频域的连续和离散部分对窄带系统的干扰。同时,基于相关接收理论,进一步分析了M-PAM调制方式下接收机的平均符号错误概率。通过大量的仿真分析,可以得到一个重要的结论:随着带内离散干扰功率的增加,UWB对窄带接收机的影响越来越近似为等效高斯噪声。Based on the TH-PPM UWB（Time Hopping-Pulse Position Modulation Ultra Wide Band） spectrum analysis, this paper presented a new interference model to evaluate the effect of the pulse-based UWB interfernce to the narrowband system. Unlike the conventional methods, the proposed approach makes the interference to be equivalent to the white noise and multi-tone part in band, which vividly shows the interference characteristic. In addition, based on the correlation theory, this paper calculated the M-ary PAM receiver Average Symbol Error Rate. From the mass simulation results, an importan conclusion can be drawn that the Symbol Error Rate increased as the number of the tones increased and the perfermance is more close to the situation under only Guassian Noise interference.

关 键 词：超宽带无线通信系统 M进制-脉冲幅度调制(M—PAM) 多音干扰 符号差错概率 

分 类 号：TN925[电子电信—通信与信息系统]