通道间群时延对TDRSS误码性能影响的仿真与分析  

Simulation and analysis of the influence of multi-channel group delay distortion on the performance of TDRSS

作　　者：章仁飞[1] 刘煜[2] 谭晓衡[2] 

机构地区：[1]中国电子科技集团公司第38研究所,安徽合肥230031 [2]重庆大学通信与测控中心,重庆400030

出　　处：《重庆邮电大学学报（自然科学版）》2011年第1期32-37,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市自然科学基金(021400243030)~~

摘　　要：跟踪与数据中继卫星系统(tracking and data relay satellite system,TDRSS)中,通道间群时延失真是影响TDRSS地面数字多波束形成性能的一个重要因素。首先介绍了群时延的概念和表达式,以及TDRSS信道的群时延失真数学模型,然后根据最小相位系统的系数和复倒谱系数之间的关系,设计了满足仿真要求的线性群时延滤波器,在MATLAB/SIMULINK仿真软件包中建立了多路群时延失真信道模型,针对QPSK信号在多路群时延失真信道特性下的误码性能进行仿真和分析。仿真结果表明,当最大群时延失真分布情况相同时,通道数对TDRSS误码率性能的影响并不显著。Group delay distortion between channels is an important factor which affects the ground multi-beam formation of tracking and data relay satellite system （TDRSS）. The basic concept and expressions of group delay and satellite group delay channel model are first introduced, and then a liner group delay filter is designed based on the relationship between the group delay function and the cepstral coefficients. A muhi-channel group delay distortion mode/for simulation in MATLAB/ SIMULINK software is established. A QPSK system is simulated in multi-channel group delay. Simulation result shows that when in the same distribution the influence of the number of group delay distortion channels on TDRSS bit error rate （BER） performance is not pronounced.

关 键 词：群时延 复倒谱 多路群时延失真 误码率 

分 类 号：TN911[电子电信—通信与信息系统]