群时延特性对卫星高速数传中继系统的影响  

Impact of Group Delay on BER Performance in High Data Rate Satellite Relay Systems

作　　者：侯利明[1] 孙宝升[1] 陆晓明[2] 

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]北京航空航天大学,北京100083

出　　处：《飞行器测控学报》2006年第2期54-58,共5页Journal of Spacecraft TT&C Technology

摘　　要：主要关注线性和抛物线特性的群时延对高速数传系统的影响，在分析了群时延特性的概念后，设计了具有仿真要求的群时延滤波器，建立模型对系统进行了仿真，得出了线性和抛物线特性的群时延对系统接收端信噪比恶化的影响，为整个系统的均衡程度提出了指标要求和参考。This paper discusses the impact of linear and parabolic group delay on high data rate satellite relay systems. Following an analysis of the concept of group delay, a special-purpose group delay filter is designed with simulation requirements. Then, a model is set up to simulate the system and the degradation of SNR at the receive port of the system caused by linear and parabolic group delay is got. Specification requirements and reference are also provided for channel equalization.

关 键 词：线性和抛物线特性群时延 高速数传 信噪比恶化 

分 类 号：TN911[电子电信—通信与信息系统]