群时延对混合扩频信号接收的影响分析  

Analysis of the Influence of Group Delay on Hybrid Spread-Spectrum Reception

作　　者：张宗攀[1] 王楠[1] 刘瑞竹[1] ZHANG Zongpan;WANG Nan;LIU Ruizhu(Xi'an Branch,China Academy of Space Technology,Xi'an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,陕西西安710000

出　　处：《电子科技》2018年第4期73-76,共4页Electronic Science and Technology

基　　金：国家重点实验室基金(9140C530302150C53003)

摘　　要：针对信道群时延失真对直扩/跳频混合扩频信号接收性能的影响难以量化的问题,文中从混合扩频信号相关特性的角度出发,推导了存在群时延失真时的相关特性表达式,并通过数值积分的方式计算了不同群时延失真类型下的相关峰损失及其位置偏移情况,以此量化了群时延失真对混合扩频信号接收性能的影响。计算结果表明,随着群时延失真的逐渐恶化,相关峰值会不断降低;与此同时,群时延失真还会造成相关峰的裂变和位置的偏移,从而对混合扩频信号应用于测量系统带来不利影响。Aiming at the problem of quantify the influence of the channel group delay distortion on the performance of DS/FH hybrid spread spectrum signals,in this paper,from the point of view of correlation characteristics of hybrid spread spectrum signals,the expressions of correlation characteristics after the effects of group delay distortion are derived,and the correlation peak loss and its position deviation under different group delay distortion types are calculated by numerical integration,in this way,the influence of group delay distortion on the reception performance of hybrid spread spectrum signals is quantified.Calculation results show that with the gradual deterioration of group delay distortion the relative peaks will continue to decrease until they disappear,meanwhile,the group delay distortion also causes the fission and position offset of the related peaks,which has a negative effect on the spread spectrum signal applied to the measurement system

关 键 词：直扩/跳频混合扩频 群时延失真 相关特性 

分 类 号：TN914.43[电子电信—通信与信息系统]