遥测信号检测中多普勒影响及其补偿研究  

Research on Doppler Influence on Telemetry Signal Detection and Its Compensation

作　　者：王志国[1] 吴海洲[1] 王鹏毅[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2013年第1期22-24,共3页Radio Engineering

摘　　要：采用帧头相关法可实现航天测控中低信噪比遥测信号检测,但目标的高动态特性将降低相关积累增益。为了解决遥测信号相关检测中多普勒频移补偿的难题,介绍了帧头相关检测的实现方法,分析了多普勒频移对检测峰值的影响,在对比多种补偿方法的条件下,提出了多路补偿的方案。仿真结果表明:所提方法能实现在低信噪比、高动态条件下调频遥测信号的多普勒频移补偿。In aerospace TTC,frame correlating detection can realize low signal-to-noise ratio signal detection.But the high-dynamic characteristic of target tends to decrease the accumulation gain.To address the challenge of Doppler frequency-shift compensation in correlation detection of telemetry signal,the realization method of frame correlation detection is introduced.Then the effect of Doppler frequency-shift on detection peak value is analyzed.Based on a comparison of several Doppler frequency-shift compensation methods,the multi-channel compensation method is proposed.The simulation results show that the Doppler frequency-shift compensation of low-SNR and high-dynamic frequency modulated telemetry signal can be realized by the proposed method.

关 键 词：调频遥测 帧头相关检测 多普勒频移 多路补偿 

分 类 号：TN911[电子电信—通信与信息系统]