混合扩频测控体制下高精度测速研究  

Study on Highly-Accurate Speed Measurement for DS-FH/MSK TT&C

作　　者：施磊[1] 苟先太[1] 草婷[1] 吴潜[2] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]中国西南电子技术研究所,四川成都650000

出　　处：《通信技术》2011年第7期96-98,共3页Communications Technology

摘　　要：针对具有大多普勒偏移的DS-FH/MSK信号进行捕获和多普勒偏移估计问题,介绍采用匹配FFT技术对载波进行粗估计,采用FFT频谱细化算法对载波多普勒频移进行精估计的方法。在较短的时间内同步系统的同时,对多普勒偏移进行高精度的估计和补偿。该方法对载波的多普勒频移的粗略估计能解决载波同步的问题,而对多普勒偏移的精确估计能解决测速问题。通过仿真表明,该方法能更快,更高精度地完成多普勒频移的估计,从而完成测控体制下高精度测速的要求。Coarsely estimation method based on match filter in combination with FFT is proposed,thus to solve the problem of large Doppler shifts in the course of DS-FH/MSK signal acquisition,and with FFT-based spectrum zoom frequency measurement,implement accurate estimation.The method in combination with the merit of estimation and compensation,could reduce the time and raise the precision,while the Doppler frequency is emplyed for speed measurement.Simulation result indicates that the proposed method could reduce resource consumption,implement the fast acquisition and the highly-accurate estimation and speed measurement.

关 键 词：混合扩频测控 多普勒偏移测速 匹配快速傅里叶变换 快速跳频 

分 类 号：TN914.4[电子电信—通信与信息系统]