高跳速DS／FH混合扩频技术研究  

Study on High Hopping Rate DS/FH Hybrid Spread Spectrum Technology

作　　者：常啸鸣[1] 张晓林[1] 刘云阁[2] 占巍[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]中国西南电子技术研究所,成都610036

出　　处：《载人航天》2012年第2期14-20,共7页Manned Spaceflight

基　　金：载人航天领域预先研究项目(060104)

摘　　要：直扩/跳频(DS/FH)混合扩频技术的高保密性与强抗截获能力决定了其在抗干扰通信系统的重要作用。研究了制约高跳速DS/FH混合系统实现的因素,分析了制约高跳速速率提升的原因以及提高跳速可行的方法,提出了一种高跳速的DS/FH混合系统设计方案,该方案利用扩频码相位辅助跳频同步,搭建联合跟踪环路来同时完成对扩频码、载波及跳频序列的跟踪。计算机仿真与试验结果表明,该方案可以实现高达万跳每秒速率的DS/FH混合扩频系统。The high security and strong anti-interception capability of DS/FH hybrid spread spectrum technology determine its important role in anti-jamming communication systems. The constraining factors of the implementation of high hopping rate in DS/FH hybrid system are studied, and the reasons which restrict the increase of the hopping rate as well as the way to raise the hopping rate are theoretically analyzed. A design of the high hopping rate DS/FH Hybrid system is proposed, which exploits spreading code phase to assist the synchronization of frequency hopping and sets up a joint tracking loop to conduct the simultaneous tracking of the spreading code,the carrier and the hopping sequence. Computer simulation and experiment results indicate that this design can realize tens of thousands of hopping rate per second in DS/FH hybrid spread spectrum system.

关 键 词：DS/FH 高跳速 测距 捕获 跟踪 

分 类 号：TN914.4[电子电信—通信与信息系统]