AFF组网通信与测距/时间同步的新体制研究  

New techniques of intra-satellite communication and ranging/time synchronization for autonomous formation flyer

作　　者：李雪[1] 张其善[1] 徐勇[1] 王策[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《通信学报》2008年第5期81-87,共7页Journal on Communications

摘　　要：研究了自主编队航天器(AFF,autonomous formation flyer)的组网通信与测距/时间同步体制,提出了一种基于频分+码分组合多址模式和CCSDSproximity-1协议实现AFF组网通信,利用通信链路的双向异步传输帧实现AFF的任意两颗成员星之间的精密测距与时间同步的新方法。重点讨论了FDMA/CDMA组网体制下星间双向异步传输帧非相干扩频测距与时间同步的技术原理、计算公式推导和测量误差分析,给出了星间异步通信与测距技术的全功能地面实验系统设计、实验结果及其分析讨论,实测结果获得了满意的性能指标。The technique of intra-satellite communication networking and asynchronous ranging for autonomous formation flyer（AFF） were researched. The hybird FDMA/CDMA mode was developed for AFF communication networking, and precisely ranging ＆ time synchronization was performed by bidirection Asynchronous transfer flame of CCSDS proximity-1 protocol via intra-satallite microwave link in AFF. The principle of two-way noncoherent ranging mode about direct sequence spread spectrum（DSSS） was presented for intersatallite ranging/time synchronization in AFF FDMA/CDMA networks, concerned equations were constructed and two iteration compupting algorithms were derived. Then, the ground experimenting systems for studying and testing the performance of intra-satallite communication and two-way noncoherent ranging/time synchronization were presented with many experiment results and analyzing. Experiment results show that the satisfied performance is obtained.

关 键 词：自主编队航天器 频分/码分组合多址 空间数据系统近程链路协议 星间双向非相干测距 

分 类 号：TN927[电子电信—通信与信息系统] V443.1[电子电信—信息与通信工程]