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

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 and time synchronization was performed by bidirection Asynchronous transfer frame 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.