Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (1): 32-38.doi: 10.3969/j.issn.1001-506X.2018.01.05

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Synchronization for fixed multibeam spread spectrum TT&C signals

DING Guodong, HAN Yuetao, YANG Zhiqun   

  1. Shandong Institute of Space Electronic Technology, China Academy of Space Technology, Yantai 264670, China
  • Online:2018-01-08 Published:2018-01-08

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Abstract:

For fixed multibeam spread spectrum telemetry, track and command(TT&C) signals synchronous and beam scanning problem, a method to realize fast synchronization and beam scanning is proposed. Large frequency deviation pseudo-random-noise(PRN) code synchronization is realized quickly by time division multiplexing correlation matched filtering and delay locked loop. After removing modulation information of PRN stripped signals, combined with the feed forward fast Fourier transform to the frequency estimation and decision feedback frequency and phase locked loop, achieve carrier synchronization of tracking array beam and carrier tracking of both tracking array beam and switching array beam in the process of beam switching. The simulation results show that the method can satisfy the high dynamic multibeam spread spectrum TT&C signals fast synchronization, fast scan and switching process of continuous demodulation.

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