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Precise time frequency synchronization technology for bistatic radar

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4 Author(s)
Yulin, Huang ; School of Electronic Engineering, Univ. of Electronic Science and Technology of China, Chengdu 610054, P. R. China ; Jianyu, Yang ; Junjie, Wu ; Jintao, Xiong

A complete method of synchronization technology of bistatic radar using global position system (GPS) is presented. The pulse per second signal (lPPS) is elaborately modified to increase the time synchronization precision and keep loop locking. A very high time synchronization precision is achieved. Using the modified 1PPS to discipline the local OCXO, the reference frequency signal achieves both high long term stability (LTS) and short term stability (STS) properties. An algorithm, named phase abrupt change CFAR is presented to restrain the 1PPS phase abrupt change and keep loop locking. The experimental results indicate that this time and frequency synchronization method is effective and the time synchronization precision of the synchronization system can be improved from ±100 ns to ±25 ns. In addition, the phase noise is improved to 20 dB.

Published in:

Systems Engineering and Electronics, Journal of  (Volume:19 ,  Issue: 5 )

Date of Publication:

Oct. 2008

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