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ANTI-JAMMING METHODSFOR PULSE PER SECOND SIGNAL IN SYNCHRONIZED SAMPLING UNIT BASED ON GPS

Gong Qingwu1 ,Liu Meiguan2 ,Zuo Kefeng1 ,Zhang Chengxue1 ,Li Xiaolu1 1.Wuhan University of Hydraulic and Electric Engineering,Wuhan 430 0 72 ,China 2 .Changsha Power Supply Bureau,Changsha410 0 0 7,China  
The scheme of synchronized sampling unit based on GPS is introduced briefly in the first part.Then this paper proposes in detail the software and hardware methods to lessen and eliminate jamming of pulse per second PPS signal in synchronized sampling unit based on GPS,according to the distinctive feature that PPS is always precisely located at the border between two successive seconds.The software method is simple and feasible.It is suitable for the situation that the inside resources of CPU are enough.The hardware method can save the inside resources of CPU.It is suitable for the situation that the load of CPU is heavy.The results of experiments show that the methods are effective to overcome the influence of jamming on synchronized sampling based on GPS.
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