GPS同步采样装置中防止干扰GPS秒脉冲信号的措施

为削弱和消除干扰对基于ＧＰＳ同步采样装置的影响，在简要介绍ＧＰＳ同步采样装置的基础上，根据秒脉冲总是位于２Ｓ交界处的特点，提出了防止干扰ＧＰＳ秒脉冲信号的软硬件措施，其中，软件鉴别法简单可行，适用于ＣＰＵ内部资源充足的情况下，而硬件措施节约了ＣＰＵ的片内资源，适用于ＣＰ较重的应用场合。试验结果表明，该方法可有效地克服干扰信号对ＧＰＳ同步采样装置的影响。

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

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.