基站信息采集仪中GPS模块干扰问题的解决

摘要

针对手持式移动基站综合信息采集仪GPS接收模块中GPS接收信号易被干扰这一问题，在实践应用中分析了干扰源并实行了相关抗干扰措施。经分析，干扰源主要来自时钟同步信号产生的高次谐波干扰以及其余部分电路产生的电磁波干扰。采取了利用RC低通滤波原理过滤高次谐波干扰和利用处理器休眠减弱其余电磁波干扰的措施。测试证明，该方案效果良好，能够解决终端信息采集仪中的抗干扰问题，对于同类终端抗干扰研究具有重要的参考价值。%The GPS receiving signals in GPS receiving module of handheld mobile base station integrated information collector are easily to be interfered. Aiming at this problem, in practical applications, the interference sources are analysed and related anti-interference measures are implemented. Through analysis, it is found that the major interferences are coming from higher harmonics interference produced by the clock synchronise signals, and the electromagnetic interferences coming from rest of the circuitry. The principle of RC low frequency filtering is adopted to filter higher harmonics interference;and processor sleep is adopted to weaken the electromagnetic interferences. The test proves that the effect of this strategy is good;it can resolve the anti-interference for terminal information collector, and provide important reference value to similar terminal anti-interference researches.