全球定位系统在频率及其稳定度测量中的应用  

Application of Global Position System in Measuring Signal Frequency and the Stability of Signal Frequency

作　　者：刘晓明[1] 吴胜勇[2] 张华[3] 李新[2] 

机构地区：[1]重庆大学通信工程学院,重庆400044 [2]重庆大学电气工程学院,重庆400044 [3]西南科技大学信息与控制工程学院,四川绵阳621002

出　　处：《重庆大学学报（自然科学版）》2003年第2期5-8,共4页Journal of Chongqing University

基　　金：国家创新基金资助项目 (0 0C2 62 15 1113 2 6)

摘　　要：在测量信号源的频率及其稳定度时 ,以前普遍采用稳定度很高的晶振作为基准进行测量 ,但是测量精度不够理想 ,而其他的改善办法又使得费用过高。鉴于此 ,文中提出了一种新的方法 ,该方法以全球定位系统 (GPS)的秒脉冲作为基准 ,利用高密度可编程逻辑器件 (HDPLD)设计相应的电路 ,再用示波器进行观察测量。全球定位系统中采用了精度高、稳定性好的原子钟作为时间基准 ,而且它的接收设备价格便宜 ,因此 ,用这种方法开发的系统经济实用。实验结果证明 。Crystals with high stability are generally adopted as benchmark in the measurement of signal's actual frequency and stability, but the requirement of high precision can not be met. Some researchers found out improved methods, but it resulted in high costs. We introduce a new method, in which we use the second pulse creating from Global Position System as benchmark and design corresponding circuits in High Density Programmable Logic Devices(HDPLD), after that, we observe the resulting signals on oscilloscope. The pulse from Global Position System is easy to get and the whole system is very cheap. As the Global Position System is based on atomic clock which is accurate and stable, the measuring precision is improved greatly.

关 键 词：全球定位系统 实际频率 频率稳定度 GPS 测量方法 秒脉冲 

分 类 号：TM935.1[电气工程—电力电子与电力传动] P228.4[天文地球—大地测量学与测量工程]