高精度频差测量方法研究

针对分布式多基地雷达多源信号产生与处理技术的关键问题,分析了现有频差测试方法,探索高精度频差测量方案。通过频差扩展方法,完成被测源间相对频差指标的高精度测量系统方案设计。此方案克服了传统时间同步设备需要大量时间来校正频率误差的缺陷,使校正之后的精度大大提高。根据设计方案研制了试验样机和测试系统,并通过对高精度源间相对频差的测量获得实测数据,测试结果验证了高精度频差测量方案的可行性。

A Study on High Precision Measuring of Frequency Difference

Aiming at the key problems appeared in multisource signal generating and processing technology in distributed multistatic radar, existing ways of measuring frequency difference are analyzed, and high precision measuring methods are plumbed. The high precision measuring scheme of the relative frequency difference among the tested sources is designed through expanding the frequency difference. The scheme shortens the measure time needed in traditional equipments, and increases the precision. The experimental device and testing system are produced. Through the relative frequency difference measuring of high precision soure, real data is gotten. Testing result verifies the feasibility of high precision measuring method.