一种通信卫星在轨测试中群时延特性测量方法及工程实现

Group Delay Specification Measurement in Payload IOT of Communication Satellite and Engineering Implementation

讨论了群时延的概念及群时延的测试原理和方法,并在通信卫星在轨测试的工程实现中,针对卫星转发器频段多及Ka频段转发器频率较高的特点,重点描述了综合群时延测试的方案设计及实现。经工程验证,该方法提高了在轨测试的效率和群时延测试精度。

This paper discusses the concepti of Group Delay（ GD）, and analyses the principle and method of GD measurement in detail. It gives a design method for measuring the GD in IOT （ In Orbit Test） for multi - band payload including Ka - band of the satellite communication in practical application. Practical measurement proves that the method improves the IOT efficiency and GD test accuracy.