群时延测试技术研究

Research on Group Delay Measurement Technology

群时延是描述信号相位失真的参数，群时延参数直接影响统一载波测控系统的跟踪测量、遥测、遥控、通信等功能，并对电视图像传输质量产生重大影响。本文论述了群时延的测试原理，并结合实际具体介绍了群时延测试方法在工程中的应用。

Group delay is a parameter which is used to describe phase distortion of signals. Group delay parameters will directly influence tracking, telemetry, command, communication of unified TT＆C systems and the quality of TV signal transmission. The paper discusses the theory of group delay measurement, and presents the application of group delay measurement method in engineering.