基于扩频信号的群时延测量方法研究  

Group Delay Measurement Method Based on Spread Spectrum Signal

作　　者：沙海[1] 朱祥维[1] 张国柱[1] 孙广富[1] 

机构地区：[1]国防科技大学电子科学与工程学院卫星导航研发中心,湖南长沙410073

出　　处：《现代电子技术》2010年第1期8-11,共4页Modern Electronics Technique

摘　　要：群时延测量在卫星导航、雷达、数字通信等领域获得了广泛应用。传统采用矢量网络分析仪测量群时延方法(特别是变频器件群时延)难以直接测量,且步骤复杂。在采用基于扩频接收机技术和信号相关技术的基础上给出了两种群时延测量方法,并重点分析了这两种方法的原理、步骤和准确度。通过实验仿真验证了其有效性。Group delay measurement is widely used in satellite navigation, radar and digital communication. The traditional group delay measurement method with Vector Network Analyzer（VNA） has difficulty in measuring directly（especially the converter） ,and process is complex. The two group delay measurement methods have been put forward,based on spread spectrum receiver technique and signal correlation technique apart, with emphasis on analysis of the concepts, steps and accuracy. The two methods are testified valid through the emulation experiment.

关 键 词：群时延 矢量网络分析仪 变频器 扩频 

分 类 号：TP914.42[自动化与计算机技术]