|
|
A Technology of On-line Measurement of QPSK Multicarrier Signal Delay |
ZHANG Jing-xi,HU Yong,LI Yue |
Southwest China Institute of Electronic Technology, Chengdu, Sichuan 610036, China |
|
|
Abstract Aiming at the problem that traditional general instruments can’t on-line measure the delay of QPSK multi-carrier signal in a new generation of spread-spectrum TT&C system and BEIDOU system. A method of measuring the QPSK multi-carrier signal delay is proposed. Synchronizing signal is realized low-distortion&long-distance transmission by fiber optics. Multi-carrier signal is successfully separated by FIR filter without nonlinear distortion and the delay from filter was calculable and the delay of QPSK signal is successfully measured by using the technology of enveloping with gate. Measurement system architecture is proposed and the QPSK multi-carrier signal delay measurement system is successfully developed which realized high-accuracy on-line measurement for uplink delay of transponding satellite navigation testing system based on the method.
|
Received: 18 August 2015
Published: 14 October 2016
|
|
|
|
|
[1]陈星.统一扩频测控体制捕获技术的研究[D].长沙:国防科学技术大学,2010.
[2]韩勇,李庆波.电离层效应的测时误差及其修正[J].空间科学学报,2012,32(1):55-59.
[3]黄凯冬,尹仲琪,胡勇.利用矢量网络分析仪测量时延特性的方法[J].电讯技术,2007,47(1):193-195.
[4]王健.卫星扩频测控系统接收同步技术研究[D].哈尔滨:哈尔滨工程大学,2010.
[5]万力劢.基于示波器的调制系统时延测量[J].国外电子测量技术,2013,(5):42-45.
[6]纪雄飞,曲艺海.光纤传输技术在数据链中的应用[J].光传输,2013,(5):17-19.
[7]林永照,吴成柯,刘学文.带宽有效包络恒定的连续相位QPSK 调制[J].系统工程与电子技术,2008,30(5):806-809.
[8]魏瑞.数字基带传输系统码间干扰的研究[J].电脑知识与技术,2012,8(24):5906-5908. |
|
|
|