首页 | 本学科首页   官方微博 | 高级检索  
     检索      

基于宽带调制信号的无源互调测试研究
引用本文:李砚平,黄浩,贺捷.基于宽带调制信号的无源互调测试研究[J].中国空间科学技术,2020,40(3):13-18.
作者姓名:李砚平  黄浩  贺捷
作者单位:中国空间技术研究院 西安分院 制造中心,西安 710000
基金项目:国家自然科学基金(61801376)
摘    要:随着收发共用和数字调制技术(如BPSK、QPSK)在卫星通信中大量使用,原有的连续波(continous wave,CW)无源互调(passive intermodulation,PIM)测试系统存在验证不充分的问题。设计了宽带调制信号PIM测试方法改进了原有的测试系统,通过采用通道功率测试PIM,测试研究结果表明BPSK、QPSK数字调制无源互调量值均高于连续载波信号2~9dB,考虑到卫星运行可靠性,采用数字调制宽带工作模式改进原有测试系统后更接近实际工作方式,提高了地面验证可靠性。

关 键 词:收发共用  无源互调  数字调制  连续载波  测试  
收稿时间:2019-12-23

Research on passive intermodulation based on broadband modulation signal
LI Yanping,HUANG Hao,HE Jie.Research on passive intermodulation based on broadband modulation signal[J].Chinese Space Science and Technology,2020,40(3):13-18.
Authors:LI Yanping  HUANG Hao  HE Jie
Institution:Manufacturing Center, China Academy of Space Technology (Xi'an), Xi'an 710000, China
Abstract:With the extensive use of transmitter-recevier sharing and digital modulation (BPSK,QPSK) technologies in satellite communication, there are insufficient verification problems in the original continuous wave (CW) and passive inter modulation (PIM) test system. In this paper, a broadband digital signal PIM test method was designed by using the channel power to test PIM. The test results show that digital modulation PIM values of both BPSK and QPSK signals are higher than the CW carriers by 2~9 dB. Considering the operational reliability of the satellite, the digital modulation working mode was adopted to improve the original test system and the new test is closer to the pracical work, which improves the reliability of ground verification.
Keywords:transmitter-receiver sharing  passive intermodulation (PIM)  digital modulation  continuous wave carrier  test   
本文献已被 CNKI 等数据库收录!
点击此处可从《中国空间科学技术》浏览原始摘要信息
点击此处可从《中国空间科学技术》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号