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

IQ通道失衡对同时收发认知抗干扰系统的影响
引用本文:黎海涛,钱一名.IQ通道失衡对同时收发认知抗干扰系统的影响[J].北京航空航天大学学报,2017,43(3):449-456.
作者姓名:黎海涛  钱一名
作者单位:北京工业大学信息学部,北京,100124
基金项目:Project Supported by Program of the Science and Technology on Avionics Integration Laboratory and the Aeronautical Science Foundation of China (2013ZC15003)航空电子系统综合技术重点实验室和航空科学基金联合资助项目
摘    要:针对同时收发认知抗干扰(SCAJ)系统中IQ通道失衡产生的镜像干扰降低网电空间数据链(CDL)抗干扰能力的问题,研究了IQ通道失衡的单/多频带SCAJ接收机干扰感知性能,推导出基于能量检测的IQ通道失衡接收机干扰检测概率和虚警概率,并据此提出了删除镜像信道干扰信号的有效方法。仿真结果表明,IQ通道失衡产生的镜像干扰降低了SCAJ接收机的检测概率,提出的镜像信道干扰信号删除方法可以减小IQ通道失衡的不利影响,从而提高数据链SCAJ系统性能。

关 键 词:网电空间数据链(CDL)  IQ失衡  同时收发  认知抗干扰  镜像干扰
收稿时间:2016-03-14

On the IQ imbalance at STAR based cognitive anti-jamming system
LI Haitao,QIAN Yiming.On the IQ imbalance at STAR based cognitive anti-jamming system[J].Journal of Beijing University of Aeronautics and Astronautics,2017,43(3):449-456.
Authors:LI Haitao  QIAN Yiming
Abstract:To enhance the anti-jamming capability of cyberspace data-link (CDL) in the complex electromagnetic environment,we explore the problem of the image interference caused by IQ channel imbalance in simultaneous transmit and receive based cognitive anti-jamming (SCAJ) system.The interference sensing of single-and multi-channel SCAJ system impaired by IQ channel imbalance is investigated,and energy detection based detection and false alarm probabilities in closed-form for SCAJ system are derived.Simulation results show that the detection probability of the SCAJ receiver is decreased by IQ channel imbalance,and the proposed interference cancellation scheme can reduce the adverse effect of IQ imbalance.
Keywords:cyberspace data-link (CDL)  IQ imbalance  simultaneous transmit and receive  cognitive anti-jamming  image interference
本文献已被 万方数据 等数据库收录!
点击此处可从《北京航空航天大学学报》浏览原始摘要信息
点击此处可从《北京航空航天大学学报》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