Effects of IQ imbalance for simultaneous transmit and receive based cognitive anti-jamming receiver

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• 作者：Haitao Li ; ^{lihaitao@bjut.edu.cn} ; Yiming Qian ^{qianym0728@163.com}
• 关键词：IQ imbalance ; Simultaneous transmit and receive ; Cognitive anti-jamming ; Image interference
• 刊名：AEU - International Journal of Electronics and Communications
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：72
• 期：Complete
• 页码：26-32
• 全文大小：501 K
• 卷排序：72

文摘

In order to enhance the anti-jamming capability of Cyberspace data-link (CDL) in the complex electromagnetic environment, the performance of jamming sensing of simultaneous transmit and receive based cognitive anti-jamming (SCAJ) receiver impaired by IQ imbalance is investigated. Firstly, energy detection (ED) based the jamming detection and false-alarm probabilities in closed-form for single- and multi-channel SCAJ receiver are derived. Then, the image channel interference cancellation (IC) scheme is proposed to mitigate the image channel crosstalk. Simulation results show that the false-alarm probability is increased by IQ imbalance, and the proposed interference cancellation scheme can reduce the adverse effect of IQ imbalance, thus the anti-jamming performance of SCAJ receiver in CDL system can be improved.