28 / 2015-09-11 17:08:08

On the Performance of Full Duplex Cognitive Anti-jamming Receiver under IQ Imbalance

IQ imblance,Full-duplex,Cognitive Anti-jamming,Image interference

In order to enhance the anti-jamming capability of Cyberspace data-link (CDL) in the complex electromagnetic environment, the performance of jamming sensing of full duplex cognitive anti-jamming (FCAJ) direct-conversion receiver impaired by IQ imbalance is investigated. Firstly, the energy detection (ED) based the jamming detection and false alarm probabilities in closed-form for multi-channel FCAJ 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 FCAJ receiver in CDL system can be improved.