| Citation: | 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. doi: 10.13700/j.bh.1001-5965.2016.0201(in Chinese)
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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.
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