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.　(C)　2016　Elsevier　GmbH.　All　rights　reserved.