This　paper　investigates　the　jamming　sensing　performance　of　the　simultaneous　transmit　and　receive　based　cognitive　anti-jamming　(SCAJ)　receiver　impaired　by　phase　noise　in　local　oscillators　(LO)　over　fading　channels.　Firstly,　energy　detection　(ED)　based　on　the　jamming　to　noise　ratio　(JNR)　of　the　high　frequency　bands　SCAJ　receiver　with　phase　noise　under　different　channels　is　analyzed.　Then,　the　probabilities　of　jamming　detection　and　false　alarm　in　closed-form　for　the　SCAJ　receiver　are　derived.　Finally,　the　modified　Bayesian　Cramer-Rao　bound　(BCRB)　of　jamming　sensing　for　the　SCAJ　receiver　is　presented.　Simulation　results　show　that　the　performance　degradation　of　the　SCAJ　system　due　to　phase　noise　is　more　severe　than　that　due　to　the　channel　fading　in　the　circumstances　where　the　signal　bandwidth　(BW)　is　kept　a　constant.　Moreover,　the　signal　BW　has　an　effect　on　the　phase　noise　in　LO,　and　the　jamming　detection　probability　of　the　wideband　SCAJ　receiver　with　lower　phase　noise　outperforms　that　of　the　narrowband　receiver　using　the　same　center　frequency.　Furthermore,　an　accurate　phase　noise　estimation　and　compensation　scheme　can　improve　the　jamming　detection　capability　of　the　SCAJ　receiver　in　high　frequency　bands　and　approach　to　the　upper　bound.