Interference detection in a wireless communication system

A receiver and method is applied in wireless communication system and coexistence into an interference for detecting. Is presented from a signal of the antenna (100) through a wherein a handle simulating part (200) and a a digital part (300). The receiver comprises: An element (240,260), wherein the element (240,260) comprises a group of pre-definition frequencies prior known plate; valueThe first branch element (230,252), derivation first detecting signals to the element (240,260) is signal in (S10, S22); A second branch unit (251,270), and further second detecting signal of the element (240,260) is signal (S21, S30, S20). Moreover, the receiver comprises a processing device (400), a processing first (S10, S22) and second (S21, S30, S20) detection signal equal to the first (S10, S22) and differential value and second (S21, S30, S20) detecting signals of compare with a threshold value; the threshold value is fixed to the element (240,260) prior known pad value. Is fixed by comparing the inspection, a frequency is for judging whether coexistent interference radar system.