A cross-channel problem will appear when a wide-band signal passes the channelized receiver with multi-channel output. It's very meaningful to solve the cross-channel problem quickly and efficiently. This paper analyzes the time-association relationship between the output signals in adjacent channel, and then a criterion of whether the outputs came from the same radiant point is proposed, meanwhile a reliable method of estimating signal's parameters is presented, which can be used to effectively and conveniently solve the cross-channel problem. The simulation results show that the judge of the same radiant point can be performed effectively when the parameters of the receiver are stable, and while SNR is greater than -3dB, the parameter estimation algorithm is of high precision, and the relative error of pulse amplitude is less than 7%.