JAMMING WAVE REMOVER FOR RADAR RECEIVER

摘要

PURPOSE:To facilitate the alternation of a response characteristic by building a closed loop with which an auxiliary channel is equal in amplitude and phase to a main channel to make a time constant of a digital filter variable for an integration circuit in a base band circuit. CONSTITUTION:A signal X of an auxiliary channel is subtracted from a signal U of a main channel to obtain a signal Y cleared of a jamming radio wave. Here, information is obtained on amplitudes and a phase difference of the signal U of the main channel and the signal X of the auxiliary channel with a correlator and modulators 14a and 14b compose a closed loop to make the signal of the auxiliary channel equal in amplitude and phase to the signal of the main channel. Then, digital filters 27a and 27b are used as integration circuit in a base band circuit to make the current time constant variable. This facilitates the alteration of a response characteristic even when a characteristic or the like of a jamming wave changes.