Impulse noise reduction circuit for communication receivers

In this paper a comparatively simple scheme of reducing the impulse noise is suggested. This system consists of a gating signal generator and a balanced gate. It functions as follows: the impulse noise in the antenna triggers the gating signal generator. This generator produces a gating signal which in turn controls a balance gate. The function of the gate is to block the transmission during the gating period. Both the principle and the circuits of this impulse noise reduction scheme are described. Experimental results give the improvement of signal to noise ratio at the audio output ranging from 14 to 18 db.