Probability of detection of pulsed signals employing zero-gating interference suppression

A compensation method is presented which can be used to extract a pulse signal from a mixture of signal and continuous interference which combines a compensator and zero-gating interference suppression device. The noise suppression device consists of a zero counter and an analog switch with voltage applied to its input. The switch opens only when the interference is zero. The blanking pulse is so short that the interference voltage during the pulse can be disregarded. The probability of pulse signals coinciding with interference nulls is investigated, assuming that the interference levels in the primary and auxiliary channels are different, but that the nulls coincide. The false alarm probability is investigated, and a formula is derived for the maximum correct detection probability which can be realized.