Detecting man-made noise by using its wideband characteristic

Man-made noise (MMN) is an electromagnetic perturbation which is very harmful to digital communications, hence the general interest in suppressing it from communication channels. The main difficulty when trying to do so is to distinguish MMN from the transmitted signal. This paper presents a novel method to detect MMN, by taking advantage of its bandwidth which is much wider than that of a typical communication channel. Two variants are proposed: The first one demodulates the MMN within a wide bandwidth containing the communication channel; the second one demodulates the MMN within an idle channel next to the communication channel.