METHOD AND APPARATUS FOR SPECTRUM SENSING OF WIRELESS MICROPHONE SIGNALS

摘要

A method and apparatus for spectrum sensing for general wireless microphone signals are provided. The spectrum sensing algorithm developed makes use of the property that the autocorrelation function of a wireless microphone signal is a sinusoidal function provided that the frequency deviation is much smaller than the carrier frequency and the correlation delay is small. Based on this property, a simple spectrum sensing algorithm for the wireless microphone signal is designed by computing the autocorrelation function of the received signal and matched filtering of the sinusoidal function. The tones detected are further verified to see if they are located at one of the possible wireless microphone frequencies.