SIGNAL RECOVERY AND DETECTION OF CERTAIN WIDEBAND SIGNALS USING MULTIPLE LOW-RATE ADCS

Abstract

There are certain wideband signals that occupy quite large bandwidths but may have dominant amplitudes in certain frequency bands. In this work, we show that these signals can be effectively sampled by a lower sampling rate compared to what is required by the Nyquist-Shannon sampling theorem. These resonant frequency components are split into separate receiver paths (subchains or channels) and sampled at a much lower sampling rate than is required for the entire wideband signal. It is shown that reconstruction of the signal is improved, and the probability of detection performance experiences little or no degradation since the effective noise power is attenuated by the proposed method.