A random demodulator with a software-based integrator resetting scheme

The random demodulator architecture is a compressive sensing based receiver that allows the reconstruction of frequency-sparse signals from measurements acquired at a rate below the signal´s Nyquist rate. This in turn results in tremendous power savings in receivers because of the direct correlation between the power consumption of analog-to-digital converters (ADCs) in communication receivers and the sampling rate at which these ADCs operate. In this paper, we propose a random demodulator with a software-based integrator resetting scheme that does not use a switch to reset the integrator as in the conventional random demodulator system, but rather modifies the random signal so that the integrator is reset by zeroing the input. We show that the proposed system is equivalent to the conventional random demodulator, but is more practical to implement because of the many artifacts presented by switches.