A Reconstruction Failure Detection Scheme for Modulated Wideband Converter Based Compressed Spectrum Sensing

A basic premise for Modulated Wideband Converter (MWC) applying to spectrum sensing is that the signal spectrum is sparse. Otherwise, the reconstruction result will be incorrect. A method of judging whether the reconstruction is successful is proposed for MWC compressed sensing. It utilizes the correlation between two consecutive reconstructed subband energy. Simulation results show that the method can judge whether the reconstruction is successful with high accuracy, and can reduce the interference probability with primary users when the spectrum is not that sparse.