Hardware Design of DC-3GHz Compressed Sensing Receiver Based on Modulated Wideband Converter

Abstract

Modulated Wideband Converter (MWC) is a sub-Nyquist sampling structure suitable for wideband sparse signals. Based on MWC, this paper designs a DC-3 GHz Compressed Sensing (CS) receiver system with commercial devices. Combined with some standard compressed sensing algorithms, this receiver can sense the spectrum from DC to 3 GHz and receive at most six 40 MHz real signals simultaneously without prior knowledge of the carrier frequencies. This receiver with 60 dB dynamic range is designed to have six physical branches, and each branch contains an Analog-to-Digital Conversion (ADC) which operates at 245 MHz. The total sample rate of 1470 MHz is much smaller than the Nyquist sampling rate of 6 GHz. Based on a classical algorithm named SBR4, multiple sets of multiband signals with different input power are successfully blindly reconstructed.