Modern radar and communication systems require the detection and parameter estimation of signal under a\nbroadband radio frequency (RF) environment. The Nyquist folding receiver (NYFR) is an efficient analog-toinformation\n(A2I) architecture. It can use the compressive sensing (CS) techniques to break the limitations of the\nanalog-to-digital converter (ADC). This paper demonstrates the restricted isometry property (RIP) of the NYFR\ndeterministically by applying the Gershgorin circle theory. And, the NYFR suffers a poor RIP for the broadband\nsignal, which will lead the conventional CS algorithms to be invalid. So, we derive the Fourier spectrum of the\nbroadband signal, which covered multiple Nyquist zones and received by the NYFR. Then, the broadband signal\ncan be regarded as the block-sparse signal. And, the block CS algorithms are applied for recovering the signal\nbased on the analysis of the block-RIP. Finally, the simulation experiments demonstrate the validity of the findings.
Loading....