Intercept of Frequency Agile Signals with Nyquist Folding Receiver Using Binary Phase Shift Keying as the Local Oscillator

摘要

With the application of compressed sensing theory, Nyquist folding receiver achieves a full-band reconnaissance with a low sampling rate. Based on this structure, we introduce the synchronization mechanism and take the form of binary phase shift keying signals as the digital local oscillator. The synchronization information is used to estimate the parameter of frequency agile signals through zoned conjugate matching. Simulations show that the probability of correct estimation of Nyquist zone is higher than 90% when signal to noise ratio is equal to or greater than -9 dB.