| Summary: | In order to solve the problem of three-band bandpass signal aliasing, a delay-adjustable third-order bandpass sampling structure is proposed. By designing a digital anti-aliasing filter, the alias-free reception of three-band bandpass signals can be realized. The simulation results are given, the signal is reconstructed and the anti-aliasing performance is analyzed. After the three-passband signal passes through the anti-aliasing filter, the signal output signal-to-noise ratio can be above 28 dB. This method solves the bandpass. The multi-signal aliasing problem in sampling increases the sampling frequency selection range, which reduces the hardware burden and improves the flexibility of the software radio.
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