SECOND-ORDER NONUNIFORM SAMPLING FOR THE FAST RECOVERY OF BANDPASS SIGNAL
二阶非均匀带通采样信号的快速恢复

Fast recovery and frequency-shifting of real bandpass signal based on second-order sampling is discussed. Using FFT and complex filtering, real bandpass signal can be recovered as a analytic signal whose central frequency is within two times of its bandwidth, and phase property is not changed. Finally, using simple computation, original frequency can be acquired. Computer simulation shows the correction of the method.