关键词: 非均匀采样, 频谱混叠, 带通信号重建, 内插函数

Abstract:

To extend the range of the sampling frequency, a method of periodically nonuniform bandpass sampling was put forward in which the value of the average sampling frequency was equal to that of the uniform sampling frequency without distortion. The spectrum aliasing was analyzed. And on the basis of the analysis, the conditions of the Fourier images of interpolants were given in the recovery of bandpass signal without distortion. The simulation example was presented to illustrate the calculation of interpolants and the reconstruction of bandpass signal from the nonuniform samples.

Key words: nonuniform sampling, spectrum aliasing, reconstruction of bandpass signal, interpolant