摘要
为拓宽带通信号非均匀采样的采样频率范围,提出了一种周期性非均匀带通采样方法,该非均匀采样的平均采样频率在数值上等于带通信号无失真均匀采样的采样频率.分析了采样后信号频谱的混叠问题,在此基础上,给出了无失真重建时内插函数的傅里叶像函数应该满足的条件.计算机仿真实例验证了非均匀采样时内插函数的计算和带通信号的重建过程.
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 non-uniform samples.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2005年第4期66-68,73,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(60276017)
关键词
非均匀采样
频谱混叠
带通信号重建
内插函数
non-uniform sampling
spectrum aliasing
reconstruction of bandpass signal
interpolant
