摘要
本文指出目前带通信号直接采样和重构定理是不充分和不完整的,基于Shannon采样定理的频谱褶叠概念,本文提出了带通信号离散化后频谱的二类混淆现象,即叠加混淆和错位混淆的概念,给出和证明了带通信号直接采样和重构定理.同时,本文说明Shannon采样定理是本文提出定理的一个特例。
An explanation about the imperfection and, in some areas, incorrectness of the sampling andreconstruction theorem of bandpass signals given before is presented at first. Then, two different spectial aliasingsof bandpass signals, called spectral overlap aliasing and spectral reversed aliasing, have been classified and the newdirect sampling and reconstruction theorem of bandpass signals is put forward and proved. At last, that theShannon sampling theorem is a special case of the new theorem in this paper is resulted.
出处
《信号处理》
CSCD
北大核心
1993年第4期194-198,共5页
Journal of Signal Processing
关键词
带通信号
频谱分析
采样
重构
bandpass signals,sampling, aliasing, spectrum analysis
