摘要
数据采集面临两类问题:要有更高的采样率,来满足对高频信号的采样需求;能有更大的采样动态范围,来满足对微弱信号的采样需求。欠采样技术和过采样技术的出现很好地解决这两个问题。文章将解析欠采样和过采样的基本原理,并利用欠采样和过采样解决实际遇到的问题。
Data acquisition is facing two problems：One is the need of a higher sampling rate, to meet the demand of high fre-quency signal sampling.Two is the need of a greater dynamic range of sampled, to meet the demand of the weak signal sampling. Owe sampling technology and over sampling technology can solve these two problems. This paper will analysis the basic prin-ciple of sampling and owed over sampling, and the use of these two kinds of technology to solve practical problems.
出处
《信息通信》
2015年第4期18-19,共2页
Information & Communications
关键词
采样定理
欠采样
过采样
sampling theorem
Owe sampling
over sampling
