in addition, the paper makes a research into fft in asynchronous sampling from the angle of iteration, and obtains a iterative formula 此外,本文从迭代收敛的角度研究了非同步取样时的fft,得出了一个迭代公式。
the software synchronization method, which can be used to recovery the eye diagram of asynchronous sampling data, was analyzed 分析了利用异步取样数据实现软件同步恢复从而获得随机码信号眼图的算法,为今后的应用研究打下基础。
the paper discusses the advent and development of digital sampling theory, inc-luding the synchronous sampling method , asynchronous sampling method and quasi-synchronous sampling method . of all the methods, hardware synthronous sampling method cost less and its software is small 本文简述了数字采样原理的产生和发展,对数字采样法中的三种主要方法即同步采样法、非同步采样法、准同步采样法做了基本介绍,并分别对其特点进行了比较。
the quantizing error, linear error and differential linear error of an a / d converter were deduced, after that the error model of synchronous sampling, asynchronous sampling and quasi-synchronous sampling algorithms used in power measurement were build in condition that a / d was not perfect 推导了a/d量化误差、非线性及微分非线性误差的数学模型。然后,建立了采样功率测量同步采样算法、非同步采样算法和准同步采样算法在非理想情况下的计算机仿真模型。
configuration and principle of sigma-delta a / d converter are simply analyzed in this paper, and the sigma-delta a / d converter is used in this measurement system . the history and development of digital sampling method are simply introduced in this paper . the important digital sampling " methods which include synchronous sampling method, asynchronous sampling method and quasi-synchronous sampling method are simply introduced and their specialties are compared in this paper 本文中对?ad转换器的结构和原理进行了简要的分析,并将其用于测量系统;简述了数字采样原理的产生和发展,对数字采样法中的三种主要方法即同步采样法、非同步采样法、准同步采样法做了介绍,并分别对其特点进行了比较。