Study of Sampling theory and solution
and its applings in Harmonic analysis
ABSTRACT: This paper investigated the sampling theory.And from the fourier series ,the mathmatic bases of sampling and harmonics analyzing are proposed.The fundamental methods of harmonics analyzing (DFT and FFT)are performed. The comprision investigated the character of the three sampling theory including synchronous sampling method ,non-integer-period sampling method and quasi-synchronous sampling method.Base on understanding,I sampled data and analyzed harmonics waveform with software Matlab .Through comparing them with each other ,we study their advantage and shortcoming.
We will choose a adaptive sampled-data measure to solve the harmonic analysis of the middle frequency generator.This paper subject apply non-integer-period Sampling method to harmonic analysis with Labview virtual device technology.the voltage is sampled with DAQ board and computer display the finally result of forty harmonics.
Keywords:Sample; Harmonics analyzing; Virtual instrument; Figure programming; The digital signal process