Experimental Design of Frequency Domain Sampling Theorem Based on LabVIEW
Signal sampling can be conducted in the time domain or frequency domain.However,in practice,the students'understanding of frequency domain sampling is not deep enough.Therefore,a frequency domain sampling simulation experimental system based on LabVIEW signal processing tool is designed and implemented.The proposed system has an interactive and visual interface,and,can perform frequency domain sampling and signal recovery on various one-dimensional signals and two-dimensional images.The frequency domain sampling adopts the discrete Fourier method,and maintains the consistency of the data length before and after sampling through different zero padding methods in one or two dimensions,so as to compare and verify the sampling law.The application results show that the system has good versatility and interactivity,and can visualize the complete process of frequency domain sampling and signal recovery.Supplemented with basic theoretical derivation,this system can help students to correctly understand and apply frequency domain sampling theorem.
万方数据
维普
