基于LabVIEW的抽样定理仿真研究

Simulation of Sampling Theroem Based on LabVIEW

与连续时间信号相比,离散时间信号的处理更加灵活、方便,应用更加广泛。在实际应用中,通常先将连续时间信号转换成离散时间信号,前提是抽样过程必须满足抽样定理。抽样定理在连续时间信号与离散时间信号之间架起了一座桥梁。本文利用LabVIEW对抽样过程进行仿真,并对抽样定理的条件与结论进行验证和讨论,通过研究可以得到符合实际应用的结论,同时加深对抽样定理的理解和把握。

The processing for discrete-time signal is more flexible,convenient,and more widely used,compared with continuous-time signal.In practice,continuous-time signal is usually changed into discrete-time signal firstly,provided that the sampling process meets the sampling theorem.Sampling theorem sets up a bridge between continuous-time signal and discrete-time signal.But must the restrictions and conclusion of the sampling theorem coincide with the actual application？ In this paper,sampling process is simulated by using LabVIEW,and the conditions and conclusion of sampling theorem is validated and discussion,through which shows that the restrictions and the conclusion of sampling theorem agrees with the practice;meanwhile,understanding and grasp of sampling theorem is deepened.