Simulation and experimental analysis of analog signal sampling time domain and frequency domain

The communication system is divided into analog communication system and digital communication system, which is called the digital transmission of the analog signal if the analog message is transmitted in the digital communication system. In the case of sampling, and the conversion of the frequency domain, the frequency domain is divided into natural sampling and the top sampling and the top sampling, the college level students will feel more difficult to understand, this paper USES the analysis method of simulationexperiment, aims to improve the student signal analysis ability, guide the students to experiment simulation, fully absorb, digest the relevant content of the sampling, thus the radiation communication principle is relevant, improve the effectiveness of teaching.