基于Matlab的模拟通信调制信号仿真分析

Simulation Analysis of Analog Communication Modulated Signal Based on Matlab

模拟通信系统在中短波通信领域有着广泛的应用,对模拟通信信号进行调制方式分析的数据源主要来自于实际接收数据。由于受到各种条件的限制,实际接收数据在教学科研中很难获得,而仿真数据能够通过仿真软件生成。对模拟调制系统的工作流程进行了介绍,并给出了多种模拟调制信号的生成原理,对不同调制方式的性能进行分析,对AM,DSB,SSB,VSB,FM五种模拟通信数据进行仿真。仿真程序可对采样频率、信噪比等参数进行灵活设置,并按要求生成dat格式数据文件。仿真实验结果包括上述信号的频谱图、时频谱图等,能够为实际环境中通信系统和通信对抗设备的调试、验证以及工程应用提供参考。

The analog communication system has a wide range of applications in the field of medium and short wave communication.And the data source for analyzing the modulation mode of the analog communication signal mainly comes from the actually received data.Due to various constraints,it is difficult to obtain the actually received data in teaching and research,while the simulation data can be generated by using the simulation software.Firstly,the workflow of the analog modulation system is introduced,and the generation principle of multiple analog modulation signals is given.Then,the performance of different modulation methods is analyzed.Finally,five kinds of analog communication data of AM,DSB,SSB,VSB and FM are simulated.In the simulation,parameters such as sampling frequency and signal-to-noise ratio are flexibly set,and data files in dat format can be generated as required.Simulation results include the spectrogram and time domain diagram of the mentioned signals,which can be regarded as referrence for the debugging,verification and engineering application of communication systems and communication countermeasure equipments in the real environment.