基于Multisim的模拟信号(AM、DSB)传输系统设计

With the progress of computer technology, sensor technology and microelectronics technology, communication is developing rapidly in the direction of digitization, intelligence, high speed, broadband, integration, mobility and personalization. Modulation is a module that can transmitsignals in a suitable way in the channel. It can improve the channel utilization and the anti-interference ability of the system.This topic is to learn how to use multi analog simulation software to design analog signal (AM, DSB) amplitude modulation and demodulation system. The simulation design of baseband signal source, modulator, Gaussian channel, demodulator and other related modules, as well as the modulation and demodulation of the signal are completed. Finally, the original basebandcan be covered within the allowable error range, the modulator of output signal to noise and output signal to noise can be measured, and the performance and shortcomings of the system are summarized.