分析了抗干扰AM通信系统原理和抗干扰的方法,并利用Multisim虚拟仿真软件为试验平台,设计抗干扰AM通信系统电路,利用Multisim提供的示渡器模块和频谱分析模块,分别对AM调制波和干扰抑制后的解调渡进行了波形和频谱分析.结果表明,Multisim在通信电路仿真中具有快速、准确、灵活的优点,而且所设计的自适应陷波器能够有效的抑制AM通信系统中的单频连续波干扰.%Wider band 、smaller distortion and more excellent anti-jamming performance are the key indexes to design amplitude modulation (AM ) communication system. Its principle and corresponding anti-jamming methods are analyzed,and the system circuits are designed based on Multisim. Finally the output waves and spectrum of modulation signal and demodulation signal are analyzed by the oscilloscope and spectrum analysis module. The experiment results show that the simulation in communication circuit is more flexible,more accurate and quicked using Multisim. Moreover,the designed adaptive notch filter can effectively suppress the singleton interference in AM communication system.
展开▼
