基于行为级建模的通信电台同址干扰预测分析  

Prediction and analysis of co-site interference between radio communications based on behavioral modeling

作　　者：李胤[1] 郑重[1] 刘久文[1] 刘焱[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《电子测量技术》2011年第11期122-126,共5页Electronic Measurement Technology

摘　　要：当多部电台同时在有限空间内工作时,同址工作的发射机必然会对接收机产生干扰,这些干扰会严重影响无线电通信质量。首先详细分析了放大器的非线性特性对同址干扰的影响,建立了放大器MRF422的具有记忆特性的行为模型。进而提出了一种以信纳比为判据对系统进行行为级建模进行预测分析的方法。最后,在ADS(AdvancedDesign System)仿真环境中对该方法进行了验证,以两个数字电台的三阶发射机互调产物对调频电台的干扰为例,给出了同址安全带宽的求解过程。When multiple radio communications working in limited space,co-site working transmitters will inevitably interfere with the receivers,These disturbances may seriously affect the quality of radio communication.First giving detailed analysis of how the nonlinear characteristics of the amplifier effect on co-site interference,and building a behaviour model with memory characteristics of amplifier MRF422.Then proposing a method used SINAD as a criterion to predict and analyse the system through the behaviour model.Finally,the method is validated in the ADS（advanced design system） simulation environment,and through the example of three-order product of two digital radio transmitters which interferes a FM receiver,showing the solution process of calculating the secure bandwidth.

关 键 词：行为建模 非线性特性 ADS 同址干扰 

分 类 号：TN914[电子电信—通信与信息系统]