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介绍了一种系统级电磁兼容(EMC)分析技术—离散非线性分析(Discrete Nonlinear Analysis,DNA)的发展现状,该技术起源于线性离散EMC分析技术,后者是为开发系统内电磁兼容分析程序(IntrasystemElectromagnetic Compatibility Analysis Program,IEMCAP)所提出的方法。DNA技术可应用于以下方面:在极端恶劣电磁环境(EME)中(调制信号数目高达100 000)对无线电发射和接收建模;在一次仿真中需要综合考虑各种效应,包括线性(增益、衰减、滤波等)和非线性(互调、减敏、交调、相互混频、调幅调相转换等)效应以及高阶的非线性响应(25阶或更高);进行快速EMC分析(电磁环境越复杂,非线性效应阶数越高,DNA方法相对于传统方法的计算优势越大;自动搜寻非线性干扰源。
A system-level electromagnetic compatibility (EMC) analysis technique, Discrete Nonlinear Analysis (DNA), is introduced. The technique originated from the linear discrete EMC analysis technique, which is developed for the development of electromagnetic compatibility analysis program (Intrasystem Electromagnetic Compatibility Analysis Program, IEMCAP). DNA technology can be used to model radio transmission and reception in extremely harsh electromagnetic environments (EMEs) (modulation signals up to 100 000); a variety of effects need to be considered in one simulation, including linearity (gain, attenuation , Filtering, etc.) and non-linear (intermodulation, desensitization, intermodulation, intermixing, amplitude modulation phase shifting, etc.) effects and higher order nonlinear responses (order 25 or higher) The more complex, the higher the order of the nonlinear effect, the greater the computational advantage of the DNA method over the traditional methods; the automatic search for non-linear sources of interference.