微波暗室中基于开关切换的动态干扰仿真方法

Dynamic interference simulation method based on switching in the microwave chamber

为了准确实时复现航空通信系统数据链路中复杂电磁空间环境,本文进行了动态干扰仿真.在静态暗室中设计一种能模拟真实飞行过程抗干扰的半实物仿真系统,并分析了航空通信系统数据链路的特性.在微波暗室中复现动态干扰时,通过微波仪表的控制实现电磁空间环境动态干扰的映射构建.采用参数化模型表征技术实时建立相应的动态干扰模型,并利用最小均方值方法设计出与其匹配的干扰切换的输出算法,利用动静结合的方法仿真实现了微波暗室中通过静态喇叭模拟动态干扰模拟功能.验证结果表明,采用本文的方法能够逼真的反映飞行器在真实环境下所受动态干扰的影响,该仿真系统的研究对提高航空通信系统数据链路的抗干扰性能具有参考意义.

To accurately and real-time reproduce complex electromagnetic space environment of aeronautical communications system data link, the dynamic interference was simulated. A semi-physical simulation system is designed to simulate the real flight＇ s anti-interference in static microwave chamber, then the characteristics of aeronautical communications system＇ s data chain is analyzed, when reproducing the dynamic interference in the anechoic chamber, the electromagnetic space environment＇ s dynamic interference mapping is achieved through the control of microwave instruments. The corresponding dynamic interference model is built in real- time by using the parametric model characterization techniques, and its matching output switching interference algorithm is designed by using the least mean square method. Thus, the function of simulating the dynamic interference through a static radio trumpet in the microwave chamber is realized by the method of combining static and dynamic simulation. Finally, the verification for anti-interference performance shows that the dynamic interference＇ s impact on the aircraft can be realistically reflected by the method of simulating dynamic interference in the anechoic chamber based on the microwave switch. The study of the simulation system can greatly improve the anti-interference performance of aeronautical communications system data chain.