Design And Implementation Of Virtual Anechoic Chamber Under The Airport Complex Electromagnetic Environment

With the increasing degree of information technology equipment under the airpot, types and quantities of equipment related to the frequency have increased dramatically; issues of electromagnetic compatibility and spectrum management that relate to equipment have directly made the overall capability of systems decline. How to get the real spectral characteristics that equipments radiate for analysis of electromagnetic compatibility between systems, when electromagnetic environment of the airport has Increasingly complicated, and large equipments can not enter the traditional test platform for EMC test. It is a current important issues that need to be resolved, but virtual anechoic chamber technology effectively solves the problem.This paper propose the basic theory and methodology and technology program, and provide a new method to achieve control of the spectrum and interference-resistant. Throughout the research process, the research idea was grasped firmly that needs lead the construction, and the paper determine the overall design of the virtual anechoic chamber on the basis of in-depth analysis related to the airport complex electromagnetic environment and traditional electromagnetic compatibility test platform.In accordance with the performance of virtual anechoic chamber at the overall design, the paper carry out a detailed design for the overall system components of virtual anechoic chamber, antenna array, receiver, signal processor, network transmission lines, etc. The paper do some requirements for some System softwares and interfaces.Finally, the virtual anechoic chamber performance of the system parameters are standardized to regulate, as a specific index requirements of chamber system structures.Signal processing algorithm is the core of the virtual anechoic chamber construction. This paper studies the Gerschgorin Radii algorithm, MUSIC algorithm, ESPRIT algorithm, AMUSE algorithm, JADE algorithm, etc, and do mathematical modeling and simulation by using MATLAB’s Simulink simulation software. First the paper build algorithm model based on the research in the early, then Integrate these algorithms within a simulation framework, last verify the treatment effect by the simulation data and measured signal data.On the basis of system overall design and signal processing algorithms, this paper built a virtual anechoic chamber system and test system to verify the system’s actual performance. Finally, the experimental test of virtual anechoic chamber under the airport electromagnetic environment proves more effective in blind signal separation, spatial spectrum estimation and the technology between the signal waveform and direction, which proved that the virtual anechoic chamber system complies with requirements designed.