Research On Key Technology Of Broadband Electromagnetic Environment Monitoring System

With the development of electronic technology, broadband signal has been morewidely used in military and civilian equipment in the field, such as radar, electronicwarfare, and wireless communications, resulting in the battlefield and the electromagneticenvironment is worsening daily. On the one hand, harsh electromagnetic environmentmay lead to reduced performance of military equipment or even impossible to work; onthe other hand, in this case, for the management of spectrum resources, the country isfacing increasingly severe test. Broadband electromagnetic environmental monitoring isthe collection, processing, recording, playback and analysis of wideband signals in realelectromagnetic environment, which is playing an increasingly important role in theperformance verification of weapons and spectrum resources management and otherapplications. This article will conduct research on broadband electromagneticenvironment monitoring key technologies and signal analysis algorithms, as follows:In order to improve the sampling rate, this paper introduces the theory of parallelacquisition of time-domain, and for time-domain parallel acquisition introduction ofinterference,this paper conducts analysis and simulation to propose a method to optimizethe interference. Next article discusses the parallel filtered digital down conversiontechnology and the spectrum monitoring technology and presents parallel filtering digitaldown conversion technology method based on the high-speed FIR and spectrummonitoring method based on vector accumulation, to resolve the requirements forreal-time signal processing. Then, the paper describes the parameters monitored of thesignal in the time domain, frequency domain, code domain and modulation domain, andfocuses on the characteristics of the modulation domain parameter. It is proposed basedon singular value decomposition filter fast wavelet ridge methods. In low SNRenvironment, the method improves the recognition rate in the usual pulse modulation.To verify the findings of broadband electromagnetic environment monitoringtechnology, based on the existing framework to build broadband electromagneticenvironment monitoring system. The system can collect2.4GHz frequency high-speedacquisition, bandwidth up to1GHz, while stable real-time monitoring of the signalspectrum. In less than0dB SNR case, it has a high recognition rate on modulationcharacteristics.Broadband electromagnetic environment monitoring system not only toverify the results of technical studies, and has practical applications.