The Design Of Marine Distributed Electromagnetic Spectrum Detection System

With the rapid increase of maritime frequency equipment,the maritime electromagnetic environment is becoming more and more complex,and problems such as maritime frequency conflict are becoming more and more serious,bringing greater challenges to the detection and control of maritime electromagnetic spectrum.Different from the terrestrial spectrum monitoring,the former is more affected by the Marine environmental parameters,and the electromagnetic spectrum detection system has many difficulties in detecting the spectrum data in the sea area.In this thesis,a Marine distributed spectrum monitoring system is proposed,which USES sensors to collect Marine environmental parameters,and through compensation and correction,can reduce the environmental impact on spectrum data detection,and provide a feasible means for effective detection of Marine electromagnetic spectrum resources.The research content includes the following aspects:Through the analysis of the theory and technology of the distributed spectrum detection in the sea,the scheme of the system is designed by using the distributed computing network.Detection node USES the energy detection algorithm,the waters of the unknown signal spectrum detection,multiple detection using Socket protocol to communicate between nodes and terminal,the use of a variety of sensors for detecting Marine environmental parameters in real-time,the detection of small antenna design,in order to reduce the change of the antenna attitude of data error caused by the join algorithm of spectrum occupancy rate,characterization of the usage of spectrum resources in the area,using the power density estimation algorithm,identify the change of the signal in frequency domain,combined with the surface of the diffuse transmission loss algorithm,to explore the influence of sea surface wind velocity spectrum data.Through the software design of the software requirements of the distributed spectrum detection system on the sea,and the development of the spectrum software of the detection node of the lower computer,the analysis of the sensor data and the storage of the spectrum data are realized to provide support for the historical playback of the detection data.Automatic conversion of solar power supply to ensure the system's endurance;The switch of communication network mode is realized,and the detection scenarios of single point detection and multi-point cooperative detection are supported.The development of the spectrum software of the upper computer terminal mainly realizes the acquisition of the detection node data of the lower computer and displays the sensor data on the UI interface.Realize data visualization,analyze spectrum data intuitively from multiple dimensions of frequency domain,time domain and space domain.Finally,this system compared with professional frequency spectrum detecting instrument testing,the various performance of this system is proved to satisfy the demand of the electromagnetic spectrum detection at sea,the sea test,verify the antenna attitude and the influence of sea surface wind velocity spectrum data,the analysis of measured data correction,to reduce the influence of Marine environmentparameters on the spectrum data,provide electromagnetic spectrum testing activities at sea with effective solution.