Design Of Electromagnetic Spectrum Database For Collaborative Detection

The electromagnetic spectrum database in the distributed electromagnetic spectrum detection system has large data redundancy and slow data reproduction.In this paper,a distributed electromagnetic spectrum database based on the linked list structure is designed,which uses the characteristics of radio frequency signal propagation loss to compress data,and greatly reduces the amount of spectrum data that needs to be stored.The consistency protocol between spectrum databases ensures the consistency of signal source parameters,realizing a lightweight distributed electromagnetic spectrum database,which can quickly reproduce spectrum data.The main contents of this paper are as follows:In this paper,in order to accurately describe the electromagnetic environment,and effectively reduce the data redundancy of the spectrum database.The signal source parameters are estimated through cooperative detection,and the distributed spectrum database is established by using the parameterized data.At the same time,combined with the characteristics of propagation loss,the electromagnetic spectrum distribution is described from the perspective of effective signal source.This can replace the method of storing the raw radio frequency data of the electromagnetic spectrum from the time,frequency and space domains,and only store the signal source parameter values.The signal source parameters are stored in the data block,and the timestamp index of the data block is used to synchronize the data with other data blocks.A distributed spectrum database forming a linked list structure.When the detection node estimates the parameters of the signal source,if the network delay or the coordinate points of the delivery are inconsistent,it may cause the parameters of the same signal source estimated by each detection node to be inconsistent.This paper designs a consensus protocol for distributed spectrum database based on two-phase commit protocol,and uses distributed network to send and receive multicast packets.The spectrum database processes distributed transactions according to the feedback information in multicast,which can ensure the consistency of signal source parameters in the distributed electromagnetic spectrum database.In this paper,the spectrum data is visually analyzed based on the characteristics of propagation loss parameters,and the electromagnetic environment is reproduced in the web terminal combined with the electronic map.The electronic map is called by using the application program interface,and a unified interface is designed to access the spectrum database.Process the read signal source data in the electronic map interface,and use the canvas to present the results of the data analysis in the form of a heat map.A spectrum map with a more intuitive and flexible data interaction effect can be formed,and the data visualization of the spectrum database can be realized.