Research On Passive Localization Method Of Communication Radiation Source Using Monkey Swarm Algorithm

With the rapid development of wireless communication technology,the reconnaissance and positioning of enemy communication radiation sources in modern electronic warfare has also received extensive attention.The passive time difference positioning of the communication radiation source means that the detection station does not actively send signals to the communication radiation source target,but passively receives the communication radiation source signal.Radiation source location.This paper mainly focuses on the research on the passive time difference positioning technology of the communication radiation source.In the passive positioning system of the communication radiation source,in view of the large positioning error of the current passive time difference position solution method,a weighted least squares method and an improved monkey group algorithm are proposed.The joint communication radiation source position calculation-recursion method,the main work completed in this paper includes:Firstly,according to the basic principles of several passive positioning technologies,the advantages and disadvantages are analyzed,and the basic principles of passive time difference positioning methods are mainly introduced,and their advantages and disadvantages are analyzed.Several important evaluation methods of system performance.Then,two kinds of arrival time difference acquisition technologies and two time synchronization methods between detection stations are introduced.Combined with the actual station deployment environment,the time accuracy of the time synchronization methods between the two detection stations is compared and analyzed.A method to get the difference in arrival time.Secondly,aiming at the problem that the weighted least squares method has a large positioning error for non-cooperative communication radiation sources,a positioning method is proposed which uses the improved monkey swarm algorithm to correct the positioning results of the weighted least squares method.Firstly,the positioning result of the weighted least squares method is used to determine the search range for the monkey swarm algorithm;then,it improves the step size of the climbing process and the look-and-jump process,and uses two adjustment factors to change the climbing step length and the look step length to solve the problem of monkeys.The local convergence problem of the swarm algorithm and the improvement of the algorithm accuracy;finally,the overall process of the joint positioning solution-recursion method using the weighted least squares method and the improved monkey swarm algorithm is introduced.Finally,the non-cooperative communication radiation source is located and tracked in a 5km× 5km× 5km space field by using the weighted least squares method and the improved monkey swarm algorithm joint positioning solution-recursion method to simulate the location and tracking of the mobile non-cooperative communication radiation source.The two-stage weighted least squares(Two-Stage Weighted Least Squares,TSWLS)positioning and tracking results were compared,and the root mean square error was analyzed.,GDOP),and experimental simulation to compare the positioning system GDOP designed in this paper with the TSWLS positioning method GDOP;then experimental simulation of several other station layout methods GDOP,and compared with the station layout method GDOP designed in this paper;Cramer-Rao Lower Bound(CRLB)analyzed the accuracy of the positioning system designed in this paper.Simulation experiments show that the positioning accuracy of the positioning system designed in this paper is better than the traditional method.