A Research on Signal Processing Technique of Passive Radar Based on GPS

This paper has firstly introduced signal characteristics of GPS external illuminators, then focused on the basic principle of passive location, studied a Tⁿ-R multi-static positioning system utilizing Time Difference of Arrival (TDOA), given a specific method solving target location, implemented detailed analysis of positioning accuracy of the positioning system, and lastly introduced a target tracking algorithm based on impacts of Extended Kalman Filter. The paper has carried out simulation of influences of factors including distance measurement errors and station location errors on passive location accuracy, and launched simulation comparison of factors influencing tracking accuracy. The results have indicated that the algorithm in this paper not only boasts a fast convergence speed, stable performance and a high locating and tracking accuracy, but can also be able to meet practical needs.