A Cooperative Localization Algorithm Based on UAV Platform

Aiming at the location of fixed radiation source, a cooperative location method combining TDOA location and FDOA (frequency difference location) is proposed based on UAV platform and directional antenna. Firstly, relying on the directional antenna of the UAV platform and based on the received signal strength, the method roughly locates the radiation source and searches the best location point, so that the radiation source is located at the vertical position of the two location points; Then, according to the TDOA location and FDOA algorithms, the emitter location is calculated cooperatively; Finally, the positioning accuracy is simulated and analyzed. The results show that when the time difference measurement and frequency difference measurement are controlled within a certain range, the error of joint positioning can be controlled in a small range, which is inversely proportional to the distance between the two positioning points and directly proportional to the distance between the radiation source and the positioning point. This method makes full use of the UAV mobile search function to optimize the positioning points, and then cooperates with TDOA and frequency difference positioning, which can effectively improve the positioning efficiency while reducing the point position error.