고속 이동체에 특화된 TDOA/FDOA 기반 위치 추정 알고리즘

Abstract

Accurately determining the precise location of rapidly moving objects at high speeds of 1 Mach (340 m/s) or higher, such as missiles or fighter jets, is an important problem in the fields of aerospace and defense. Typical technologies for estimating the location of moving objects include TDOA (Time Diffence of Arrival) and FDOA (Frequency Difference of Arrival), which ensure excellent estimation performance for low-speed moving objects, but they may suffer significant estimation performance degradation in estimation accuracy when applied to high-speed moving objects. In order to enhance this problem, in this paper, we propose the combined location estimation algorithm based on TDOA and FDOA, complementing the limitations of each other. The proposed algorithm estimates the initial position of the moving object by employing TDOA, and it estimates the speed and direction of the moving object to predict its movement path by employing FDOA. The performance of the proposed algorithm is evaluated through computer simulations considering various scenarios. In the future, if the proposed algorithm for high-speed moving objects is applied in real, it is expected that effective position estimation in dynamic environments will be possible by estimating the position, speed, and direction.