关键词: 无源定位, 到达时间差, 仰角, 低空目标

Abstract:

An improved passive TDOA location method is proposed. The novel method uses the elevation angle of the target as a new measurement to form a redundant location system consisting of three subsystems. Each subsystem can obtain a set of location results with ambiguity. A better performance can be achieved after eliminating the ambiguity by the nearest matching and processing the location results by SWLS fusion. Simulation results show that the proposed method has almost the same precision as the usual method for the high-altitude targets; however, it has a much higher precision for the low-altitude targets.

Key words: passive location, TDOA, elevation angle, low-altitude targets