A Velocity Filtering Method for Track - Before- Detect with Multiple Sensors

摘要

Detecting and tracking weak targets with multiple sensors performs superiorly to that with a single sensor. In this paper, a multi-sensor velocity filter based track-before-detect (MS-VF-TBD) method in mixed coordinates is proposed for weak target detection. First, the predicted position in the global Cartesian coordinates of each cell of each sensor is achieved in terms of the assumed velocity and the position in Cartesian coordinates which is converted by the cell in sensor coordinates. Then the measurement of the cell is added onto the cell closest to the predicted position converting back to the global sensor coordinates to realize the process of target energy integration within multiple sensors. The energy accumulation procedure of multiple sensors is derived in detail. Simulation results demonstrate the superiority of the proposed method compared with other MS- TBD methods in terms of detection probability and estimation accuracy.