基于TBD方法的弱小目标预警研究

Early Detection of Small Targets Based on Track-before-detection Method

运用了检测前跟踪(TBD)方法对多普勒警戒雷达中的弱小目标早期预警问题进行了研究。根据入侵目标的轨迹特点,分析了它在距离-多普勒平面中的转移规律,设计了新的建立在距离-多普勒域上的基于V iterb i搜索算法的帧间能量积累方法。最后,比较了该方法与传统的先检测后跟踪方法的检测性能,并给出了TBD方法的理论检测性能。

This paper presents use of track.before-detection （TBD） method for early detection of approaching targets for pulse-Doppler surveillance radars. Upon a careful study of the character of an approaching target trajectory, the law of admissible target transition between successive range-Doppler planes is analyzed. A modified Viterbi algorithm is designed to integrate energy in the range-Doppler domain. The detection performance of the proposed approach is analyzed and compared with the traditional track-after-detection （TAD） method. Moreover, the theoretical detection performance of TBD is also provided.