A 3D Multi Targets Track before Detect Algorithm with Self-feedback Optimization of Dual Accumulation
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摘要: 针对3维微弱多目标检测问题,该文提出一种双重积累自反馈优化的3级平行线坐标变换(PT)检测前跟踪(TBD)算法。通过将平行线坐标变换引入至TBD技术,依次在规格化的径向距离-时间、方位角-时间和俯仰角-时间平面对量测点进行投影变换和双重非相参积累,同时利用功率累积结果反馈优化二值积累,有效缓解强目标淹没弱目标和编队目标串扰问题。仿真结果表明,当整体信杂比达到10 dB时,所提算法的全局检测概率接近80%,证明了该算法的有效性。Abstract: Considering the problem of 3D weak multi target detection, a 3-level Parallel-line-coordinate Transformation (PT) Track Before Detect (TBD) algorithm based on the dual accumulation self-feedback optimized is proposed in this paper. By introducing PT into TBD technology, the measurement points are transformed and accumulated sequentially on the normalized radial distance-time, azimuth angle-time and elevation angle-time planes, then the power accumulation are used to feedback the optimized binary accumulation, effectively mitigating the mutual interference between strong targets overwhelming weak targets and formation targets. Simulation results show that when the overall signal-to-clutter ratio reaches 10 dB, the overall detection probability of the proposed algorithm is close to 80%, demonstrating the effectiveness of the algorithm.
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表 1 目标参数
序号 初始位置(km) 初始速度(m/s) 加速度(m/s2) RCS(m2) 信杂比(dB) 1 $ \left({15,25},{5}\right) $ $\left( {{{180, - 20,5}}} \right)$ $\left( {{{0,0,0}}} \right)$ ${{0}}{{.2}}$ ${{10}}{{.2}}$ 2 $ \left({13,18},{7}{.5}\right) $ $\left( {{{180, - 200, - 10}}} \right)$ $\left( {{{2,1}}{{.5,0}}} \right)$ ${{0}}{{.15}}$ ${{13}}{{.2}}$ 3 $ \left({25,17},{4}\right) $ $\left( {{{ - 30,200,12}}} \right)$ $\left( {{{ - 1,3,0}}} \right)$ ${{0}}{{.2}}$ ${{9}}{{.6}}$ 4 $ \left({18,19}{.5},{6}\right) $ $\left( {{{200,180,0}}} \right)$ $ \left( {{{0,0,0}}} \right) $ ${{0}}{{.1}}$ ${{8}}{{.5}}$ 5 $ \left({18,20},{6}\right) $ $\left( {{{200,180,0}}} \right)$ $\left( {{{0,0,0}}} \right)$ ${{0}}{{.1}}$ ${{8}}{{.0}}$ 6 $ \left({18,20}{.5},{6}\right) $ $\left( {{{200,180,0}}} \right)$ $\left( {{{0,0,0}}} \right)$ ${{0}}{{.1}}$ ${{7}}{{.7}}$ 表 2 算法运行时间随杂波密度变化
杂波密度 30 60 90 120 150 时间(s) 11.0 16.4 26.4 37.3 46.9 杂波密度 180 210 240 270 300 时间(s) 53.8 59.6 68.7 75.2 80.2 -
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