针对发射场单脉冲雷达的非合作弱目标检测与跟踪问题,设计实现了一种利用恒虚警率原理计算粒子权值的粒子滤波检测前跟踪方法。蒙特卡洛仿真实验表明,对于宽度为0. 8 μs的发射信号,该方法在信噪比大于0 dB时,能保证95%的跟踪距离误差小于6 m、速度误差小于15 m/ s。雷达实测数据实验表明,该方法可以实现对非合作弱目标的稳定跟踪,且探测距离至少提高到原来的2倍以上。

To improve the non-cooperative weak targets detecting and tracking of monopulse radar in space aircraft launch site, a particle filter track-before-detect method with CFAR based particle weighting is proposed in this paper. The Monte Carlo simulation experiment shows that the method can provide 95% tracking with distance error less than 6 m and velocity error less than 15 m/ s,as to a emitted signal of 0. 8 μs width. And the experiment of real data shows that the method can track non-cooperative weak target stably, and the detection range can be doubled at least.

TN957