多预警机雷达信息融合的多普勒盲区目标检测

Blind Doppler Zone Target Detection Based on Multi-AEW Radar Information Fusion

预警机雷达采用脉冲多普勒体制,不可避免地存在多普勒盲区。在对空工作模式下,多普勒盲区会导致目标频繁暂消和重复起批。在深入分析预警机雷达多普勒盲区目标的检测问题的基础上,构建了基于多站信息融合的分布式恒虚警率目标检测器。通过理论推导确定了融合规则,给出了局部雷达全空时处理条件下的目标检测广义似然比和虚警门限。仿真结果表明,该方法能够显著提高对落入多普勒盲区内的目标点迹的检测概率,同时改善了目标航迹质量,具有一定的实际意义和应用价值。

Due to adopting Pulse Doppler system,blind Doppler zone exists inevitably in AEW Radar.In air surveillance mode,blind Doppler zone leads to frequent temporary disappear and iterative track initiation of target.Based on deliberate analysis of the blind Doppler zone target detection problem of AEW radar,a distributed constant false alarm rate（CFAR） target detector was conceived founding on multi-AEW radar information fusion.The fusion rule was confirmed via theory derivation.Then the generalized likelihood ratio of target detection and the false alarm threshold of local radar sensors were proposed on the condition of full space-time processing.Simulation results justify that the advanced technique can increase the detection probability of the target buried in blind Doppler zone dramatically.Meanwhile,it improves the quality of target track along with possesses a degree of practical significance and application value.