一种改进的多普勒盲区条件下的航迹撤销准则

An Improved track deletion criterion for Doppler blind zone

针对机载预警雷达固有的多普勒盲区造成目标点迹连续丢失问题,用传统基于航迹似然比和序列概率比检验(TLR-SPRT)撤销准则处理容易引起航迹中断和频繁起批.为此提出了一种多普勒盲区条件下的改进航迹撤销准则.该准则将多普勒盲区和检测概率小于1均作为雷达无量测值的原因,并利用多普勒盲区发生的概率与检测概率联合推导出新的目标航迹质量分数增量.仿真结果表明,与传统TLR-SPRT撤销准则相比,改进航迹撤销准则在多普勒盲区条件下可明显降低航迹中断概率,较好地保持了目标航迹连续性.

The inherent Doppler blind zone (DBZ) of airborne early warning radar brings about continuous loss of target trace, and a traditional track deletion criterion based on track likelihood ratio and sequence probability ratio test (TLR-SPRT) is liable to interruption and frequent batch initiation of target track. To solve the problem above, this paper proposes an improved track deletion criterion for DBZ. In the new criterion, the DBZ and detection probability below 1 are both viewed as the reason for radar measurement loss, and the incidence probability of DBZ and detection probability are jointly used to deduce new increment of track quality score. The simulation results show that compared with the traditional TLR-SPRT deletion criterion, the improved track deletion criterion significantly reduces the probability of track interruption under the condition of DBZ, which maintains target track continuity well.