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针对 2维测量和 4 -sigma确认门 ,把先验检测门限优化准则和修正 Riccati方程的解析近似表示相结合 ,得到了在瑞利起伏环境下使跟踪性能优化的信号探测阈值解析表示式 ,从而使在线求解自适应信号探测阈值能比较容易地实现。通过研究和仿真发现 :在滤波稳定阶段 ,本文给出的自适应信号检测门限方法的跟踪性能优于固定虚警率方法的跟踪性能 ;基于先验检测门限优化准则实现检测 -跟踪的联合优化要求信噪比要大于一定的门限 ,在瑞利起伏环境下 ,对 2维测量和 4 -sigma确认门 ,该门限为 1 .57
Aiming at 2-D measurement and 4-sigma confirmation gate, the primal detection threshold optimization criterion is combined with the analytic approximate representation of the modified Riccati equation to obtain the signal detection threshold analytical expression that optimizes the tracking performance in Rayleigh undulation It is relatively easy to make the online detection of adaptive signal detection threshold. Through the research and simulation, it is found that the tracking performance of adaptive signal detection threshold method given in this paper is better than that of the fixed false alarm rate method in the phase of filter stabilization. The joint optimization requirement of detection-tracking based on the prior detection threshold optimization criterion The signal-to-noise ratio is greater than a certain threshold, which is 1.57 for 2-dimensional measurements and 4-sigma confirmation gates under Rayleigh fluctuations