杂波图检测在外辐射源雷达中的应用研究

Application of Clutter Map Detection in Passive Radar

目标恒虚警率检测的主要步骤之一,是估计杂波平均功率水平,可采用空域方法或杂波图方法。外辐射源雷达目标检测通常采用空域方法估计杂波功率水平,仅利用了当前扫描帧测量数据,限制了目标检测性能的提升。外辐射源雷达杂波干扰严重,可考虑采用杂波图检测方法,即利用多次扫描帧测量数据形成杂波功率水平估计。针对外辐射源雷达的信号处理流程和数据结构,分析和比较了空域方法和杂波图方法的工作原理、检测性能和计算性能。实测数据处理结果表明,相对于常用的空域方法,杂波图方法有望进一步提升外辐射源雷达目标检测性能。

One of the main steps in target constant false alarm rate detection is to estimate the average power level of the clutter, using the spatial method or the clutter map method. Target detection in passive radar usually uses the spatial method to estimate the clutter power level, using only the current scanning frame measurement data, which limits the improvement of target detection performance. The clutter interference in passive radar is serious, and the clutter map method can be adopted, that is, the clutter power level estimation is formed by using multiple scanning frame measurement data. The working principles, detection performances and calculation performances of the spatial method and the clutter map method were analyzed and compared for the signal processing flow and data structure of the passive radar. The results of the measured data show that the clutter map method is expected to further improve the passive radar target detection performance compared with the commonly used spatial method.