This letter focuses on ship target localization using a multistatic passive radar system based on navigation satellites opportunistic illuminators. In such systems, the typical approach to localize the target is taking peripheral decisions at each bistatic channel to detect the target followed by bistatic ranges intersection. In contrast, here we consider a centralized approach in order to jointly detect and localize the ship target of interest. The proposed approach entirely operates in a Cartesian plane representing the surveyed maritime area, and it is able to combine the signals pertaining the different bistatic links despite the variation of the e.m. response of the targets, typically occurring in the framework under consideration as the target is illuminated by multiple (and possibly widely separated) transmitters viewing angles. Moreover, the hypothesis of point-like targets is here replaced with the more realistic case of extended targets (i.e., occupying more than one resolution cell). The ship localization effectiveness of the method is proven via both synthetic and experimental datasets.

中文翻译：

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基于导航卫星的无源多基地雷达集中船舶定位策略


这封信的重点是使用基于导航卫星机会照明器的多基地无源雷达系统进行船舶目标定位。在此类系统中，定位目标的典型方法是在每个双基地通道处采取外围决策来检测目标，然后进行双基地范围交叉。相比之下，这里我们考虑采用集中式方法来联合检测和定位感兴趣的船舶目标。所提出的方法完全在代表被测海域的笛卡尔平面上运行，并且能够组合与不同双基地链路有关的信号，尽管目标的电磁响应发生变化，通常发生在所考虑的框架中，因为目标是由多个（可能是相距很远的）发射器视角照明。此外，点状目标的假设在这里被替换为扩展目标的更现实的情况（即，占据多个分辨率单元）。该方法的船舶定位有效性通过合成和实验数据集得到证明。