论文标题
Bistatic海洋学高频雷达的自校准和天线组
Self-calibration and antenna grouping for bistatic oceanographic High-Frequency Radars
论文作者
论文摘要
我们提出了两个概念，用于通过Bistatic海洋学高频雷达显着改善表面电流映射。这些改善与线性或准线性天线阵列的雷达数据的方位角处理有关。第一个想法是利用远程发射器，根据对直接路径中接收的信号的分析对接收天线的复杂收益进行自动校正。该直接信号可以在范围多普勒表示中的零多普勒和最小范围单元格中找到。我们将这种调整称为接收阵列的“自我校准”，因为它可以实时执行，而无需操作员的任何特定操作。第二个想法在于应用方向查找技术（而不是传统的光束形成）不仅在整个天线上，还将其用于由较小数量的顺序天线制成的子阵列，这是一种我们称为“天线分组”的方法。自我校准和天线分组的结合使得获得具有完整覆盖范围的高分辨率图成为可能，从而结合了方向查找的各个优点和束形成技术。另外，该方法对于阵列中缺少天线的方法很健壮。这些技术应用于图伦的多和高频雷达网络并说明。
We propose two concepts for the significant improvement of surface current mapping with bistatic oceanographic High-Frequency Radars. These ameliorations pertain to the azimuthal processing of radar data with linear or quasi-linear antenna arrays. The first idea is to take advantage of the remote transmitter to perform an automatic correction of the complex gains of the receiving antennas based on the analysis of the signal received in the direct path. This direct signal can be found at the zero-Doppler and minimal range cell in the Range-Doppler representation. We term this adjustment as "self-calibration" of the receiving array, as it can be performed in real-time without any specific action from the operator. The second idea consists in applying a Direction Finding technique (instead of traditional Beam Forming) not only to the full array of antenna but also to subarrays made of a smaller number of sequential antennas, a method which we refer to as "antenna grouping". The combination of self-calibration and antenna grouping makes it possible to obtain high-resolution maps with full coverage, thereby combining the respective merits of Direction Finding and Beam Forming techniques. In addition the method is found robust to missing antennas in the array. These techniques are applied to and illustrated with the multistatic High-Frequency Radar network in Toulon.
