双频雷达动目标近场定位算法

利用双频雷达对运动目标进行定位现已受到广泛关注。虽然已有文献对双频雷达进行了一些研究，但这些方法都是基于远场假设的。因此，提出了一种简单的基于菲涅耳模型的利用单站双频雷达进行近场定位的新方法。有别于现有方法需要联合搜索或者需要复杂的矩阵运算，该方法仅使用简单的代数运算就能提供闭式解，可直接应用于低成本的嵌入式设备。此外，推导了单站双频雷达定位问题的克拉美罗下界（CRLB），为性能评估提供了基准。仿真结果验证了该方法的有效性。

A Near Field Location Algorithm of Moving Target Based on Single Station Dual Frequency Radar

Localization of a moving target using dual frequency radar has now gained considerable attention. Although several studies for dual frequency radar are addressed in the literatures, those methods are based on far-field assumption. In this paper, a novel and simple method based on Fresnel model is proposed for near-field localization using single station dual frequency radar. Rather than joint search or complex matrix operations, the proposed method can provide a closed-form solution only using simple algebraic manipulations. In addition, the Cramer-Rao lower bound (CRLB) is derived to provide a benchmark for performance evaluation. The simulation results prove the proposed method.