Inverse Synthetic Aperture Secondary Radar Concept for Precise Wireless Positioning
Inverse Synthetic Aperture Secondary Radar Concept for Precise Wireless Positioning
复制标题
用于精确无线定位的逆合成孔径二次雷达概念
DOI：
10.1109/tmtt.2007.908668
复制
发表时间：
2007
影响因子：
4.3
通讯作者：
P. Gulden
中科院分区：
文献类型：
--
作者：
Martin Vossiek;Alexander Urban;S. Max;P. Gulden
介绍了一种新的逆合成孔径二次雷达无线定位技术。所提出的概念允许一个精确的空间定位的反向散射转发器，即使在密集的多径环境。一种新的二次雷达信号评估概念补偿了返回信号的未知调制相位，从而导致雷达信号与普通一次雷达相当。利用这一概念，逆合成孔径雷达算法可以应用于后向散射转发器系统的信号。在模拟和第一次实验中，我们使用宽带全息重建原理来实现逆合成孔径方法。应答器沿着短的任意孔径路径的运动是通过辅助相对传感器（航位推算或惯性传感器）来确定的。沿孔径沿着测量的一组信号自适应地聚焦到应答器位置。通过这种聚焦技术，多径反射可以被抑制令人印象深刻的和精确的室内定位成为可能。利用我们的技术，现在可以在RF识别系统和无线本地定位系统中实现全新的强大的集成导航和传感器融合选项。
In this paper, the novel inverse synthetic aperture secondary radar wireless positioning technique is introduced. The proposed concept allows for a precise spatial localization of a backscatter transponder even in dense multipath environments. A novel secondary radar signal evaluation concept compensates for the unknown modulation phase of the returned signal and thus leads to radar signals comparable to common primary radar. With use of this concept, inverse synthetic aperture radar algorithms can be applied to the signals of backscatter transponder systems. In simulations and first experiments, we used a broadband holographic reconstruction principle to realize the inverse synthetic aperture approach. The movement of the transponder along a short arbitrary aperture path is determined with assisting relative sensors (dead reckoning or inertia sensors). A set of signals measured along the aperture is adaptively focused to the transponder position. By this focusing technique, multipath reflections can be suppressed impressively and a precise indoor positioning becomes feasible. With our technique, completely new and powerful options for integrated navigation and sensor fusion in RF identification systems and wireless local positioning systems are now possible.