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Remote data sensing using SAR and harmonic reradiators

机译:使用SAR和谐波辐射器进行远程数据感应

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In sensor networks distributed over large areas, communication by means of active transmitters on sensor nodes is inherently energy expensive and poses a significant bottleneck to achieve a long battery life. We propose modulated reradiation of radar illumination as a means to transmit information from a group of sensors to an airborne radar. This puts the communications energy burden on the radar transmitter rather than on the sensor nodes, thus increasing their battery lifetimes. To distinguish the sensor return from the clutter return, the modulation on the sensors is done by switching a nonlinear load on the sensor antenna and processing the harmonic reradiation. We present techniques to transmit information from the sensors, which use stripmap mode synthetic aperture radar (SAR) ideas to decode the information and to simultaneously obtain a geographic map of the sensor locations.
机译:在分布在大面积上的传感器网络中,借助于传感器节点上的有源发射器进行的通信本质上是能源昂贵的,并且对于实现长电池寿命提出了重大的瓶颈。我们建议对雷达照明进行调制再辐射,以将信息从一组传感器传输到机载雷达。这将通信能量负担放到了雷达发射机上,而不是传感器节点上,从而延长了它们的电池寿命。为了区分传感器回波和杂波回波,通过切换传感器天线上的非线性负载并处理谐波辐射来完成传感器的调制。我们提出了从传感器传输信息的技术,这些技术使用带状图模式合成孔径雷达(SAR)的思想来解码信息并同时获得传感器位置的地理图。

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