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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Using FMCW Doppler Radar to Detect Targets up to the Maximum Unambiguous Range
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Using FMCW Doppler Radar to Detect Targets up to the Maximum Unambiguous Range

机译：使用FMCW多普勒雷达检测到最大明确范围的目标

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摘要

Most applications of frequency-modulated continuous-wave radar described in the literature involve targets that are in relatively close proximity to the radar. In these cases, the round-trip travel time of the target’s radar signature is small relative to the transmit chirp duration, simplifying the processing required for range and velocity extraction. This is not the case for more distant targets, where much of the radar signature is received after the start of the subsequent transmit waveform. In this letter, we examine various signal-processing options for coping with this long-range condition. We analytically demonstrate how to retain both range and Doppler shift information for an arbitrary number of targets spaced anywhere from very near the target up to the radar’s unambiguous range. The motivation for this work is to develop a 95-GHz Doppler radar for measuring ice and dust particle dynamics in cometary jets. Simulations and experimental results are provided to validate our methods.
机译：文献中描述的调频连续波雷达的大多数应用都涉及相对靠近雷达的目标。在这些情况下，目标雷达信号的往返行程时间相对于发射chi持续时间而言较小，从而简化了距离和速度提取所需的处理。对于较远的目标则不是这种情况，因为在随后的发射波形开始之后，很多雷达信号都被接收了。在这封信中，我们研究了应对这种远程条件的各种信号处理选项。我们分析性地演示了如何为距离非常近的目标到雷达的明确范围之间任意距离的任意数量的目标保留距离和多普勒频移信息。这项工作的动机是开发一种用于测量彗星喷气机中冰和尘埃粒子动力学的95 GHz多普勒雷达。提供仿真和实验结果以验证我们的方法。

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