Using FMCW Doppler Radar to Detect Targets up to the Maximum Unambiguous Range
Using FMCW Doppler Radar to Detect Targets up to the Maximum Unambiguous Range
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DOI：
10.1109/lgrs.2016.2640954
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发表时间：
2017-03-01
影响因子：
4.8
通讯作者：
Baldi, Chad
中科院分区：
文献类型：
--
作者：
Cooper, Ken B.;Durden, Stephen L.;Baldi, Chad
文献中描述的调频连续波雷达的大多数应用涉及相对靠近雷达的目标。在这些情况下，目标雷达特征信号的往返行程时间相对于发射啁啾持续时间较小，从而简化了距离和速度提取所需的处理。对于更远的目标，情况并非如此，其中大部分雷达特征是在随后的发射波形开始之后接收的。在这封信中，我们研究了各种信号处理方案，以应对这种长期的条件。我们分析演示了如何保留距离和多普勒频移信息的任意数量的目标间隔的任何地方从非常接近的目标雷达的明确的范围。这项工作的动机是开发一个95 GHz的多普勒雷达，用于测量彗星喷流中的冰和尘埃粒子动态。仿真和实验结果验证了我们的方法。
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.