Bio-inspired processing of radar target echoes
Bio-inspired processing of radar target echoes
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DOI：
10.1049/iet-rsn.2018.5241
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发表时间：
2018-12-01
影响因子：
1.7
通讯作者：
Holderied, Marc W.
中科院分区：
文献类型：
--
作者：
Georgiev, Krasin;Balleri, Alessio;Holderied, Marc W.
回声定位蝙蝠已经进化出使用生物声纳在极具挑战性的环境中探测、分辨和区分目标的能力。蝙蝠在接收听觉系统中处理信号的方式与雷达和声纳不同，因此研究它们的差异和相似之处可能会为改进合成传感器提供有用的经验。频谱图相关和转换（SCAT）接收器是一种现有的蝙蝠听觉系统模型，它考虑了蝙蝠发出宽带信号的生理和神经组织。在这项研究中，作者提出了一种相当于SCAT的基带接收器，可以分析基带的目标回波。利用基带SCAT （BSCT）研究了蝙蝠听觉模型对两个紧密间隔散射体的输出，分析了距离分辨率性能，并与传统匹配滤波器进行了比较。结果首先表明，BSCT提高了图像的分辨率。然后证明了BSCT的输出可以用等效的基于匹配滤波器的接收器获得。在高信噪比的无线电频率下，通过一组实验室实验对结果进行了验证。
Echolocating bats have evolved the ability to detect, resolve and discriminate targets in highly challenging environments using biological sonar. The way bats process signals in the receiving auditory system is not the same as that of radar and sonar and hence investigating differences and similarities might provide useful lessons to improve synthetic sensors. The Spectrogram Correlation And Transformation (SCAT) receiver is an existing model of the bat auditory system that takes into account the physiology and the neural organisation of bats that emit broadband signals. In this study, the authors present a baseband receiver equivalent to the SCAT that allows an analysis of target echoes at baseband. The baseband SCAT (BSCT) is used to investigate the output of the bat-auditory model for two closely spaced scatterers and to carry out an analysis of range resolution performance and a comparison with the conventional matched filter. Results firstly show that the BSCT provides improved resolution performance. It is then demonstrated that the output of the BSCT can be obtained with an equivalent matched-filter based receiver. The results are verified with a set of laboratory experiments at radio frequencies in a high signal-to-noise ratio.