On Crop Canopy Scattering for Integrated mmWave Sensing and Communication in Agricultural Fields
On Crop Canopy Scattering for Integrated mmWave Sensing and Communication in Agricultural Fields
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DOI：
10.1109/mass58611.2023.00018
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发表时间：
2023-09
期刊：
影响因子：
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通讯作者：
Shuai Nie;Yufeng Ge;M. Vuran
中科院分区：
文献类型：
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作者：
Shuai Nie;Yufeng Ge;M. Vuran
毫米波（mmWave）频谱提供了宽带宽资源，有望在农业领域实现高吞吐量的无线通信。由于该频带处的波长相对较小，当在作物冠层上方建立无线链路时，毫米波信号往往会被散射。然而，很少有人知道的散射效应所造成的作物冠层在毫米波。在这项工作中，毫米波频谱中的散射损失被量化为由叶面积指数表示的不同作物冠层状态。特别是，一种基于瑞利粗糙度准则的方法，再加上冠层高度统计，计算散射损失。该模型的结果与2021年夏季进行的农业田间试验收集的经验数据吻合良好。结果表明，随着作物成熟度的增加，叶面积指数减小，散射损失也随之减小。这是第一项说明使用毫米波通信链路对叶面积指数进行感测的可行性的工作，叶面积指数是估计作物状况的关键指标。
Millimeter-wave (mmWave) spectrum offers wide bandwidth resources that are promising to realize high-throughput wireless communications in agricultural fields. Due to the relatively small wavelength at this frequency band, mmWave signals tend to be scattered when the wireless link is established above the crop canopy. However, little is known about the scattering effect caused by crop canopy at mmWave. In this work, the scattering loss in the mmWave spectrum is quantified for different crop canopy states that are represented by the leaf area index. In particular, an approach based on a Rayleigh roughness criterion is utilized, coupled with canopy height statistics, to calculate the scattering loss. The results of the model agree well with empirical data collected from agricultural field experiments conducted in Summer 2021. The results demonstrate that as the leaf area index decreases with crop maturity, the scattering loss also decreases. This is the first work that illustrates the feasibility of using the mmWave communication links to perform sensing on the leaf area index, which is a critical metric in estimating crop conditions.