This letter considers the wavenumber-division-multiplexing (WDM) scheme that was recently presented by Sanguinetti et al. (2022) line-of-sight communications between parallel (i.e., side-by-side) spatially-continuous electromagnetic segments. Our aim is to analyze the performance of WDM, combined with different digital processing architectures, when the electromagnetic segments have an arbitrary orientation and position. To this end, we first show how the general electromagnetic MIMO (multiple-input multiple-output) model from Sanguinetti et al. (2022) can be particularized to the case of interest and then use numerical results to evaluate the impact of geometric parameters (e.g., horizontal and vertical distances, azimuth and elevation orientations). It turns out that WDM performs satisfactorily also when the transmit and receive segments are not in boresight direction to each other.

中文翻译：

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WDM在任意方向和位置的LoS通信中的性能分析

这封信考虑了 Sanguinetti 最近提出的波数分割复用 (WDM) 方案等。(2022) 平行（即并排）空间连续电磁段之间的视距通信。我们的目标是分析 WDM 的性能，结合不同的数字处理架构，当电磁段具有任意方向和位置时。为此，我们首先展示了来自 Sanguinetti 的通用电磁 MIMO（多输入多输出）模型等。(2022) 可以具体到感兴趣的情况，然后使用数值结果来评估几何参数（例如，水平和垂直距离、方位角和仰角方向）的影响。事实证明，当发送和接收段彼此不在视轴方向时，WDM 也能令人满意地执行。