Vehicle-to-vehicle (V2V) communications are one of the most promising 6G scenarios. However, V2V communications demand high data rates and extremely low-latency requirements that are difficult to satisfy nowadays. Recently, vehicular visible light communications (V-VLC) have been proposed as a promising technology to guarantee such requirements. Multiple-input, multiple-output (MIMO) techniques can potentially achieve high data rates. However, when applied to V-VLC, they confront challenges such as the latency because of the need for closed-loop transmission or the correlation among optical channel responses. This article explains the use of blind interference alignment (BIA) for V-VLC based on the concept of a reconfigurable photodetector to provide linearly independent channel responses. It is shown that BIA solves the issues of MIMO techniques and may comply with the 6G V-VLC requirements. Besides, the vehicles are a convenient platform for implementing a reconfigurable photodetector. Finally, the open issues for BIA implementation in V-VLC are discussed to inspire future research.

中文翻译：

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车辆可见光通信的光对准：高数据速率和低延迟车辆可见光通信实现盲干扰对准


车对车（V2V）通信是最有前途的 6G 场景之一。然而，V2V通信需要高数据速率和极低延迟的要求，目前很难满足。最近，车载可见光通信（V-VLC）被提出作为一种有前景的技术来满足这些要求。多输入多输出 (MIMO) 技术有可能实现高数据速率。然而，当应用于V-VLC时，由于需要闭环传输或光通道响应之间的相关性，它们面临诸如延迟等挑战。本文介绍了基于可重构光电探测器概念的 V-VLC 盲干扰对准 (BIA) 的使用，以提供线性独立的通道响应。结果表明，BIA解决了MIMO技术的问题，并且可以满足6G V-VLC的要求。此外，这些车辆是实现可重构光电探测器的便捷平台。最后，讨论了 V-VLC 中 BIA 实施的未决问题，以启发未来的研究。