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随着通信领域的发展,可见光通信(VLC)开始扮演着越来越重要的角色,并且有关光学摄像机通信的研究越来越多,它是使用图像传感器来接收LED调制数据。然而,光学成像系统的传输速率很低,摆在研究人员面前重要的课题是即使使用普通商用摄像机(30帧/s),如何提高系统数据传输速率。视觉MIMO(Visual Multiple-Input Multiple-Output)是一个有潜力的解决方案。研究人员已经提出了许多编码方案来匹配视觉MIMO系统。本文综述一些新颖而可行的调制方案,为视觉MIMO提高传输速率的后续研究做铺垫。
With the development of the communication field, visible light communication (VLC) is beginning to play an increasingly important role. And more and more researches on the optical camera communication are using the image sensor to receive the LED modulation data. However, the transmission rate of the optical imaging system is very low, and an important issue before the researchers is how to increase the system data transmission rate even when using a common commercial video camera (30 frames / s). Visual Multiple-Input Multiple-Output (MIMO) is a potential solution. Researchers have proposed many coding schemes to match the visual MIMO system. This paper reviews some novel and feasible modulation schemes, paving the way for the follow-up study on the improvement of transmission rate in visual MIMO.