2  ×  2 multiple-input multiple-output optical–wireless integration system based on optical independent-sideband modulation enabled by an in-phase/quadrature modulator

2016 ◽  
Vol 41 (13) ◽  
pp. 3138 ◽  
Author(s):  
Xinying Li ◽  
Jianjun Yu
Keyword(s):  
Multiple Input Multiple Output ◽  
Optical Wireless ◽  
Integration System ◽  
Multiple Input ◽  
Quadrature Modulator ◽  
Input Multiple Output

scholarly journals Networked multiple-input-multiple-output for optical wireless communication systems

2020 ◽  
Vol 378 (2169) ◽  
pp. 20190189 ◽  
Author(s):  
Zhaocheng Wang ◽  
Jiaxuan Chen
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Multiple Input Multiple Output ◽  
Optical Devices ◽  
Heterogeneous Data ◽  
Spatial Multiplexing ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Multiple Input ◽  
Input Multiple Output

With the escalation of heterogeneous data traffic, the research on optical wireless communication (OWC) has attracted much attention, owing to its advantages such as wide spectrum, low power consumption and high security. Ubiquitous optical devices, e.g. light-emitting diodes (LEDs) and cameras, are employed to support optical wireless links. Since the distribution of these optical devices is usually dense, multiple-input-multiple-output (MIMO) can be naturally adopted to attain spatial diversity gain or spatial multiplexing gain. As the scale of OWC networks enlarges, optical MIMO can also collaborate with network-level operations, like user/AP grouping, to enhance the network throughput. Since OWC is preferred for short-range communications and is sensitive to the directions/rotations of transceivers, optical MIMO links vary frequently and sharply in outdoor scenarios when considering the mobility of optical devices, raising new challenges to network design. In this work, we present an overview of optical MIMO techniques, as well as the cooperation of MIMO and user/AP grouping in OWC networks. In consideration of the challenges for outdoor OWC, key technologies are then proposed to facilitate the adoption of optical MIMO in outdoor scenarios, especially in vehicular ad hoc networks. Lastly, future applications of MIMO in OWC networks are discussed. This article is part of the theme issue ‘Optical wireless communication’.

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