Enhanced performance of spatial modulation with angular diversity receiver for indoor visible light communication

2016 ◽  
Author(s):  
Boyuan Zhuang ◽  
Chao Li ◽  
Zhengyuan Xu
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Spatial Modulation ◽  
Angular Diversity ◽  
Diversity Receiver

scholarly journals An Efficient Data Transmission with GSM-MPAPM Modulation for an Indoor VLC System

Symmetry ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1232 ◽  
Author(s):  
Bao ◽  
Hsu ◽  
Tu
Keyword(s):  
Visible Light ◽  
Short Distance ◽  
Pulse Width Modulation ◽  
Pulse Amplitude ◽  
Visible Light Communication ◽  
Spatial Modulation ◽  
Theoretical Scheme ◽  
Error Ratio ◽  
Bit Error Ratio ◽  
Dimming Control

As an emerging wireless communication technique, visible light communication is experiencing a boom in the global communication field, and the dream of accessing to the Internet with light is fast becoming a reality. The objective of this study was to put forward an efficient and theoretical scheme that is based on generalized spatial modulation to reduce the bit error ratio in indoor short-distance visible light communication. The scheme was implemented while using two steps in parallel: (1) The multi-pulse amplitude and the position modulation signal were generated by combining multi-pulse amplitude modulation with multi-pulse position modulation using transmitted information, and (2) certain light-emitting diodes were activated by employing the idea of generalized spatial modulation to convey the generated multi-pulse amplitude and position modulation optical signals. Furthermore, pulse width modulation was introduced to achieve dimming control in order to improve anti-interference ability to the ambient light of the system. The two steps above involved the information theory of communication. An embedded hardware system, which was based on the C8051F330 microcomputer and included a transmitter and a receiver, was designed to verify the performance of this new scheme. Subsequently, the verifiability experiment was carried out. The results of this experiment demonstrated that the proposed theoretical scheme of transmission was feasible and could lower the bit error ratio (BER) in indoor short-distance visible light communication while guaranteeing indoor light quality.

scholarly journals Study of Cooperative Strategy Based on Space–Time Labeling Diversity in Indoor Visible Light Communication Systems

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 702
Author(s):  
Jing-Jing Bao ◽  
Qiang Mai ◽  
Jih-Fu Tu
Keyword(s):  
Visible Light ◽  
Communication System ◽  
Communication Systems ◽  
High Reliability ◽  
Visible Light Communication ◽  
Space Time ◽  
Cooperative Transmission ◽  
Spatial Modulation ◽  
Cooperative Strategy ◽  
Large Channel

As an emerging technique of wireless communication, visible light communication is experiencing a boom in the global communications field, and the dream of accessing the Internet with light is fast becoming a reality. Multiple input multiple output, which is a key technique in radio frequency communication, can multiply channel capacity. However, it suffers the trouble of too large channel correlation when directly applied to visible light communication. The aims of this paper were to investigate spatial modulation and cooperative communication, then put forward a cooperative strategy based on space–time labeling diversity for indoor visible light communication systems to achieve high reliability. This scheme was conceived in two steps: (1) a cooperative indoor visible light communication system with a source luminaire, a relay luminaire, and a destination receiver was set up by employing the idea of cooperative transmission. Relative to the destination receiver, these two luminaires can be symmetric or asymmetric in geographical distribution. (2) Space–time labeling diversity of the constellations at the source luminaire was re-adjusted at the relay luminaire to enlarge the product of the distance of corresponding points on both constellations and was introduced on the basis of spatial modulation. Furthermore, total bit error ratio of the proposed cooperative indoor visible light communication system was derived. This scheme was implemented through Monte Carlo simulation. Evaluations of performance demonstrated the superiority of the cooperative strategy based on space–time labeling diversity over conventional optical transmission schemes. The presented approach in this paper could be of some value and interest to those who are working on visible light communication devices.

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