Spatial Modulation for Layered Space-Time Coding Used in Image-Sensor-Based Visible Light Communication

Keisuke MASUDA  Koji KAMAKURA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E100-B   No.6   pp.932-940
Publication Date: 2017/06/01
Online ISSN: 1745-1345
Type of Manuscript: Special Section PAPER (Special Section on Visible Light Communications in Conjunction with Topics of ICEVLC 2015)
Category: Wireless Communication Technologies
Keyword: 
spatial modulation,  space-time coding,  visible light communication,  layered STC,  image sensor,  

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Summary: 
Spatial modulation (SM) is introduced into layered space-time coding (L-STC) used in image sensor (IS)-based visible light communication (VLC) systems. STC was basically investigated for extending the communication range of the IS-based VLC link [10], although it is out of the range when IS receivers are at the long distance from the LED array of the transmitter where the number of pixels capturing the transmitter on the image plane is less than the number of LEDs of the array. Furthermore, L-STC was done in [11] for increasing the reception rate with improving the pixel resolution while the receiver was approaching the transmitter. In this paper, SM is combined into L-STC by mapping additional information bits on the location of the pair of STC bit matrices of each layer. Experimental results show that additional SM bits are extracted with no error, without deteriorating the reception quality of and shrinking the transmission range of the original L-STC.