1. September 2009doc.: IEEE 802.15-12-0278-00-wng0
<month year>
4/20/2019<month year>
doc.: IEEE
March 2015
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Interference Issues of Visible Light Communications]
Date Submitted: [March, 2015]
Source: [Chen Gong, Qian Gao, and Zhengyuan Xu]
[University of Science and Technology of China]
Address [University of Science and Technology of China, Hefei, Anhui, Korea]
Voice:[ ], FAX: [ ], [{cgong821,qgao,
Re: []
Abstract: [The interference issue for visible light communication is presented. Several solutions to either suppress the interference or cancel the interference are discussed.]
Purpose: [Contribution to IEEE SG7 VLC]
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
Gong, Gao, Zu (USTC)
<author>, <company>

2. VLC with Multiple Transmitting LED
March 2015
VLC with Multiple Transmitting LED
TX1
TX2
TX3
Signal
Signal
Signal
Interference
RX1
RX2
Multi-transmitter multi-receiver indoor visible light communication network
Gong, Gao, Zu (USTC)

3. The Interference Issue
March 2015
The Interference Issue
Performance degradation due to the interference:
Received signal quality degradation
Achievable rate decrease
Need to find a solution for the interference management
Gong, Gao, Zu (USTC)

4. Interference Suppression at the Transmitter
March 2015
Interference Suppression at the Transmitter
Add almost blank frame into the transmission signal
reduce the rate of the interfering user
reduce the performance degradation due to the interference
interference
signal
Interfering TX
Desired TX
all subframe with data RX
almost blank subframe,
interference suppression
Gong, Gao, Zu (USTC)

5. Layered Transmission with Interference Cancellation
March 2015
Layered Transmission with Interference Cancellation
Receiver 3
(1, 1)
(1, 1)
(1, 1)
(1, 1)
(1, 2)
(1, 2)
Decode (2,1), (3,2)
Decode
(1,2), (4,1)
Decode
(3,1)
(2, 1)
(3, 1)
(3, 1)
(3, 1)
(3, 2)
(4, 1)
(4, 1)
Layered transmission at the transmitter
Successive decoding at the receiver
Gong, Gao, Zu (USTC)

6. Conclusion Multi-user visible light communication system
March 2015
Conclusion
Multi-user visible light communication system
Interference issue due to the multi-user transmission
Interference suppression at the transmitter
Layer transmission with interference cancellation
Gong, Gao, Zu (USTC)