|
|
Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2020 Vol.21 No.9 P.1397-1411
Code design for run-length control in visible light communication
Abstract: Run-length limited (RLL) codes can facilitate reliable data transmission and provide flicker-free illumination in visible light communication (VLC) systems. We propose novel high-rate RLL codes, which can improve error performance and mitigate flicker. Two RLL coding schemes are developed by designing the finite-state machine to further enhance the coding gain by improving the minimum Hamming distance and using the state-splitting method to realize small state numbers. In our RLL code design, the construction of the codeword set is critical. This codeword set is designed considering the set-partitioning algorithm criterion. The flicker control and minimum Hamming distance of the various proposed RLL codes are described in detail, and the flicker performances of different codes are compared based on histograms. Simulations are conducted to evaluate the proposed RLL codes in on-off keying modulation VLC systems. Simulation results demonstrate that the proposed RLL codes achieve superior error performance to the existing RLL codes.
Key words: Visible light communication, Run-length limited codes, Finite-state machine, Minimum Hamming distance
1中国矿业大学信息与控制工程学院，中国徐州市，221116
2悉尼科技大学电气与工程学院，澳大利亚悉尼市，2007
3江苏师范大学电气工程及自动化学院，中国徐州市，221116
摘要：在可见光通信系统中，游程长度受限码可用于促进可靠的数据传输并提供无闪烁照明。本文提出新颖的高码率游程长度受限码，以改善传输系统的误码率性能以及减少光信号闪烁。基于有限状态机设计原理，通过优化最小汉明距离和利用状态分裂法获取较小状态数，提出两种游程长度受限码编码方案以获得高编码增益。在游程长度受限码的编码设计方案中，码字集的构造至关重要；在码字集的设计中引入集合划分算法准则。详细描述各种游程长度受限码的闪烁特性和最小汉明距离，并基于直方图比较不同码字的闪烁性能。最后，基于开关键控调制的可见光通信系统对所提游程长度受限码作仿真验证及性能分析。仿真结果表明，与现有游程长度受限码相比，在闪烁控制约束下，所提游程长度受限码的误码性能更优。
关键词组：
References:
Open peer comments: Debate/Discuss/Question/Opinion
<1>
DOI:
10.1631/FITEE.1900526
CLC number:
TN911.22
Download Full Text:
Downloaded:
3187
Download summary:
<Click Here>Downloaded:
1421Clicked:
4999
Cited:
0
On-line Access:
2020-09-09
Received:
2019-09-26
Revision Accepted:
2020-03-30
Crosschecked:
2020-08-07