Multi-level modulation scheme based on PAK algorithm for optical camera communications

被引：1
|
作者：
Wu Jing [1 ]
Chi Xuefen [1 ]
Ji Fenglei [1 ]
Jiang Keyu [1 ]
Chen Shaoqi [1 ]
Li Shuai [1 ]
机构：
[1] Jilin Univ, Dept Commun Engn, Changchun 130012, Peoples R China
来源：
OPTOELECTRONICS LETTERS | 2022年 / 18卷 / 03期
关键词：
A;
D O I：
10.1007/s11801-022-1089-7
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In an optical camera communication (OCC) system, multi-level modulation is essential for data rate enhancement with the finite frame rate of the receiving camera constraint, where the K-means algorithm is widely used as a thresholding scheme. The result of K-means clustering is sensitive to initial cluster centers. In this paper, we propose a multi-level modulation scheme utilizing the pilot-aided K-means (PAK) algorithm. PAK algorithm innovates in both obtaining the state of the stripes propagated through the optical channel under different environments and overcoming the susceptibility of K-means. Our scheme could prompt data rate and improve the performance of OCC. Finally, non-orthogonal multiple access (NOMA) pattern is designed based on the proposed scheme to achieve multiplex communications.
引用
收藏
页码：152 / 157
页数：6
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