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：

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

页码：152 / 157

页数：6