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Multi-level modulation scheme based on PAK algorithm for optical camera communications
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Department of Communications Engineering, Jilin University, Changchun 130012, China

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    Abstract:

    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.

    Reference
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WU Jing, CHI Xuefen, JI Fenglei, JIANG Keyu, CHEN Shaoqi, LI Shuai. Multi-level modulation scheme based on PAK algorithm for optical camera communications[J]. Optoelectronics Letters,2022,18(3):152-157

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History
  • Received:May 29,2021
  • Revised:August 10,2021
  • Online: April 27,2022
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