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Asynchronous Code Division Multiplexing-Based Visible Light Positioning and Communication Network Using Successive

Zhongxu Liu1, Xiaodi You2, Changyuan Yu1

  • 1Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong 999077, China.

Sensors (Basel, Switzerland)
|September 14, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for visible light positioning and communication (VLPC) networks. It significantly improves data accuracy and positioning in asynchronous systems.

Keywords:
asynchronous code division multiplexing (ACDM)successive interference cancellation decoding (SICD)visible light positioning (VLP)visible light positioning and communication (VLPC)

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Area of Science:

  • Wireless Communication
  • Optical Technologies

Background:

  • Visible Light Positioning and Communication (VLPC) integrates visible light communication (VLC) and visible light positioning (VLP).
  • Asynchronous Code Division Multiplexing (ACDM) presents challenges in VLPC network performance.

Purpose of the Study:

  • To enhance data transmission quality and positioning accuracy in asynchronous VLPC networks.
  • To address the limitations of existing ACDM techniques in VLPC systems.

Main Methods:

  • Proposed an orthogonal pseudo-random code (OPRC) to maintain signal orthogonality in asynchronous VLP systems.
  • Developed an enhanced ACDM-based VLPC system combining OPRC with successive interference cancellation decoding (SICD).

Main Results:

  • OPRC achieved sub-centimeter average positioning errors by preserving signal orthogonality.
  • The SICD-OPRC scheme significantly reduced bit-error rate (BER) to 4.3 × 10-4 and average positioning error (PE) to 2.7 cm.
  • The proposed scheme demonstrated performance close to synchronized VLPC systems in complex asynchronous scenarios.

Conclusions:

  • The SICD-OPRC scheme offers a robust solution for improving VLPC performance in asynchronous environments.
  • This advancement is crucial for the development of next-generation wireless communication systems.