Optimal Power Allocation for Integrated Visible Light Positioning and Communication System with a Single LED-Lamp

Shuai Ma, Ruixin Yang, Bing Li, Yongyan Chen, Hang Li, Youlong Wu, Majid Safari, Shiyin Li, Naofal Al-Dhahir

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we investigate an integrated visible light positioning and communication (VLPC) system with a single LED-lamp. First, by leveraging the fact that the VLC channel model is a function of the receiver’s location, we propose a system model that estimates the channel state information (CSI) based on the positioning information without transmitting pilot sequences. Second, we derive the Cramer-Rao lower bound (CRLB) on the positioning error variance and a lower bound on the achievable rate with on-off keying modulation. Third, based on the derived performance metrics, we optimize the power allocation to minimize the CRLB, while satisfying the rate outage probability constraint. To tackle this non-convex optimization problem, we apply the worst-case distribution of the Conditional Value-at-Risk (CVaR) and the block coordinate descent (BCD) methods to obtain the feasible solutions. Finally, the effects of critical system parameters, such as outage probability, rate threshold, total power threshold, are revealed by numerical results.
Original languageEnglish
Pages (from-to)6734-6747
JournalIEEE Transactions on Communications
Volume70
Issue number10
Early online date8 Sep 2022
DOIs
Publication statusPublished - 1 Oct 2022

Keywords

  • Visible light communication
  • Resource management
  • Light emitting diodes
  • Wireless communication
  • Technological innovation
  • Probability
  • Power system reliability
  • visible light positioning
  • Cramer-Rao lower bound
  • power allocation

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