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

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...

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Bibliographic Details
Published inIEEE transactions on communications Vol. 70; no. 10; pp. 6734 - 6747
Main Authors Ma, Shuai, Yang, Ruixin, Li, Bing, Chen, Yongyan, Li, Hang, Wu, Youlong, Safari, Majid, Li, Shiyin, Al-Dhahirxs, Naofal
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Communications systems
Convexity
Cramer-Rao bounds
Cramer-Rao lower bound
Light emitting diodes
Lower bounds
On-Off Keying
Optimization
Outages
Performance measurement
power allocation
Power system reliability
Probability
Resource management
Technological innovation
Visible light communication
visible light positioning
Wireless communication
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Summary: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.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2022.3204659