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Transmit Power Control Game With a Sum Power Constraint in Cell-Free Massive MIMO Downlink
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- Authors
- Jungho Myung, Keunyoung Kim, Young-Jo Ko
- Issue Date
- 2022-03
- Citation
- IEEE Wireless Communications Letters, v.11, no.3, pp.632-635
- ISSN
- 2162-2337
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Project Code
- 21HH1800, Speciality Laboratory for Wireless Backhaul Communications based on Very High Frequency, Ko Young Jo
- Abstract
- We propose a transmit power control game, where we assume that distributed access points are rational, i.e., they will determine the transmit power to maximize their own utility functions. The utility function of each AP is defined as the estimated downlink sum-rate minus a linear price function of the transmit power. The existence of the Nash-equilibrium of the proposed game is analyzed. In order to find the optimal price value for efficient transmit power allocation, an iterative search algorithm is also proposed. Simulation results show that the average spectral efficiency of the proposed scheme is better than that of both the equal transmit power allocation and waterfilling-based power allocation.
- KSP Keywords
- Access point, Nash equilibrium(NE), Power control(PC), Search Algorithm(GSA), Spectral efficiency(SE), Sum rate, Transmit power control, average spectral efficiency, cell-free, iterative search, massive mimo