Non-cooperative feedback control game under a sum feedback-rate constraint in MIMO broadcast channels

Channel state information (CSI) is known to play crucial role in multiple-input multiple-output (MIMO) broadcast channels. To acquire CSI at the base station, feedback from users is necessary. Since the optimal feedback-rate to maximize the total system throughput is possibly changed by the channel...

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Bibliographic Details
Main Authors: Seonghun Yun, Jungho Myung, Wonju Lee, Joonhyuk Kang
Format: Conference Proceeding
Language:English
Subjects:
channel state information
Frequency control
Games
Interference
Limited feedback
MIMO
multi-user MIMO
non-cooperative game
Resource management
Signal processing algorithms
Throughput
Online Access:Request full text
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Description
Summary:Channel state information (CSI) is known to play crucial role in multiple-input multiple-output (MIMO) broadcast channels. To acquire CSI at the base station, feedback from users is necessary. Since the optimal feedback-rate to maximize the total system throughput is possibly changed by the channel condition, the conventional equal-sized feedback can be inefficient in multi-user MIMO system. Therefore, in this paper, we investigate the effect of different-sized feedback-rate and propose the non-cooperative feedback-rate control game in multi-user MIMO system with multiple frequency bands. Based on the game theory, the utility function of each user is defined as the downlink throughput minus a linear price function of the CSI feedback-rate. Moreover, we suggest a simple algorithm to find the proper pricing factors for the proposed game considering multiple users and multiple frequency bands. Simulation results show that the sum-rate of the proposed game yields better performance than that of the conventional equal-sized feedback-rate scheme.
ISSN:2373-0803
2693-3551
DOI:10.1109/SSP.2014.6884685