Cooperative Transmission Strategy over Users' Mobility for Downlink Distributed Antenna Systems

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Cooperative Transmission Strategy over Users' Mobility for Downlink Distributed Antenna Systems
Title:
Cooperative Transmission Strategy over Users' Mobility for Downlink Distributed Antenna Systems
Journal Title:
GLOBECOM 2017 - 2017 IEEE Global Communications Conference
Keywords:
Publication Date:
04 December 2017
Citation:
A. Khadka, K. Adachi, S. Sun, J. Wang, H. Zhu and J. Wang, "Cooperative Transmission Strategy over Users' Mobility for Downlink Distributed Antenna Systems," GLOBECOM 2017 - 2017 IEEE Global Communications Conference, Singapore, 2017, pp. 1-6. doi: 10.1109/GLOCOM.2017.8254565
Abstract:
Previously, a scheme in [1] was proposed for the outdated channel state information (CSI) problem, for data transmission in time division duplex (TDD) systems. In user movement environment, the actual channel of data transmission at downlink time slot is different from the estimated channel due to channel variation. In this paper, the effect of different user mobility on TDD downlink multiuser distributed antenna system is investigated. An efficient autocorrelation based feedback interval technique is proposed and updates CSI at less the cost of the downlink time slots. In the proposed technique, the frequency of CSI feedback for different users is proportional to their speed. Cooperative clusters are formed to maximize sum rate where channel gain based antenna selection and user clustering based on signal-to- interference plus noise ratio (SINR) threshold is applied to reduce computational complexity. Numerical results show that sum rate superiority of the proposed scheme over the user mobility.
License type:
PublisherCopyrights
Funding Info:
Description:
© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
ISBN:
978-1-5090-5019-2
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