Reduced space channel feedback for FD-MIMO

To support downlink full-dimension (FD-MIMO) in FDD scenarios, an accurate yet reasonably efficient channel-state-information (CSI) feedback scheme is required to harness the potential beamforming gain offered by the use of a large number of antenna elements in a 2D active antenna array. In this pap...

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Bibliographic Details
Published in2015 IEEE International Conference on Communications (ICC) pp. 3873 - 3878
Main Authors Onggosanusi, Eko, Yang Li, Rahman, Md Saifur, Young-Han Nam, Jianzhong Zhang, Ji-Yun Seol, Taeyoung Kim
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2015
Subjects
Antenna measurements
Array signal processing
Arrays
beamforming
channel quantization
CSI
FD-MIMO
FDD
feedback
LTE
massive MIMO
Mobile communication
Mobile computing
MU-MIMO
precoding
Quantization (signal)
Wireless communication
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Summary:To support downlink full-dimension (FD-MIMO) in FDD scenarios, an accurate yet reasonably efficient channel-state-information (CSI) feedback scheme is required to harness the potential beamforming gain offered by the use of a large number of antenna elements in a 2D active antenna array. In this paper, a reduced-spaced channel quantization and feedback scheme which exploits slow variation of the angle-of-departure (AoD) distribution is proposed. By perceiving the instantaneous spatial channel to be a linear combination of slowly varying subset of matrices, it is demonstrated that the proposed scheme offers up to 62.5% dimensionality reduction with negligible throughput loss in 16-antenna FD-MIMO system. When used together with vector quantization, the proposed scheme offers substantial gain over that supported by 3GPP LTE.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2015.7248928