Scaling law of feedback bits for distributed antenna systems with limited feedback

Eunsung Park; Sang Rim Lee; Hoon Lee; Inkyu Lee

doi:10.1109/VTCFall.2014.6966168

Scaling law of feedback bits for distributed antenna systems with limited feedback

Eunsung Park, Sang Rim Lee, Hoon Lee, Inkyu Lee

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this paper, we study a feedback bit allocation algorithm with signal-to-leakage plus noise ratio maximizing beamforming (FA-SMB) for distributed antenna systems (DAS) presented in work [1]. We first investigate a scaling law of feedback bits for both the FA-SMB scheme and equal bit allocation. Through this analysis, we confirm that the required number of feedback bits to satisfy the maximum allowable rate gap between DAS with perfect channel state information (CSI) and limited feedback linearly increases with signal-to-noise ratio. Also, it is verified that the FA-SMB scheme saves the feedback bits by up to 30% over the equal bit allocation with the same rate gap at SNR = 40 dB for three-user DAS. Moreover, we show that the FA-SMB scheme substantially reduces the computational complexity compared to exhaustive search. Finally, we provide simulation results to demonstrate the efficacy of the FA-SMB scheme.

Original language	English
Title of host publication	2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479944491, 9781479944491
DOIs	https://doi.org/10.1109/VTCFall.2014.6966168
Publication status	Published - 2014 Nov 24
Externally published	Yes
Event	80th IEEE Vehicular Technology Conference, VTC 2014-Fall - Vancouver, Canada Duration: 2014 Sept 14 → 2014 Sept 17

Publication series

Name	IEEE Vehicular Technology Conference
ISSN (Print)	1550-2252

Conference

Conference	80th IEEE Vehicular Technology Conference, VTC 2014-Fall
Country/Territory	Canada
City	Vancouver
Period	14/9/14 → 14/9/17

Bibliographical note

Publisher Copyright:
© 2014 IEEE.

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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10.1109/VTCFall.2014.6966168

Cite this

Scaling law of feedback bits for distributed antenna systems with limited feedback. / Park, Eunsung; Lee, Sang Rim; Lee, Hoon et al.
2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2014. 6966168 (IEEE Vehicular Technology Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Park, E, Lee, SR, Lee, H & Lee, I 2014, Scaling law of feedback bits for distributed antenna systems with limited feedback. in 2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings., 6966168, IEEE Vehicular Technology Conference, Institute of Electrical and Electronics Engineers Inc., 80th IEEE Vehicular Technology Conference, VTC 2014-Fall, Vancouver, Canada, 14/9/14. https://doi.org/10.1109/VTCFall.2014.6966168

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Scaling law of feedback bits for distributed antenna systems with limited feedback

Abstract

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