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 proceedingConference 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 languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479944491, 9781479944491
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes
Event80th IEEE Vehicular Technology Conference, VTC 2014 - Vancouver, Canada
Duration: 2014 Sep 142014 Sep 17

Other

Other80th IEEE Vehicular Technology Conference, VTC 2014
CountryCanada
CityVancouver
Period14/9/1414/9/17

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Park, E., Lee, S. R., Lee, H., & Lee, I. (2014). Scaling law of feedback bits for distributed antenna systems with limited feedback. In IEEE Vehicular Technology Conference [6966168] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/VTCFall.2014.6966168