Experimental investigation of antenna selection and transmit beamforming for capacity enhancement in 3×3 MIMO-enabled radio-over-fiber DAS

George S D Gordon, Michael J. Crisp, Richard V. Penty, Ian H. White

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper examines the impact of two simple precoding schemes on the capacity of 3 × 3 MIMO-enabled radio-over-fiber (RoF) distributed antenna systems (DAS) with excess transmit antennas. Specifically, phase-shift-only transmit beamforming and antenna selection are compared. It is found that for two typical indoor propagation scenarios, both strategies offer double the capacity gain that non-precoding MIMO DAS offers over traditional MIMO collocated antenna systems (CAS), with capacity improvements of 3.2-4.2 bit/s/Hz. Further, antenna selection shows similar performance to phase-only beamforming, differing by <0.5% and offering median capacities of 94 bit/s/Hz and 82 bit/s/Hz in the two propagation scenarios respectively. Because optical DASs enable precise, centralized control of remote antennas, they are well suited for implementing these beamforming schemes. Antenna selection, in particular, is a simple and effective means of increasing MIMO DAS capacity.

Original languageEnglish
Title of host publication2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013
PublisherIEEE
Pages313-316
Number of pages4
ISBN (Print)9781467360715
DOIs
Publication statusPublished - 27 Jan 2014
Event2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013 - Alexandria, VA, USA United States
Duration: 28 Oct 201331 Oct 2013

Conference

Conference2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013
CountryUSA United States
CityAlexandria, VA
Period28/10/1331/10/13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Gordon, G. S. D., Crisp, M. J., Penty, R. V., & White, I. H. (2014). Experimental investigation of antenna selection and transmit beamforming for capacity enhancement in 3×3 MIMO-enabled radio-over-fiber DAS. In 2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013 (pp. 313-316). [6724084] IEEE. https://doi.org/10.1109/MWP.2013.6724084