Exploration of user separation capabilities by distributed large antenna arrays

Cheng-Ming Chen, Vladimir Volskiy, Alessandro Chiumento, Liesbet Van der Perre, Guy AE Vandenbosch, Sofie Pollin

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

15 Citations (Scopus)
2 Downloads (Pure)

Abstract

In this paper, we present a novel exploration of spatial separation of closely-located users by a massive MIMO system in line-of-sight (LoS) for both an anechoic chamber and an indoor corridor propagation environments. A distributed massive multiple-input multiple-output (DM-MIMO) system powered by software defined radios (SDRs) has been used for the measurement campaign. For the user separation study, we first conduct an analysis with a spherical wave channel model for physically-large rectangular arrays. Preliminary simulation results show that a single antenna array achieves better user separation for users distributed on a line parallel to the array plane rather than when users are distributed on a line normal to the array. An intuitive idea is that, by splitting a collocated antenna array into two subarrays, additional diversity is created if the second sub-array is on a plane orthogonal to the first sub-array. Figures of merit such as the correlation coefficients, condition numbers and sum-rates of both centralized and distributed antenna arrays have been chosen to determine the impact of array split and positioning on user separation. Extensive measurements, performed on two 32-element antenna arrays of a massive MIMO testbed at 2.6GHz, show that an improvement of around 140% can be achieved in a poor scattered environment if distributed arrays are used instead of centralized ones.
Original languageEnglish
Title of host publication2016 IEEE Globecom Workshops (GC Wkshps)
Number of pages6
ISBN (Electronic)978-1-5090-2482-7
DOIs
Publication statusPublished - 2016
Externally publishedYes
Event2016 IEEE Global Communications Conference, GLOBECOM 2016: Freedom through Communications - Washington Hilton Hotel, Washington, United States
Duration: 4 Dec 20168 Dec 2016
http://globecom2016.ieee-globecom.org/

Conference

Conference2016 IEEE Global Communications Conference, GLOBECOM 2016
Abbreviated titleGLOBECOM
CountryUnited States
CityWashington
Period4/12/168/12/16
Other4-8 December 2016
Internet address

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