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FlexCore: Massively Parallel and Flexible Processing for Large MIMO Access Points

Husmann, Christopher Camilo Mischa, Georgis, Georgios, Nikitopoulos, Konstantinos and Jamieson, Kyle (2017) FlexCore: Massively Parallel and Flexible Processing for Large MIMO Access Points In: 14th USENIX Symposium on Networked Systems Design and Implementation, 2017-03-27 - 2017-03-29, Boston, MA, USA.

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Abstract

Large MIMO base stations remain among wireless network designers’ best tools for increasing wireless throughput while serving many clients, but current system designs, sacrifice throughput with simple linear MIMO detection algorithms. Higher-performance detection techniques are known, but remain off the table because these systems parallelize their computation at the level of a whole OFDM subcarrier, sufficing only for the lessdemanding linear detection approaches they opt for. This paper presents FlexCore, the first computational architecture capable of parallelizing the detection of large numbers of mutually-interfering information streams at a granularity below individual OFDM subcarriers, in a nearly-embarrassingly parallel manner while utilizing any number of available processing elements. For 12 clients sending 64-QAM symbols to a 12-antenna base station, our WARP testbed evaluation shows similar network throughput to the state-of-the-art while using an order of magnitude fewer processing elements. For the same scenario, our combined WARP-GPU testbed evaluation demonstrates a 19× computational speedup, with 97% increased energy efficiency when compared with the state of the art. Finally, for the same scenario, an FPGAbased comparison between FlexCore and the state of the art shows that FlexCore can achieve up to 96% better energy efficiency, and can offer up to 32× the processing throughput.

Item Type: Conference or Workshop Item (Conference Paper)
Subjects : Electronic Engineering
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Authors :
NameEmailORCID
Husmann, Christopher Camilo Mischac.husmann@surrey.ac.ukUNSPECIFIED
Georgis, Georgiosg.georgis@surrey.ac.ukUNSPECIFIED
Nikitopoulos, Konstantinosk.nikitopoulos@surrey.ac.ukUNSPECIFIED
Jamieson, KyleUNSPECIFIEDUNSPECIFIED
Date : 2017
Copyright Disclaimer : Open access to the Proceedings of the 14th USENIX Symposium on Networked Systems Design and Implementation is sponsored by USENIX
Contributors :
ContributionNameEmailORCID
UNSPECIFIEDUsenix, UNSPECIFIEDUNSPECIFIED
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 31 Mar 2017 15:27
Last Modified : 04 Jul 2017 16:36
URI: http://epubs.surrey.ac.uk/id/eprint/813908

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