Decentralized Baseband Processing for Massive MU-MIMO Systems

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dc.citation.firstpage491
dc.citation.issueNumber4
dc.citation.journalTitleIEEE Journal on Emerging and Selected Topics in Circuits and Systems
dc.citation.lastpage507
dc.citation.volumeNumber7
dc.contributor.authorLi, Kaipeng
dc.contributor.authorSharan, Rishi
dc.contributor.authorChen, Yujun
dc.contributor.authorGoldstein, Tom
dc.contributor.authorCavallaro, Joseph R.
dc.contributor.authorStuder, Christoph
dc.date.accessioned2017-11-29T16:35:27Z
dc.date.available2017-11-29T16:35:27Z
dc.date.issued2017
dc.description.abstractAchieving high spectral efficiency in realistic massive multi-user (MU) multiple-input multiple-output (MIMO) wireless systems requires computationally-complex algorithms for data detection in the uplink (users transmit to base-station) and beamforming in the downlink (base-station transmits to users). Most existing algorithms are designed to be executed on centralized computing hardware at the base-station (BS), which results in prohibitive complexity for systems with hundreds or thousands of antennas and generates raw baseband data rates that exceed the limits of current interconnect technology and chip I/O interfaces. This paper proposes a novel decentralized baseband processing architecture that alleviates these bottlenecks by partitioning the BS antenna array into clusters, each associated with independent radio-frequency chains, analog and digital modulation circuitry, and computing hardware. For this architecture, we develop novel decentralized data detection and beamforming algorithms that only access local channel-state information and require low communication bandwidth among the clusters. We study the associated trade-offs between error-rate performance, computational complexity, and interconnect bandwidth, and we demonstrate the scalability of our solutions for massive MU-MIMO systems with thousands of BS antennas using reference implementations on a graphic processing unit (GPU) cluster.
dc.identifier.citationLi, Kaipeng, Sharan, Rishi, Chen, Yujun, et al.. "Decentralized Baseband Processing for Massive MU-MIMO Systems." <i>IEEE Journal on Emerging and Selected Topics in Circuits and Systems,</i> 7, no. 4 (2017) IEEE: 491-507. https://doi.org/10.1109/JETCAS.2017.2775151.
dc.identifier.digital17JETCAS_DBP_final
dc.identifier.doihttps://doi.org/10.1109/JETCAS.2017.2775151
dc.identifier.urihttps://hdl.handle.net/1911/98867
dc.language.isoeng
dc.publisherIEEE
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IEEE.
dc.titleDecentralized Baseband Processing for Massive MU-MIMO Systems
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpost-print
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