Massive unsourced random access based on bilinear generalized vector approximate message passing

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dc.contributor.authorAyachi, Ramzi
dc.contributor.examiningcommitteeHossain, Ekram (Electrical and Computer Engineering)
dc.contributor.examiningcommitteeYahampath, Pradeepa (Electrical and Computer Engineering)
dc.contributor.supervisorBellili, Faouzi
dc.contributor.supervisorMezghani, Amine
dc.date.accessioned2024-03-28T20:23:35Z
dc.date.available2024-03-28T20:23:35Z
dc.date.issued2024-03-28
dc.date.submitted2024-03-28T19:34:05Zen_US
dc.degree.disciplineElectrical and Computer Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)
dc.description.abstractThis thesis introduces a new algorithmic solution to the massive unsourced random access (mURA) problem. The proposed uncoupled compressed sensing (UCS)-based scheme relies on slotted transmissions and takes advantage of the inherent coupling provided by the users’ spatial signatures in the form of channel correlations across slots to completely eliminate the need for concatenated coding. As opposed to all existing methods, the proposed solution combines the steps of activity detection, channel estimation, and data decoding into a unified mURA framework. It capitalizes on the bilinear generalized vector approximate message passing (BiG-VAMP) algorithm, tailored to fit the inherent constraints of mURA. To account for the quantization effects, we incorporate an output denoising module into the algorithm. Furthermore, this work presents a novel approach for handling a coarse quantized massive MIMO system by integrating activity detection, channel estimation, and data decoding within a unified framework. The proposed quantized mURA algorithm is evaluated using low-precision analog-to-digital converters (ADCs). Additionally, a state evolution algorithm is developed to validate the performance of both the proposed unquantized and quantized algorithms, demonstrating their consistency in the asymptotic regime. Furthermore, exhaustive computer simulations reveal that the proposed scheme shows promising results even in challenging scenarios.
dc.description.noteMay 2024
dc.identifier.urihttp://hdl.handle.net/1993/38108
dc.language.isoeng
dc.rightsopen accessen_US
dc.subjectMassive Input Massive Output
dc.subjectFactor Graph
dc.subjectVector Approximate Message Passing
dc.subjectCompressed sensing
dc.subjectApproximate Message Passing
dc.subjectCoupled and uncoupled compressed sensing
dc.subjectBelief Propagation
dc.subjectBilinear Generalized Vector Approximate Message Passing
dc.subjectQuantization
dc.subjectAnalog-to-digital converter
dc.titleMassive unsourced random access based on bilinear generalized vector approximate message passing
dc.typemaster thesisen_US
local.subject.manitobano
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