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Activity Detection ...
Activity Detection in Distributed MIMO: Distributed AMP via Likelihood Ratio Fusion
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- Bai, Jianan (author)
- Linköpings universitet,Kommunikationssystem,Tekniska fakulteten
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- Larsson, Erik G (author)
- Linköpings universitet,Kommunikationssystem,Tekniska fakulteten
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(creator_code:org_t)
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2022
- 2022
- English.
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In: IEEE Wireless Communications Letters. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 2162-2337 .- 2162-2345. ; 11:10, s. 2200-2204
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Abstract
Subject headings
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- We develop a new algorithm for activity detection for grant-free multiple access in distributed multiple-input multiple-output (MIMO). The algorithm is a distributed version of the approximate message passing (AMP) based on a soft combination of likelihood ratios computed independently at multiple access points. The underpinning theoretical basis of our algorithm is a new observation that we made about the state evolution in the AMP. Specifically, with a minimum mean-square error denoiser, the state maintains a block-diagonal structure whenever the covariance matrices of the signals have such a structure. We show by numerical examples that the algorithm outperforms competing schemes from the literature.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Keyword
- MIMO communication; Approximation algorithms; Channel estimation; Sparse matrices; Resource management; Receiving antennas; Message passing; Distributed AMP; activity detection; distributed MIMO
Publication and Content Type
- ref (subject category)
- art (subject category)
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