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Activity Detection for Massive Random Access Using Covariance-Based Matching Pursuit
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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12
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IEEE Transactions on Vehicular Technology, Volume 74, issue 11, pp. 17292-17303
Abstract
The Internet of Things paradigm heavily relies on a network of a massive number of machine -type devices (MTDs) that monitor various phenomena. Consequently, MTDs are randomly activated at different times whenever a change occurs. In general, fewer MTDs are simultaneously activated across the network, resembling targeted sampling in compressed sensing. Therefore, signal recovery in machine -type communications is addressed through joint user activity detection and channel estimation algorithms built using compressed sensing theory. However, most of these algorithms follow a two-stage procedure in which a channel is first estimated and later mapped to find active users. This approach is inefficient because the estimated channel information is subsequently discarded. To overcome this limitation, we introduce a novel covariance-learning matching pursuit (CL-MP) algorithm that bypasses explicit channel estimation. Instead, it focuses on estimating the indices of the active users greedily. Simulation results presented in terms of probability of misdetection, exact recovery rate, computational complexity and runtimes validate the proposed technique's superior performance and efficiency.
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Publisher Copyright: © 1967-2012 IEEE.
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Marata, L, Ollila, E & Alves, H 2025, 'Activity Detection for Massive Random Access Using Covariance-Based Matching Pursuit', IEEE Transactions on Vehicular Technology, vol. 74, no. 11, pp. 17292-17303. https://doi.org/10.1109/TVT.2025.3574551