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- W4313591282 abstract "In machine-type communication (MTC), massive access attempts are generated and the massive MIMO is the key technology to support this demand. To support massive MTC (mMTC), the recent extra-large scale massive multiple-input multiple-output (XL-MIMO) architecture has been seen as a promising technology for providing very high-data rates in high-user density scenarios. Therefore, the large dimension is of the same order as the distances to the user equipment (UE) causing spatial non-stationarities and visibility regions (VRs) to occur across the huge XL array extension. In this work, we investigate the random access (RA) problem in crowded mMTC XL-MIMO scenarios; the proposed grant-based random access (GB-RA) protocol combining the advantage of non-orthogonal multiple access (NOMA) and the strongest user collision resolution in extra-large arrays (SUCRe-XL), namely NOVR-XL scheme can allow access of multiple colliding users in the same XL subarray (SA) selecting the same pilot sequence. The proposed NOVR-XL GB-RA protocol is able to provide a reduction in the number of attempts to access the network, while improving the average sum-rate, as the number of SA increases." @default.
- W4313591282 created "2023-01-06" @default.
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- W4313591282 date "2023-01-01" @default.
- W4313591282 modified "2023-10-14" @default.
- W4313591282 title "NOMA-Based Random Access in mMTC XL-MIMO" @default.
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- W4313591282 doi "https://doi.org/10.1109/access.2022.3233942" @default.
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