A slotted pilot-based unsourced random access scheme with a multiple-antenna receiver
File(s)
Accepted version
Author(s)
Ozates, Mert
Kazemi, Mohammad
Duman, Tolga M
Type
Journal Article
Abstract
We consider unsourced random access over fading channels with a massive number of antennas at the base station, and propose a simple, yet energy-efficient solution by dividing the transmission frame into slots. We utilize non-orthogonal pilot sequences followed by a polar codeword for transmission in each slot. At the receiver side, we first detect the transmitted pilot sequences by employing a generalized orthogonal matching pursuit algorithm and utilize a linear minimum mean square error solution to estimate the channel vectors. We then perform an iterative decoding based on maximal ratio combining, single-user polar decoding, and successive interference cancellation with re-estimation of the channel vectors to recover the data bits. We also analyze the performance of the proposed scheme using normal approximations and provide a detailed complexity analysis. Numerical examples demonstrate that the proposed scheme either outperforms the existing schemes in the literature or has a competitive performance with a lower complexity. Furthermore, it is suitable for fast-fading scenarios due to its excellent performance in the short blocklength regime.
Date Issued
2024-04
Date Acceptance
2023-08-15
Citation
IEEE Transactions on Wireless Communications, 2024, 23 (4), pp.3437-3449
ISSN
1536-1276
Publisher
Institute of Electrical and Electronics Engineers
Start Page
3437
End Page
3449
Journal / Book Title
IEEE Transactions on Wireless Communications
Volume
23
Issue
4
Copyright Statement
Copyright © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Identifier
https://ieeexplore.ieee.org/document/10235892
Subjects
Channel estimation
CODING SCHEME
Complexity theory
Decoding
Engineering
Engineering, Electrical & Electronic
generalized orthogonal matching pursuit
Interference cancellation
Iterative decoding
massive MIMO
polar codes
Receivers
Science & Technology
Technology
Telecommunications
Unsourced random access
Wireless communication
Publication Status
Published
Date Publish Online
2023-08-30