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Relay-enabled backscatter communications : linear mapping and resource allocation
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Xu, Rui, Shi, Liqin, Ye, Yinghui, Sun, Haijian and Zheng, Gan (2023) Relay-enabled backscatter communications : linear mapping and resource allocation. IEEE Transactions on Vehicular Technology, 72 (12). pp. 16323-16337. doi:10.1109/tvt.2023.3299621 ISSN 1939-9359.
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WRAP-Relay-enabled-backscatter-communications-linear-mapping-allocation-23.pdf - Accepted Version - Requires a PDF viewer. Download (989Kb) | Preview |
Official URL: https://doi.org/10.1109/TVT.2023.3299621
Abstract
Relay-enabled backscatter communication (BC) is an intriguing paradigm to alleviate energy shortage and improve throughput of Internet-of-Things (IoT) devices. Most of the existing works focus on the resource allocation that considered the unequal and continuous time allocation for both source-relay and relay-destination links. However, the continuous time allocation may be infeasible since in practice, the time allocation shall be carried out in integral multiple of the subframe duration unit. In this article, we study a discrete time scheme from the perspective of frame structure, where one transmission block is divided into two phases and the linear mapping is employed as a re-encoding method to determine the number of subframes for both phases and the power allocation for each subframe in a relay-enabled BC system. Based on this, we derive an accurate system-throughput expression and formulate a mixed-integral non-convex optimization problem to maximize the system throughput by jointly optimizing the power reflection coefficient (PRC) of the IoT node, the power allocation of the hybrid access point (HAP) and the linear mapping matrix, and solve it via a three-step approach. First, we derive the optimal eigenvalues of the linear mapping matrix via introducing auxiliary variables and exploiting Karush-Kuhn-Tucker (KKT) conditions. Second, we employ the time-sharing technology to convert the discrete optimization problem to a continuous non-convex problem and solve it by leveraging successive convex approximation (SCA) and monotonicity or bisection method. Finally, an integer conversion strategy is designed to find a suboptimal number of subframes for both phases, based on which the continuous variables are further optimized. According to the above approaches, we propose a low complexity iterative algorithm to obtain the throughput maximization-based resource allocation solution. Numerical results analyze the performance of our proposed algorithm, verify the superi...
Item Type: | Journal Article | |||||||||||||||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | |||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||||||||||||||
SWORD Depositor: | Library Publications Router | |||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Backscatter communication, Internet of things, Resource allocation, Wireless communication systems, Radio relay systems | |||||||||||||||||||||
Journal or Publication Title: | IEEE Transactions on Vehicular Technology | |||||||||||||||||||||
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) | |||||||||||||||||||||
ISSN: | 1939-9359 | |||||||||||||||||||||
Official Date: | December 2023 | |||||||||||||||||||||
Dates: |
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Volume: | 72 | |||||||||||||||||||||
Number: | 12 | |||||||||||||||||||||
Page Range: | pp. 16323-16337 | |||||||||||||||||||||
DOI: | 10.1109/tvt.2023.3299621 | |||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Re-use Statement: | © 2023 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. | |||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||
Date of first compliant deposit: | 5 October 2023 | |||||||||||||||||||||
Date of first compliant Open Access: | 5 October 2023 | |||||||||||||||||||||
RIOXX Funder/Project Grant: |
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