实时多用户多载波通信

IF 8.9 1区 计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Changkun Li;Junyi Jiang;Wei Chen;Khaled B. Letaief
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引用次数: 0

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Realtime Multiuser Multicarrier Communications
Multiuser multicarrier communication, e.g. orthogonal frequency division multi-access (OFDMA), has been extensively investigated since the 4G era and applied in several mainstream mobile networking standards, because it holds the potential of high-throughput provision, low complexity, and flexible bandwidth allocation. In the upcoming 6G era, mobile networks are newly expected to provide deadline or hard-delay assurance for latency-sensitive traffics generated from factory automation, smart grids, telesurgery, and automatic driving, etc. However, whether the emerging hard-delay constraint can be effectively satisfied in multiuser multicarrier systems, where subcarriers are shared by users, remains open. As a result, a unified framework for realtime multiuser multicarrier communications is presented in this paper, based on the bipartite-graph model of OFDMA. In particular, we conceive a $\mathcal {H}$ -matching empowered joint subcarrier allocation and power adaptation strategy, which is shown to meet the deadline requirements deterministically over frequency-selective channels with finite average transmission power. Furthermore, we leverage the theory of random bipartite graph matching to analyze the delay-constrained capacity as a function of the average transmission power, based on the approximate outage probability of the embedded matching diversity. To gain more insights, asymptotic analysis is adopted to obtain the deadline-constrained throughput when the number of independent subcarriers is huge.
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来源期刊
CiteScore
18.60
自引率
10.60%
发文量
708
审稿时长
5.6 months
期刊介绍: The IEEE Transactions on Wireless Communications is a prestigious publication that showcases cutting-edge advancements in wireless communications. It welcomes both theoretical and practical contributions in various areas. The scope of the Transactions encompasses a wide range of topics, including modulation and coding, detection and estimation, propagation and channel characterization, and diversity techniques. The journal also emphasizes the physical and link layer communication aspects of network architectures and protocols. The journal is open to papers on specific topics or non-traditional topics related to specific application areas. This includes simulation tools and methodologies, orthogonal frequency division multiplexing, MIMO systems, and wireless over optical technologies. Overall, the IEEE Transactions on Wireless Communications serves as a platform for high-quality manuscripts that push the boundaries of wireless communications and contribute to advancements in the field.
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