Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/172073
Title: Joint power allocation and rate control for rate splitting multiple access networks with covert communications
Authors: Hieu, Nguyen Quang
Hoang, Dinh Thai
Niyato, Dusit
Nguyen, Diep N.
Kim, Dong In
Jamalipour, Abbas
Keywords: Engineering::Computer science and engineering
Issue Date: 2023
Source: Hieu, N. Q., Hoang, D. T., Niyato, D., Nguyen, D. N., Kim, D. I. & Jamalipour, A. (2023). Joint power allocation and rate control for rate splitting multiple access networks with covert communications. IEEE Transactions On Communications, 71(4), 2274-2287. https://dx.doi.org/10.1109/TCOMM.2023.3242670
Project: AISG2-RP-2020-019 
Journal: IEEE Transactions on Communications
Abstract: Rate Splitting Multiple Access (RSMA) has recently emerged as a promising technique to enhance the transmission rate for multiple access networks. Unlike conventional multiple access schemes, RSMA requires splitting and transmitting messages at different rates. The joint optimization of the power allocation and rate control at the transmitter is challenging given the uncertainty and dynamics of the environment. Furthermore, securing transmissions in RSMA networks is a crucial problem because the messages transmitted can be easily exposed to adversaries. This work first proposes a stochastic optimization framework that allows the transmitter to adaptively adjust its power and transmission rates allocated to users, and thereby maximizing the sum-rate and fairness of the system under the presence of an adversary. We then develop a highly effective learning algorithm that can help the transmitter to find the optimal policy without requiring complete information about the environment in advance. Extensive simulations show that our proposed scheme can achieve non-saturated transmission rates at high SNR values with infinite blocklength. More significantly, our proposed scheme can achieve positive covert transmission rates in the finite blocklength regime, compared with zero-valued covert rates of a conventional multiple access scheme.
URI: https://hdl.handle.net/10356/172073
ISSN: 0090-6778
DOI: 10.1109/TCOMM.2023.3242670
Schools: School of Computer Science and Engineering 
Rights: © 2023 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCSE Journal Articles

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