Power Allocation Algorithms for Stable Successive Interference Cancellation in Millimeter Wave NOMA Systems

In this paper, we investigate power allocation algorithms in a downlink millimeter wave non-orthogonal multiple access (mmWave-NOMA) system, which consists of one base station (BS) and a group of two-user clusters. Specifically, two optimization problems are formulated to maximize the achievable sum...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2021-06, Vol.70 (6), p.5833-5847
Main Authors: Zhang, Yu, Zhao, Xiongwen, Geng, Suiyan, Zhou, Zhenyu, Qin, Peng, Zhang, Lei, Yang, Liuqing
Format: Article
Language:English
Subjects:
achievable sum rate
Algorithms
Array signal processing
Clusters
Decoding
Downlink
energy efficiency
Interference
Maximization
Millimeter wave NOMA
Millimeter waves
NOMA
Nonorthogonal multiple access
Optimization
power allocation
Radio frequency
Resource management
SIC-stability
Silicon carbide
Stability
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Summary:In this paper, we investigate power allocation algorithms in a downlink millimeter wave non-orthogonal multiple access (mmWave-NOMA) system, which consists of one base station (BS) and a group of two-user clusters. Specifically, two optimization problems are formulated to maximize the achievable sum rate (ASR) and energy efficiency (EE), respectively, while satisfying the individual quality of service (QoS) constraints. To ensure the stability of successive interference cancellation (SIC-stability), we specially add the power order constraints, which are often neglected in existing works. By dividing each formulated problem into more tractable inter-cluster and intra-cluster sub-problems, and deriving the corresponding solutions, we propose the ASR maximization based power allocation (ASRMax-PA) and EE maximization based power allocation (EEMax-PA) algorithms. Numerical results show that the proposed ASRMax-PA (EEMax-PA) algorithm is much better than the state-of-the-art schemes in term of ASR (EE), while yields quite good EE (ASR) performance simultaneously. Moreover, both the two proposed algorithms can ensure SIC-stability, which is shown to have a significant impact on the NOMA system performance.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2021.3077270