User Pairing for Downlink Non-Orthogonal Multiple Access Networks Using Matching Algorithm

In this paper, we study the user pairing in a downlink non-orthogonal multiple access (NOMA) network, where the base station allocates the power to the pairwise users within the cluster. In the considered NOMA network, a user with poor channel condition is paired with a user with good channel condit...

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Veröffentlicht in:IEEE transactions on communications Jg. 65; H. 12; S. 5319 - 5332
Hauptverfasser: Liang, Wei, Ding, Zhiguo, Li, Yonghui, Song, Lingyang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.12.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Adaptive systems
adaptive trellis turbo coded modulation
Algorithm design and analysis
Algorithms
Codes
Cognitive radio
Downlink
Matching
matching theory
Modulation
NOMA
Non-orthogonal multiple access scheme
Nonorthogonal multiple access
Power management
Radio equipment
Resource management
Throughput
User requirements
User satisfaction
ISSN:0090-6778, 1558-0857
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Zusammenfassung:In this paper, we study the user pairing in a downlink non-orthogonal multiple access (NOMA) network, where the base station allocates the power to the pairwise users within the cluster. In the considered NOMA network, a user with poor channel condition is paired with a user with good channel condition, when both their rate requirements are satisfied. Specifically, the quality of service for weak users can be guaranteed, since the transmit power allocated to strong users is constrained following the concept of cognitive radio. A distributed matching algorithm is proposed in the downlink NOMA network, aiming to optimize the user pairing and power allocation between weak users and strong users, subject to the users' targeted rate requirements. Our results show that the proposed algorithm outperforms the conventional orthogonal multiple access scheme and approaches the performance of the centralized algorithm, despite its low complexity. In order to improve the system's throughput, we design a practical adaptive turbo trellis coded modulation scheme for the considered network, which adaptively adjusts the code rate and the modulation mode based on the instantaneous channel conditions. The joint design work leads to significant mutual benefits for all the users as well as the improved system throughput.
Bibliographie:ObjectType-Article-1
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content type line 14
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2017.2744640