TITLE:
Research on User Pairing Techniques Based on NOMA in Cognitive Radio Networks
AUTHORS:
Yongming Huang, Xiaoli He, Yuxin Du
KEYWORDS:
Cognitive Radio, Non-Orthogonal Multiple Access, User Grouping, Power Allocation
JOURNAL NAME:
Journal of Computer and Communications,
Vol.11 No.3,
March
31,
2023
ABSTRACT: This paper outlined a Non-Orthogonal Multiple Access (NOMA) grouping transmission scheme for cognitive radio networks. To address the problems of small channel gain difference of the middle part users caused by the traditional far-near pairing algorithm, and the low transmission rate of the traditional Orthogonal Multiple Access (OMA) transmission, a joint pairing algorithm was proposed, which provided multiple pairing schemes according to the actual scene. Firstly, the secondary users were sorted according to their channel gain, and then different secondary user groups were divided, and the far-near pairing combined with (Uniform Channel Gain Difference (UCGD) algorithm was used to group the secondary users. After completing the user pairing, the power allocation problem was solved. Finally, the simulation data results showed that the proposed algorithm can effectively improve the system transmission rate.