Non-orthogonal multi-access user pairing based on neighborhood search with threshold in heterogeneous networks

Tong Zhu; Guifen Chen; Guowei Wu

doi:10.1117/12.2685507

28 July 2023 Non-orthogonal multi-access user pairing based on neighborhood search with threshold in heterogeneous networks

Tong Zhu, Guifen Chen, Guowei Wu

Author Affiliations +

Proceedings Volume 12716, Third International Conference on Digital Signal and Computer Communications (DSCC 2023); 127161U (2023) https://doi.org/10.1117/12.2685507
Event: Third International Conference on Digital Signal and Computer Communications (DSCC 2023), 2023, Xi'an, China

Abstract

In our work, we came up with an algorithm for user pairing in a non-perfect SIC (successive interference cancellation) downlink NOMA (Non-orthogonal multiple access) system under a heterogeneous network model. The minimum threshold condition for user pairing is first derived demonstrating the effect of non-perfect SIC on NOMA user's rate. Then, the user scheduling under the heterogeneous network model is completed by using the neighborhood search for optimization, and the system is achieved, and the rate is maximized. Finally, it is verified through simulation experiments that the method can obtain the global optimal solution and has a smaller complexity, which is more suitable for the case of large-scale users. While the transmission rate requirements are met effectively for weak users and yielding a superior performance compared to the previous user pairing strategy.

Citation Download Citation

Tong Zhu, Guifen Chen, and Guowei Wu "Non-orthogonal multi-access user pairing based on neighborhood search with threshold in heterogeneous networks", Proc. SPIE 12716, Third International Conference on Digital Signal and Computer Communications (DSCC 2023), 127161U (28 July 2023); https://doi.org/10.1117/12.2685507

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