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Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
| Content Provider | MDPI |
|---|---|
| Author | Li, Suoping Liang, Wenwu Pla, Vicent Yang, Nana Yang, Sa |
| Copyright Year | 2021 |
| Description | In this paper, we consider a novel cooperative underlay cognitive radio network based on non-orthogonal multiple access (CR-NOMA) with adaptive relay selection and power allocation. In secondary networks, dedicated relay assistance and user assistance are used to achieve communication between the base station and the far (and near) user. Here, a two-stage adaptive relay selection and power allocation strategy is proposed to maximize the achievable data rate of the far user while ensuring the service quality of near user. Furthermore, the closed-form expressions of outage probability of two secondary users are derived, respectively, under interference power constraints, revealing the impact of transmit power, number of relays, interference threshold and target data rate on system outage probability. Numerical results and simulations validate the advantages of the established cooperation and show that the proposed adaptive relay selection and power allocation strategy has better outage performance. |
| Starting Page | 10433 |
| e-ISSN | 20763417 |
| DOI | 10.3390/app112110433 |
| Journal | Applied Sciences |
| Issue Number | 21 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-06 |
| Access Restriction | Open |
| Subject Keyword | Applied Sciences Industrial Engineering Telecommunications Cognitive Radio Networks Non-orthogonal Multiple Access Underlay Spectrum Sharing Relay Selection Power Allocation |
| Content Type | Text |
| Resource Type | Article |
