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| Content Provider | IET Digital Library |
|---|---|
| Author | Cai, Wenbo Chen, Chen Bai, Lin Jin, Ye Choi, Jinho |
| Abstract | In this study, the authors investigate the resource allocation (RA) problem for the downlink orthogonal frequency division multiplexing based non-orthogonal multiple access (OFDM-NOMA) system. The RA problem is decomposed into two subproblems of subcarrier allocation (SA) and power allocation (PA). For the SA, a user grouping based greedy algorithm is proposed under the assumption that power is uniformly distributed among all the selected users. For the PA, the authors propose the iterative water-filling and specific user rate maximising criterion with minimum rate constraints (iterative WF + SURMC-MRC) scheme to jointly consider the PA problem among the selected users on one subcarrier and the PA problem among subcarriers. The simulation results show that the spectral efficiency performance of the proposed iterative WF + SURMC-MRC scheme outperforms those of the (non-iterative) WF + SURMC-MRC scheme and the uniform distribution (UD) + SURMC-MRC scheme. Moreover, the iterative WF + SURMC-MRC scheme has advantages in resisting against the user overloading compared with the (non-iterative) WF + SURMC-MRC scheme. |
| Starting Page | 51 |
| Ending Page | 58 |
| Page Count | 8 |
| ISSN | 17519675 |
| Volume Number | 11 |
| e-ISSN | 17519683 |
| Issue Number | Issue 1, Feb (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-spr/11/1 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2016.0188 |
| Journal | IET Signal Processing |
| Publisher Date | 2016-08-03 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Downlink OFDM-NOMA System Greedy Algorithm Interpolation And Function Approximation Iterative Method Iterative Water-filling Criterion Iterative WF-SURMC-MRC Scheme Minimum Rate Constraint Modulation And Coding Method Multi-access System Multiple Access Communication Nonorthogonal Multiple Access System Numerical Analysis OFDM Modulation Orthogonal Frequency Division Multiplexing System Power Allocation Scheme RA Problem Resource Allocation Resource Allocation Problem Specific User Rate Maximising Criterion Spectral Efficiency Performance Subcarrier Allocation Scheme Uniform Distribution User Grouping Based Greedy Algorithm |
| Content Type | Text |
| Resource Type | Article |
| Subject | Signal Processing Electrical and Electronic Engineering |
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