Abstract
This letter proposes an orthogonal time frequency space (OTFS) modulation based non-orthogonal multiple access (NOMA) scheme for the coordinated direct and relay transmission system, where a source communicates directly with a nearby mobile user, and serves a distant user with high-mobility relying on the relaying assistance. However, the coexistence of signal superposition coding and multi-domain transformation presents a challenge in measuring the performance of OTFS-based NOMA from a theoretical perspective. To accurately evaluate the system performance of the proposed scheme, we derive the closed-form expressions for the outage probability and outage sum rate using the inversion formula and characteristic function under both perfect SIC and imperfect SIC. Numerical results verify the performance superiority and the effectiveness of the proposed scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 2268-2272 |
| Number of pages | 5 |
| Journal | IEEE Wireless Communications Letters |
| Volume | 12 |
| Issue number | 12 |
| Early online date | 22 Sept 2023 |
| DOIs | |
| Publication status | Published - Dec 2023 |
| Externally published | Yes |
Bibliographical note
This work was supported in part by the Natural Science Foundation of Jiangsu Province under Grant BK20220438; in part by the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province under Grant 22KJB510033; in part by the Startup Foundation for Introducing Talent of NUIST under Grant 2023r015; and in part by the National Natural Science Foundation of China under Grant 62301268, Grant 62101232, Grant 62301502, and Grant 62301264.Keywords
- Coordinated direct and relay transmission
- non-orthogonal multiple access
- orthogonal time frequency space modulation
- outage performance