Abstract
We study an X-type non-orthogonal multiple access (NOMA) wireless relay network that consists of an uplink multiple access channel and a downlink broadcast channel. We formulate a non-convex optimization problem to obtain an optimal power allocation factor and an optimal rate vector that maximize the end-to-end sum rate. To solve the optimization problem, we prove four theorems that contain closed-form expressions for the optimal solutions. We also use computer simulation to obtain some numerical results.
| Original language | English |
|---|---|
| Pages (from-to) | 1966-1970 |
| Number of pages | 5 |
| Journal | IEEE Wireless Communications Letters |
| Volume | 12 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1 Nov 2023 |
Keywords
- Wireless relay networks
- broadcast channel
- multiple access channel
- non-convex optimization
- non-orthogonal multiple access
- power allocation
- rate combination