Abstract
In this paper, we present uplink interference alignment (IA) schemes for two-cell multiple-input-multiple-output (MIMO) channels. Assuming that each cell has K interfering users, we propose an IA scheme for the full interference channel (FIC) and derive the achievable degrees of freedom (DOFs). The proposed scheme is extended to a two-cell Z-interference channel (ZIC), where only one of the two cells is subject to interference. The achievable DOF for the two-cell ZIC channel is also derived, and it is compared with that of the FIC with the IA and that of the conventional orthogonal scheme based on numerical results.
| Original language | English |
|---|---|
| Article number | 6395848 |
| Pages (from-to) | 1861-1865 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 62 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2013 |
Keywords
- Degrees of freedom
- interference alignment
- multiple-input-multiple-output (MIMO)