Abstract
In this letter, we provide a new framework for semiblind interference alignment (SBIA) in multi-input-single-output broadcast channels (MISO-BC) where the transmitter receives channel feedback from only one receiver (referred to as supernode). The supernode is called so because it has reconfigurable antennas as well as a feedback mechanism to the transmitters. All other receivers neither have reconfigurable antennas nor provide any kind of feedback to the transmitter. We provide a linear precoding scheme using interference alignment (IA) for this new framework for some classes of MISO-BC, and show that the degrees of freedom (DoF) gain is higher than the traditional orthogonal transmission schemes such as time-division-multiple-access (TDMA). Our proposed SBIA can also be applied to the two-user X-channel for which it is DoF-optimal.
| Original language | English |
|---|---|
| Article number | 7429719 |
| Pages (from-to) | 580-584 |
| Number of pages | 5 |
| Journal | IEEE Signal Processing Letters |
| Volume | 23 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 IEEE.
ASJC Scopus Subject Areas
- Signal Processing
- Electrical and Electronic Engineering
- Applied Mathematics
Keywords
- Blind interference alignment (IA)
- broadcast channels
- degrees of freedom (DoF)