A POWER EFFICIENT PILOT DESIGN FOR MULTI-CELL MASSIVE MIMO SYSTEMS
| Main Author: | Trinh Van Chien |
|---|---|
| Format: | Proceeding eJournal |
| Terbitan: |
, 2019
|
| Online Access: |
https://zenodo.org/record/2612904 |
Daftar Isi:
- In this paper, we address the pilot contamination problem in multi-cell Massive MIMO systems. Particularly, we pro- pose a pilot design scheme that simultaneously minimizes the channel estimation errors of all base stations (BSs) and the total pilot power consumption of all users subject to the trans- mit power constraint for every user in the network. We de- compose the proposed non-convex problem into distributed optimization problems to be solved at each BS, assuming the knowledge of pilot signals of the other BSs. Then, we in- troduce a successive optimization approach to cast each dis- tributed optimization problem into a convex linear matrix in- equality form. Simulation results confirm that the proposed approach significantly reduces pilot power while maintaining the same level of channel estimation error as a recent work in [1].