Abstract
Hybrid beamforming with phase shifters and switches has been identified as a low-cost and energy-efficient approach to harness the benefits of massive multiple-input multiple-output (MIMO) systems. In this paper, three subconnected hybrid beamforming structures with different combinations of phase shifters and switches will be considered. Firstly we assume that perfect channel state information (CSI) is available and the wireless channel follows uncorrelated Rayleigh fading model. Then, we derive the closed-form expressions of the low-complexity beamformers and their asymptotic achievable sum-rates. Based on the proposed beamformers, we develop quantized hybrid beamforming and channel estimation techniques for correlated Rayleigh fading channels. These methods rely on designing novel RF codebooks and they can be used in both CSI acquisition and data transmission phases. The proposed methods benefit from low computational complexity, low signaling overhead and robustness to estimation errors. Moreover, they are applicable to both frequency and time division duplex systems.
| Original language | English |
|---|---|
| Title of host publication | 2018 IEEE Global Communications Conference (GLOBECOM) |
| Publisher | IEEE |
| ISBN (Electronic) | 9781538647271 |
| DOIs | |
| Publication status | Published - 21 Feb 2019 |
| Event | 2018 IEEE Global Communications Conference - Abu Dhabi, United Arab Emirates Duration: 9 Dec 2018 → 13 Dec 2018 |
Publication series
| Name | Global Communications Conference (GLOBECOM) |
|---|---|
| Publisher | IEEE |
| ISSN (Electronic) | 2576-6813 |
Conference
| Conference | 2018 IEEE Global Communications Conference |
|---|---|
| Abbreviated title | GLOBECOM 2018 |
| Country/Territory | United Arab Emirates |
| City | Abu Dhabi |
| Period | 9/12/18 → 13/12/18 |
Keywords
- hybrid beamforming
- Massive MIMO
- phase shifter selection
- quantized beamforming.
ASJC Scopus subject areas
- Information Systems and Management
- Renewable Energy, Sustainability and the Environment
- Safety, Risk, Reliability and Quality
- Signal Processing
- Modelling and Simulation
- Instrumentation
- Computer Networks and Communications
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