Massive MIMO Combining with Switches

Massive multiple-input multiple-output (MIMO) is expected to play a central role in future wireless systems. The deployment of large antenna arrays at the base station and the mobile users offers multiplexing and beamforming gains that boost system spectral efficiency. Unfortunately, the high cost a...

Full description

Saved in:
Bibliographic Details
Published in:IEEE wireless communications letters 2016-06, Vol.5 (3), p.232-235
Main Authors: Alkhateeb, Ahmed, Nam, Young-Han, Zhang, Jianzhong, Heath, Robert W.
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Antennas
Massive MIMO
MIMO
Phase shifters
quasi-coherent combining
Radio frequency
Receivers
Signal to noise ratio
switches-based hybrid combining
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Massive multiple-input multiple-output (MIMO) is expected to play a central role in future wireless systems. The deployment of large antenna arrays at the base station and the mobile users offers multiplexing and beamforming gains that boost system spectral efficiency. Unfortunately, the high cost and power consumption of components like analog-to-digital converters makes assigning an RF chain per antenna and applying typical fully digital precoding/combining solutions difficult. In this letter, a novel architecture for massive MIMO receivers, consisting of arrays of switches and constant (non-tunable) phase shifters, is proposed. This architecture applies a quasi-coherent combining in the RF domain to reduce the number of required RF chains. An algorithm that designs the RF combining for this architecture is developed and analyzed. Results show that the proposed massive MIMO combining model can achieve a comparable performance to the fully digital receiver architecture in single-user and multiuser massive MIMO setups.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2016.2522963