Quantized beamforming in Massive MIMO

Author

Hong Yang ; Marzetta, Thomas L.

Author_Institution

Bell Labs., Alcatel-Lucent, Murray Hill, NJ, USA

fYear

2015

fDate

18-20 March 2015

Firstpage

1

Lastpage

6

Abstract

We investigate the effects of quantized beamforming on the capacity of a Massive MIMO by deriving explicit performance formulas. Our approach is applicable to a large class of quantizations, including PSK, QAM and polar quantizations. We show that with any degree of quantization, the beamforming gain grows linearly with the number of transmit antennas. Our results have important implications for the practical design and implementation of Massive MIMO as they indicate quantitatively the feasibility of highly economical A/D and D/A converters with very low resolutions.

Keywords

MIMO communication; antenna arrays; array signal processing; phase shift keying; quadrature amplitude modulation; quantisation (signal); transmitting antennas; A-D converters; D-A converters; PSK; QAM; beamforming gain; massive MIMO base station; phase shift keying; polar quantizations; quadrature amplitude modulation; quantized beamforming; transmit antennas; Array signal processing; Channel estimation; Interference; MIMO; Phase shift keying; Quantization (signal); Signal to noise ratio; Massive MIMO; conjugate beamforming; quantized beamforming;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Sciences and Systems (CISS), 2015 49th Annual Conference on

Conference_Location

Baltimore, MD

Type

conf

DOI

10.1109/CISS.2015.7086866

Filename

7086866