Effectiveness of implicit beamforming using calibration technique in massive MIMO system

Author

Nishimori, Kentaro ; Hiraguri, Takefumi ; Ogawa, Tomomi ; Yamada, Hiroyoshi

Author_Institution

Fac. of Eng., Niigata Univ., Niigata, Japan

fYear

2014

fDate

4-6 Aug. 2014

Firstpage

117

Lastpage

118

Abstract

This paper describes the effectiveness of implicit beamforming which enables the transmission without the channel state information (CSI) feedback in massive MIMO system. First, we explain the CSI feedback scheme from the terminal stations to base station gives a very large overhead. The calibration technique, which compensate the difference of complex amplitudes between transmitters and receivers for the implicit beamforming, is next introduced. Finally, the throughput by the IEEE802.11ac based massive MIMO transmission with and without CSI feedback is clarified when considering Medium Access Control efficiency.

Keywords

MIMO communication; array signal processing; calibration; wireless LAN; CSI feedback; IEEE 802.11ac; MIMO system; base station; calibration technique; channel state information feedback; complex amplitudes; implicit beamforming effectiveness; medium access control efficiency; Array signal processing; Base stations; Calibration; Channel state information; MIMO; Throughput; Transmitters; IEEE802.11ac; calibration; channel state information; implicit beamforming; massive MIMO;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics (iWEM), 2014 IEEE International Workshop on

Conference_Location

Sapporo

Type

conf

DOI

10.1109/iWEM.2014.6963664

Filename

6963664