Block diagonalization using FFT beams at user terminal for implicit beamforming

Author

Hayate, Kimoto ; Nishimori, Kentaro ; Hiraguri, Takefumi ; Makino, Hiroaki

Author_Institution

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

fYear

2014

fDate

4-6 Aug. 2014

Firstpage

92

Lastpage

93

Abstract

Multiuser MIMO (MU-MIMO) improves the system channel capacity by employing the transmission between a base station (BS) and multiple user terminals (UTs). Block Diagonalization (BD) has been proposed as a practical algorithm in MU-MIMO broadcast channel. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. In this paper, FFT based orthogonal beam selection method at the UT, in order to apply the implicit beamforming (IBF) which can eliminate the channel state information (CSI) feedback from the UT to BS. Moreover, the BER performance is compared by the proposed method and conventional BD algorithm.

Keywords

MIMO communication; array signal processing; broadcast channels; channel capacity; error statistics; fast Fourier transforms; receiving antennas; transmitting antennas; BD algorithm; BER performance; BS; CSI feedback; FFT based orthogonal beam selection method; IBF; MU-MIMO broadcast channel; UT; base station; block diagonalization; channel state information; implicit beamforming; multiple user terminal; multiuser MIMO; receiving antennas; system channel capacity; transmitting antennas; Array signal processing; Bit error rate; Fading; MIMO; Receiving antennas; Signal to noise ratio; Transmitting antennas; Block Diagonalization (BD); FFT; Implicit beamforming (IBF); Multiuser MIMO;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics (iWEM), 2014 IEEE International Workshop on

Conference_Location

Sapporo

Type

conf

DOI

10.1109/iWEM.2014.6963651

Filename

6963651