Full-duplex MIMO system based on antenna cancellation technique

Author

Foroozanfard, E. ; Franek, Ondrej ; Tatomirescu, Alexandru ; Tsakalaki, E. ; de Carvalho, Elisabeth ; Pedersen, Gert F.

Author_Institution

Dept. of Electron. Syst., Aalborg Univ., Aalborg, Denmark

Volume

50

Issue

16

fYear

2014

fDate

July 31 2014

Firstpage

1116

Lastpage

1117

Abstract

The performance of an antenna cancellation technique for a multiple-input-multiple-output (MIMO) full-duplex system that is based on null-steering beamforming and antenna polarisation diversity is investigated. A practical implementation of a symmetric antenna topology comprising three dual-polarised patch antennas operating at 2.4 GHz is described. The measurement results show an average of 60 dB self-interference cancellation over 200 MHz bandwidth. Moreover, a decoupling level of up to 22 dB is achieved for MIMO multiplexing using antenna polarisation diversity. The performance evaluation of the proposed technique was performed by simulation and measurement and the results have good agreement.

Keywords

MIMO communication; UHF antennas; array signal processing; electromagnetic wave polarisation; interference suppression; microstrip antenna arrays; radiofrequency interference; radiotelemetry; MIMO full-duplex system; antenna cancellation technique; antenna polarisation diversity; dual-polarised patch antenna; frequency 2.4 GHz; gain 60 dB; multiple-input-multiple-output full-duplex system; multiplexing; null-steering beamforming; performance evaluation; self-interference cancellation; symmetric antenna topology;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.1650

Filename

6870588