Performance analysis of multiple-input multiple-output orthogonal frequency division multiplexing systems under the influence of antenna mutual coupling effect

Author

Lu, Siyu ; Hui, Hon Tat ; Bialkowski, M.

Author_Institution

Sch. of Inf. Technol. & Electr. Eng., Univ. of Queensland, St. Lucia, QLD

Volume

3

Issue

2

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

288

Lastpage

295

Abstract

The effect of antenna mutual coupling on signal correlation and bit error rate (BER) of a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system has been modelled. A MIMO-OFDM model with correlated channels is presented. The correlation matrices are determined with the antenna mutual coupling taken into account. The effect of antenna mutual coupling is characterised using the receiving and transmitting mutual impedances. A rigorous expression for the BER of the system employing quadrature phase-shift keying digital modulation is derived. A 2times2 MIMO-OFDM system using the Alamouti space-time block code for OFDM symbol transmission over 64 sub-channels spanning a 20 MHz band centred at 5.2 GHz is simulated. The simulated results show that the antenna mutual coupling has a significant effect on the BER performance, especially when the spacing between the antenna elements is small.

Keywords

MIMO communication; OFDM modulation; antenna arrays; block codes; error statistics; matrix algebra; quadrature phase shift keying; space-time codes; Alamouti space-time block code; BER; MIMO; OFDM; antenna mutual coupling effect; bandwidth 20 MHz; bit error rate; correlation matrices; frequency 5.2 GHz; multiple-input multiple-output systems; orthogonal frequency division multiplexing systems; quadrature phase-shift keying digital modulation;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map:20070302

Filename

4797773