Improved space-time block coding with frequency diversity for OFDM systems

Author

Ko, Eunseok ; Hong, Daesik

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

6

fYear

2004

fDate

20-24 June 2004

Firstpage

3217

Abstract

Exploiting the effect of frequency diversity based on the frequency-domain channel correlation of OFDM systems, we propose an improved space-time block coding with frequency diversity for OFDM systems in frequency selective fading channels. With only two transmit antennas, the proposed scheme can achieve a fourth-order diversity gain at low complexity. Simulation results for the proposed scheme demonstrate that this joint exploitation of spatial diversity and frequency diversity leads to a remarkable improvement in BER performance.

Keywords

OFDM modulation; antenna arrays; block codes; correlation theory; diversity reception; error statistics; fading channels; frequency-domain analysis; maximum likelihood decoding; space-time codes; transmitting antennas; BER performance; ML decoding; OFDM systems; fourth-order diversity gain; frequency selective fading channels; frequency-domain channel correlation; frequency-spatial diversity; space-time block coding; transmit-receive antennas; Bit error rate; Block codes; Diversity methods; Fading; Finite impulse response filter; Frequency diversity; Information technology; Maximum likelihood decoding; OFDM; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2004 IEEE International Conference on

Print_ISBN

0-7803-8533-0

Type

conf

DOI

10.1109/ICC.2004.1313138

Filename

1313138