Title :
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
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;
Conference_Titel :
Communications, 2004 IEEE International Conference on
Print_ISBN :
0-7803-8533-0
DOI :
10.1109/ICC.2004.1313138
