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

• Published in: 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577) Vol. 6; pp. 3217 - 3220 Vol.6
• Main Authors: KO, Eunseok, HONG, Daesik
• Format: Conference Proceeding
• Language: English
• Published: Piscataway, New Jersey IEEE 2004
• Subjects: Applied sciences; Bit error rate; Block codes; Coding, codes; Conferences; Diversity methods; Exact sciences and technology; Fading; Finite impulse response filter; Frequency diversity; Information technology; Information, signal and communications theory; Maximum likelihood decoding; Multiplexing; OFDM; Signal and communications theory; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Transmitting antennas; Fading channels; Performance evaluation; Fading; Block code; Space-time codes; Bit error rate; Space diversity; Frequency domain method; Spatial frequency; Frequency selection; Simulation; Transmitting antenna; Orthogonal frequency division multiplexing; Frequency diversity
• ISBN: 0780385330; 9780780385337
• DOI: 10.1109/ICC.2004.1313138

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.