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Performance Evaluation of Fill Rate Quasi-orthogonal STF-OFDM with DAC-ZF Decoder for Four Transmit Antennas MIMO System  

Jin, Ji-Yu (영남대학교 정보통신공학과 이동통신연구실)
Ryu, Kwan-Woong (영남대학교 정보통신공학과 이동통신연구실)
Park, Yong-Wan (영남대학교 정보통신공학과 이동통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.11A, 2006 , pp. 1092-1100 More about this Journal
Abstract
In this paper, we propose a full rate quasi-orthogonal space-time-frequency block coded orthogonal frequency division multiplexing(QOSTF-OFDM) that can achieve full symbol rate with four transmit antennas. Sincr: the proposed QOSTF-OFDM can not achieve full diversity, we use diversity advantage collection with zero forcing (DAC-ZF) decoder to compensate the diversity loss at receive side. At the same frequency efficiency, compared with linear orthogonal space-time codes which can not achieve full rate with four transmit antennas over complex constellations, low level modulation can be employed by proposed scheme due to its full rate, i.e., modulation advantage can be achieved. Due to modulation advantage and collected diversify advantage, the proposed scheme exhibits better BER performance than other orthogonal schemes.
Keywords
MIMO; MIMO-OFDM; STBC; STFBC; QOSTF-OFDM;
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