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Design of New Quasi-Orthogonal Space-Time Block Code with Minimum Decoding Complexity  

Chae, Chang-Hyeon (전남대학교 전자컴퓨터공학부 광대역무선통신연구실)
Choi, Dae-Won (전남대학교 전자컴퓨터공학부 광대역무선통신연구실)
Jung, Tae-Jin (전남대학교 전자컴퓨터공학부 광대역무선통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.12A, 2007 , pp. 1219-1225 More about this Journal
Abstract
In this paper, we propose a new quasi-orthogonal space-time block code(QO-STBC) achieving full rate and full diversity for general QAM and quasi-static Rayleigh fading channels with four transmit antennas. This code possesses the quasi orthogonal property like the conventional minimum decoding complexity QO-STBC(MDC-QO-STBC), which allows independently a maximum likelihood(ML) decoding to only require joint detection of two real symbols. By computer simulation results, we show that the proposed code exhibits the identical BER performance with the existing MDC-QO-STBC. However, the proposed code has an advantage in the transceiver implementation since the original coding scheme may be modified so that increases of peak-to-average power ratio occur at only two transmit antennas, but the MDC-QO-STBC does at all of transmit antennas.
Keywords
Space Time Code; Transmit Diversity; PAPRs; Fading; QAM;
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