Research Article
A New Quasi-orthogonal Space-time Block Code
@INPROCEEDINGS{10.1109/CHINACOM.2006.344883, author={Xiao Liping and Xu Chengqian and Zhang Weifeng}, title={A New Quasi-orthogonal Space-time Block Code}, proceedings={1st International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2007}, month={4}, keywords={Low-complexity maximum-likelyhood (LC-ML) Orthogonal space-time block code Quasi-orthogonal space-time block code Wireless communication}, doi={10.1109/CHINACOM.2006.344883} }- Xiao Liping
Xu Chengqian
Zhang Weifeng
Year: 2007
A New Quasi-orthogonal Space-time Block Code
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2006.344883
Abstract
A full rate space-time block code (STBC) for four transmit antennas based on quasi-orthogonal design is proposed in this paper. The 4times4 transmission matrix of the presented quasi-orthogonal space-time block code (QOSTBC) is constructed based on Alamouti's scheme. The original maximum-likelihood (ML) decoding scheme and the low-complexity ML (LC-ML) decoding scheme for the new code are introduced. Then the decoding speed of them is compared. The simulation results show: the performance of the new code is better than that of orthogonal space-time block codes (OSTBC) at low SNR; it also exceeds the bit error rate (BER) of OSTBC at high SNR if the new code uses constellation rotation; the LC-ML decoding scheme is faster than the original ML decoding scheme.
