A New Quasi-orthogonal Space-time Block Code

Author

Liping, Xiao ; Chengqian, Xu ; Weifeng, Zhang

Author_Institution

Coll. of Inf. Sci. & Eng., YanShan Univ., Hebei

fYear

2006

fDate

25-27 Oct. 2006

Firstpage

1

Lastpage

5

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.

Keywords

antenna arrays; block codes; error statistics; matrix algebra; maximum likelihood decoding; orthogonal codes; radiocommunication; space-time codes; transmitting antennas; BER; QOSTBC; SNR; bit error rate; low-complexity ML decoding scheme; maximum-likelihood decoding scheme; quasi-orthogonal space-time block code; transmit antennas; Analytical models; Bit error rate; Block codes; Maximum likelihood decoding; Performance analysis; Random variables; Rayleigh channels; Receiving antennas; Transmitting antennas; Wireless communication; Low-complexity maximum-likelyhood (LC-ML); Orthogonal space-time block code; Quasi-orthogonal space-time block code; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking in China, 2006. ChinaCom '06. First International Conference on

Conference_Location

Beijing

Print_ISBN

1-4244-0463-0

Electronic_ISBN

1-4244-0463-0

Type

conf

DOI

10.1109/CHINACOM.2006.344883

Filename

4149848