A Parallel Decoding Algorithm of Quasi-Othogonal Space-Time Code
Guo Yong · Coal Technology · 2010
In this paper,a new encoding and decoding scheme is proposed for Quasi-Orthogonal Space-Time Block Code(QOSTBC) with 4 transmit antennas and 1 receive antenna.The new scheme can overcome the defects of traditional scheme that QOSTBC can not obtain full diversity gain and it's high decoding complexity.In the new scheme,QOSTBC is transmited after two-dimensional constellation rotation at transmiter and channel matrix is diagonalized in manner of weighted matrix based on quasi-orthogonality of equivalent channel matrix at receiver.The new scheme achieves independent decoding of imaginary part and real part of transmit symbols at the same time.Compared with the traditional decoding algorithm and QR decomposition decoding algorithm,the new scheme can simplify decoding algorithm,improve decoding speed and decrease bit error rate of system.