Abstract:

With thinking of soft symbol interference cancellation, a Gaussian approximation method and minimum mean square error (MMSE) method are proposed to obtain the soft information of each bit. According to the transmission property of Golden code, the methods are deduced to compute the soft information in the system. Analysis indicates that, compared with the traditional list sphere decodemaxinum a posteriori(LSDMAP) method, the Gaussian approximation method and the MMSE method have lower complexity. Simulations show that the iterative detection performance of proposed methods is close to the LSDMAP method, which achieve a fast iterative detection of Golden code.

Key words: Golden code, Gaussian approximation, minimum mean square error, sphere decoding