Abstract:

To increase transmission efficiency, a soft-information-based Turbo equalization algorithm is proposed for the space-frequency block code orthogonal frequency-division multiplexing (SFBC-OFDM) system without cyclic prefix (CP). In our algorithm, processing modules as inter-symbol interference cancellation, soft cyclic reconstruction, diagonalized SFBC decoder and minimum mean square error frequency domain equalizer are proposed to work in an iterative way to suppress interferences. Simulation results show that this algorithm can improve the bit error rate performance of SFBC-OFDM system without CP.

Key words: orthogonal frequency-division multiplexing, Turbo equalization, space-frequency block code