Method and system of iterative coding/decoding of digital data streams coded by spatio-temporal combinations, in multiple transmission and reception

摘要

The invention relates to a method of coding and of decoding a digital data stream coded by spatio-temporal combinations, in multiple transmission and reception. On transmission, the initial stream (IDS) is subjected to an outer coding (A), a blockwise interleaving (B), a demultiplexing (C) over a plurality of pathways, to an inner coding Xi_m on each pathway, then transmitted on a plurality (nu) of distinct antennas forming a space-diversity array. On reception, the coded symbol streams transmitted are observed (F) by means of a number nu of reception antennas which is independent of the number of transmission antennas, the observed coded symbol streams ${\left\{{\mathrm{MSDS}}_r\right\}}_{r=1}^{r=\mathrm{rho}}$ are subjected to a process of turbo-detection by equalization and joint decoding (G), deinterleaving (H), outer decoding (I), interleaving (J), so as to generate an a priori information item (api) on the coded bits, which is reinjected (K) into the turbo-detection process. Application to the implementation of a universal radiofrequency interface, in particular for mobile radio telephony.