Patent ID: 7170948
Filing Date: 2007-01-30
Classification: H03M,H04L

Abstract:
1. A method of coding a digital data stream coded by spatio-temporal combinations in multiple transmission and reception through a frequency selective channel, wherein said method comprises, on the basis of an initial digital data stream: subjecting said initial digital data stream to an outer coding by means of a first code of specified rate, so as to generate a coded digital stream; subjecting said coded digital stream, subdivided into successive blocks, to a blockwise interleaving process so as to generate a coded and interleaved digital stream; subjecting said coded and interleaved digital stream to a demultiplexing, said coded and interleaved digital stream being thus subdivided into a given number of elementary interleaved coded digital streams; subjecting each elementary interleaved coded digital stream to an inner coding by means of at least one second code of specified rate, said at least one second code comprising a code of the spatio-temporal trellis coded modulation type, so as to generate a set of elementary digital streams, coded by spatio-temporal combinations; transmitting each elementary digital stream comprising symbols over a transmission channel by means of a distinct transmission antenna, the set of said transmission antennas forming a space-diversity array, so as to generate a set of transmitted elementary digital streams exhibiting spatial and temporal diversity, thereby making it possible, on reception, to perform a decoding of the digital data stream coded by spatio-temporal combinations and comprised of said set of transmitted elementary digital streams, on the basis of a priori information representative of the spatial and temporal diversity.