METHOD FOR THE ORTHOGONAL AND OFFSET TRANSMISSION-RECEPTION OF A SIGNAL AND DEVICE FOR REALISING THE SAME

According to the method of the present invention, an information stream of binary symbols is divided into serial packets of N binary symbols. The method further involves carrying out a serial-parallel conversion of the binary symbols in each serial packet and repeating N times the parallel packet thus obtained in order to form a serial-parallel packet of binary symbols. The binary symbols are permuted in the duration interval of each serial-parallel packet, and orthogonal codes generated according to the above binary symbol permutation are then applied. A space diversity channel is then allocated to each serial group of the serial-parallel packet of coded binary symbols thus obtained. All the serial groups of coded binary symbol, each coded binary symbol having been previously spread by a user spreading code, as well as pilot signals of the corresponding space diversity channels are simutaneously transmitted. The method also involves generating on the reception side a serial packet of soft decisions that corresponds to the serial packet of binary symbols on the transmission side. According to the method of the present invention, an information flow of binary symbols is divided into series packets of N binary symbols. The method further involves carrying out a series-parallel conversion of the binary symbols in each series packet and repeating N times the parallel packet thus obtained in order to form a series-parallel packet of binary symbols. The binary symbols are permuted in the duration interval of each series-parallel packet, and orthogonal codes generated according to the above binary symbol permutation are then applied. A spatially offset channel is then allocated to each series group of the series-parallel packet of binary symbols thus obtained. All series groups of coded binary symbols are transmitted simultaneously after having previously spread each coded binary symbol, using a user's spreading code, as well as the pilot signals of the corresponding spatially offset channels. The method also involves generating on the reception side a series packet of flexible solutions that corresponds to the series packet of binary symbols on the transmission side. D'après cette invention, un flux d'informations de symboles binaires est divisé en des paquets série de N symboles binaires. On effectue une conversion série-parallèle des symboles binaires de chaque paquet série, et l'on répète N fois le paquet parallèle ainsi obtenu de manière à former un paquet s