Abstract: A transceiving system using a joined modulation alphabet A having a size M the symbols of which are distributed on a plurality N of orthogonal dimensions, the symbols carried by a dimension belonging to a linear sub-alphabet An having a size P, with M=NP. The transmitter performs a turbocoding of a block of information bits, the code words provided by the turbocoder being mapped to symbols of the joined modulation alphabet before modulating the signal to be transmitted. The receiver performs turbodecoding from the projection of the symbols received on the orthogonal dimensions of the alphabet.

Abstract: A transceiving system using a joined modulation alphabet A having a size M the symbols of which are distributed on a plurality N of orthogonal dimensions, the symbols carried by a dimension belonging to a linear sub-alphabet An having a size P, with M=NP. The transmitter performs a turbocoding of a block of information bits, the code words provided by the turbocoder being mapped to symbols of the joined modulation alphabet before modulating the signal to be transmitted. The receiver performs turbodecoding from the projection of the symbols received on the orthogonal dimensions of the alphabet.

Abstract: A conjoint detection device for UMTS/TDD mobile radio telephone terminal receiver processes a received signal having symbols coded in accordance with K CDMA codes and having passed through a propagation channel with Lt multiple paths. The device has two channels each imposing Lt/2 respective delays and each having K filtering branches. Each filtering branch correlates Lt/2 delayed sample sequences to a respective code and to Lt/2 estimated path coefficients in order to sum Lt/2 coefficients correlated in this way sampled at the symbol period. 2K equalization filters then equalize linearly the 2K correlated signals, depending on an associated code, before they are summed at the output of the two channels. Thanks to the division into two channels, there are sufficient degrees of freedom to cancel the interference out exactly for a finite depth of the 2K equalization filters greater than twice the duration of the propagation channel.