Patent ID: 8223874

Claim:
System for transmitting data from a transmitter comprising: at least two transmitting antennas, an encoder following an error correcting code structure and a transmit beamforming technique to a receiver comprising at least two receiving antennas and a decoder defined according to the error correcting code structure over a transmit beamformed MIMO channel, wherein the coding rate R c , of the encoder, five parameters of said transmit beamformed MIMO channel and a target diversity order of the system are selected dependently one from each other, the transmitter comprising a digital modulator converting the coded bits stream into spatial streams of modulation symbols, the output of said digital modulator being vectors of N s modulation symbols (Z(i)), wherein the transmitter further comprises an algebraic linear precoder, a parameter s of which being called the precoding size, which verifies s≦N s , intended to linearly combine together s modulation symbols (Z(i)) of a same vector (Z) of modulation symbols, called combined modulation symbols and to provide an output vector (X) of precoded symbols (X(i)) associated to one transmission over the transmit beamformed MIMO channel, wherein the precoded symbols (X(i)) of said output vector (X) are obtained by the product of a vector (Z) of modulation symbols by a complex linear matrix S, said complex linear matrix S is given by S = P 1 ⁡ [ S ′ 0 0 I ] ⁢ P 2 where P 1 and P 2 are permutation matrices and S′ is a s×s matrix which satisfies that if a vector of s modulation symbols is multiplied by the matrix S′, sent through a diagonal noisy Rayleigh fading channel of size s×s, and decoded by a maximum likelihood decoder, then the diversity order of the performance equals to s.