Patent ID: 7460581

Claim:
A method for transmitting, via a first pair of antennas and at least one second pair of antennas, encoded digital symbols produced according to a modulation scheme, the method comprising: organizing digital symbols in sets, at least one set of the sets of symbols that is used for transmission via said at least one second pair of antennas being swapped temporally by subsets of symbols with respect to the digital symbols used for transmission via said first pair of antennas; using for transmission via said first pair of antennas a signal obtained by subjecting said organized digital symbols to spreading with a code-division-multiple-access code, to space-time coding, to scrambling with a scrambling code, and to adding with respective pilot flows for channel estimation; using for transmission via said at least one second pair of antennas a signal obtained by subjecting said swapped temporally set of symbols to spreading with a code-division-multiple-access code, to space-time coding, to scrambling with a scrambling code, and to adding with respective pilot flows for channel estimation, wherein at least one between said code-division-multiple-access code and said scrambling code used for the transmission via said at least one second pair of antennas is different from the code-division-multiple-access code and said scrambling code used for the transmission via said first pair of antennas; using, in addition to said first pair of antennas, a plurality of second pairs of antennas, sets of symbols used for transmission via said plurality of second pairs of antennas being swapped temporally by subsets of symbols with respect to the digital symbols used for transmission via said first pair of antennas; and using, for transmission via said plurality of second pairs of antennas, signals obtained by subjecting said swapped temporally sets of symbols to spreading with respective code-division-multiple-access codes, to space-time coding, to scrambling with respective scrambling codes, and to adding with respective pilot flows for channel estimation; wherein at least one between said respective code-division-multiple-access codes and said respective scrambling codes used for transmission via said plurality of second pairs of antennas is different from the code-division-multiple-access code and said scrambling code used for transmission via said first pair of antennas.