Patent ID: 7586979
Filing Date: 2009-09-08
Classification: H04L

Abstract:
1. 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 a set, said set of symbols including subsets of pairs of symbols that are used for transmission via said at least one second pair of antennas, said subsets being swapped temporally with respect to subsets of symbols that are 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, then to space-time coding, then to scrambling with a scrambling code, and then to adding with respective pilot flows for channel estimation; and using for transmission via said at least one second pair of antennas a signal obtained by subjecting said swapped temporally subsets of symbols to spreading with a code-division-multiple-access code, then to space-time coding, then to scrambling with a scrambling code, and then 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.