Patent ID: 8553794

Claim:
A space-time block code (STBC) transmission method for 4 transmit antennas, comprising: performing a first precoding by applying a first 2×2 orthogonal pre-coding matrix to a first pair of transmit symbols, S 0 and S 1 ; performing a second precoding by applying a second 2×2 orthogonal pre-coding matrix to a second pair of transmit symbols S 2 and S 3 , wherein said first and second precoding generates two pairs of precoded output symbols, (C 0 , C 1 ) and (C 2 , C 3 ); and interleaving said two pairs of precoded output symbols to form cross-wise pairs of said precoded output symbols (C 0 , C 2 ) and (C 1 , C 3 ), wherein the interleaving generates a STBC transmission matrix for a two Alamouti transmission for a 4 transmit antennas scheme that enables simple, linear decoding.