Patent ID: 8254492
Filing Date: 2012-08-28
Classification: H04L

Abstract:
1. A method for data transmission, the method comprising: modulating data to be transmitted into a plurality of modulated symbols; dividing the plurality of modulated symbols into a plurality of subsets of modulated symbols, with each subset having N modulated symbols, and N being an integer no smaller than 2; encoding each subset of modulated symbols in accordance with a transmission diversity scheme to produce a plurality of N by N matrices, with each N by N matrix corresponding to each subset of modulated symbols; generating a first M by M code matrix comprising the plurality of N by N matrices, with M=N×X and X is the number of the plurality of N by N matrices; orthogonally spreading the first M by M code matrix to generate a first output matrix; transmitting the symbols in the first output matrix via a plurality of antennas in a first time slot; generating a second M by M code matrix by exchanging at least one selected pair of rows in the first M by M code matrix; orthogonally spreading the second M by M code matrix to generate a second output matrix; and transmitting the symbols in the second output matrix via the plurality of antennas in a second time slot.