Patent ID: 7292643
Filing Date: 2007-11-06
Classification: H04L

Abstract:
1. A method for transmitting data in a multi-input multi-output communications system having at least two transmit antennas and M r receive antennas, the data adapted to be transmitted via a channel having an associated channel matrix H with M r rows, wherein the number of columns of matrix H is the same as the number of transmit antennas, the method comprising: associating each u+n bits of the data with a symbol selected from 2 arranging the constellation points on the complex plane such that at least some of the arranged constellation points have real components that are distinct from real components of other arranged constellation points and wherein the at least some of the arranged constellation points have imaginary components that are distinct from imaginary components of the other arranged constellation points; transmitting only real components of each pair of associated symbols as an input stream on a first one of the at least two transmit antennas; and transmitting only imaginary components of each pair of associated symbols as a second input stream on a second one of the at least two transmit antennas.