Patent ID: 6801579
Filing Date: 2004-10-05
Classification: H04L

Abstract:
A method of wireless communication, comprising:(a) selecting at least one signal from a constellation of signals, wherein each signal in the constellation corresponds to a unitary matrix of elements arranged in rows and columns; (b) in a first time interval, transmitting a respective complex amplitude from each of two or more antennas, wherein said amplitudes are proportional to the respective elements of a row of the matrix corresponding to the selected signal; and (c) in at least one further time interval, transmitting a further respective complex amplitude from each of the two or more antennas, wherein said further amplitudes are proportional to the respective elements of a further row of the matrix corresponding to the selected signal; wherein the selecting step comprises making a selection from a signal constellation whose corresponding set of unitary matrices comprises at least one of the following: (I) a non-Abelian group, other than a quaternion group, having a positive diversity product; (II) a subset of a non-Abelian group, other than a guaternion group, having a positive diversity product, and having the further property that the multiplicative closure of said subset is a non-Abelian group having a positive diversity product; (III) a coset derived, from a group of the kind characterized in (I), by left multiplication, right multiplication, or left and right multiplication; or (IV) a coset derived, from a group subset of the kind characterized in (II), by left multiplication, right multiplication, or left and right multiplication.