Wireless communications
First Claim
Patent Images
1. A method of wireless communication, comprising:
- (a) estimating at least one eigenvector of a matrix of communication channel coefficients for a channel between a first plurality of antennas and a second plurality of antennas; and
(b) transmitting using said first plurality of antennas with the relative weightings of baseband signals on said first plurality of antennas corresponding to components of said at least one eigenvector.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless system (e.g., Bluetooth, WCDMA, etc.) with multiple antenna communication channel eigenvector weighted transmissions including possibly differing order symbol constellations for differing eigenvectors. Comparison of maximizations of minimum received symbol distances provides for selection of eigenvector combinations and symbol constellations.
-
Citations
12 Claims
-
1. A method of wireless communication, comprising:
-
(a) estimating at least one eigenvector of a matrix of communication channel coefficients for a channel between a first plurality of antennas and a second plurality of antennas; and
(b) transmitting using said first plurality of antennas with the relative weightings of baseband signals on said first plurality of antennas corresponding to components of said at least one eigenvector. - View Dependent Claims (2, 3, 4)
-
-
5. A method of wireless communication, comprising:
-
(a) estimating eigenvectors of a matrix of communication channel coefficients between a transmitter with M antennas (M an integer greater than
1) and a receiver with N antennas (N an integer greater than
1); and
(b) transmitting on said communication channel baseband signals x1, . . . , xK (K a positive integer) with the relative weightings of each of said signals among said antennas corresponding to components of a linear combination of said eigenvectors of said matrix;
(c) wherein said linear combinations of said signals maximize the minimum distance between received different signals at a receiver. - View Dependent Claims (6, 7, 8)
-
-
9. A transmitter, comprising:
-
(a) antennas A1, . . . , AM where M is a positive integer greater than 1;
(b) a channel analyzer coupled to said antennas and operable to estimate eigenvalues and eigenvectors of an M×
M matrix derived from coefficients of a communication channel from said antennas to a receiver;
(c) a signal generator coupled to said antennas and to said channel analyzer and operable to apply signals S1, . . . , SM to said antennas A1, . . . , AM, respectively;
wherein said signals are proportional to the components of a linear combination of said estimated eigenvectors. - View Dependent Claims (10, 11, 12)
-
Specification