US 7,260,153 C1 (12,984th)
Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels
Daniel Nathan Nissani, Tel Aviv (IL)
Filed by Daniel Nathan Nissani, Tel Aviv (IL)
Assigned to FLEET CONNECT SOLUTIONS LLC, Austin, TX (US)
Reexamination Request No. 90/019,765, Dec. 12, 2024.
Reexamination Certificate for Patent 7,260,153, issued Aug. 21, 2007, Appl. No. 10/423,447, Apr. 28, 2003.
Claims priority of provisional application 60/409,048, filed on Sep. 9, 2002.
Claims priority of provisional application 60/419,306, filed on Oct. 18, 2002.
Claims priority of provisional application 60/429,018, filed on Nov. 26, 2002.
Ex Parte Reexamination Certificate issued on Jul. 15, 2025.
Int. Cl. H04L 27/00 (2006.01); H04L 25/02 (2006.01)
CPC H04L 25/0204 (2013.01) [H04L 25/0242 (2013.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
The patentability of claims 1-3, 19 and 28-30 is confirmed.
Claims 4-18, 20-27 and 31-41 were not reexamined.
1. A method for evaluating a channel of a multiple-input multiple-output (MIMO) wireless communication system, wherein said communication system comprises at least two communication devices having a plurality of radiating elements for the parallel transmission of data sub-streams, comprising:
defining a channel matrix metric, said channel matrix metric comprising a respective predefined function of channel matrix singular values for each of said data sub-streams, such that each of said predefined functions provides a measure of cross-talk signal to noise ratio (SNR) for said respective sub-stream;
obtaining an estimated channel matrix;
performing a singular value decomposition (SVD) of said estimated channel matrix to obtain estimated channel singular values, said singular value decomposition comprising a left-hand unitary weighting matrix, a diagonal matrix of said estimated channel singular values, and a right-hand unitary weighting matrix; and
calculating a respective crosstalk measure for each of said sub-streams from said channel matrix metric and said estimated channel singular values.