United States Patent 7,602,855
Koo , et al. October 13, 2009
Method and apparatus for singular value decomposition of a channel matrix
Abstract
A method and apparatus for decomposing a channel matrix in a wireless communication system are disclosed. A channel matrix H is generated for channels between transmit antennas and receive antennas. A Hermitian matrix A=H.sup.HH or A=HH.sup.H is created. A Jacobi process is cyclically performed on the matrix A to obtain Q and D.sub.A matrixes such that A=QD.sub.AQ.sup.H. D.sub.A is a diagonal matrix obtained by singular value decomposition (SVD) on the A matrix. In each Jacobi transformation, real part diagonalization is performed to annihilate real parts of off-diagonal elements of the matrix and imaginary part diagonalization is performed to annihilate imaginary parts of off-diagonal elements of the matrix after the real part diagonalization. U, V and D.sub.H matrixes of H matrix are then calculated from the Q and D.sub.A matrices. D.sub.H is a diagonal matrix comprising singular values of the H matrix.
Inventors: Koo; Chang-Soo (Melville, NY), Olesen; Robert Lind (Huntington, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/392,025
Filed: March 29, 2006
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
60667326 Apr., 2005
Current U.S. Class: 375/267 ; 370/210; 370/480; 375/146; 375/226; 375/260; 708/200; 708/607
Current International Class: H04B 7/02 (20060101)
Field of Search: 375/267,260,146,226 708/607,200 370/210,480
