| US 7,613,248 B2 | ||
| Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems | ||
| John W. Ketchum, Harvard, Mass. (US); and Jay R. Walton, Westford, Mass. (US) | ||
| Assigned to QUALCOMM Incorporated, San Diego, Calif. (US) | ||
| Filed on Jun. 24, 2002, as Appl. No. 10/179,442. | ||
| Prior Publication US 2003/0235255 A1, Dec. 25, 2003 | ||
| Int. Cl. H04L 27/00 (2006.01); H03K 9/00 (2006.01) | ||
| U.S. Cl. 375—296 [375/295; 375/297; 375/299; 375/316; 375/346; 375/347; 375/349] | 36 Claims |
| 1. In a multiple-input multiple-output (MIMO) communication system, a method for processing data for transmission over a MIMO
channel, comprising:
processing data in accordance with a particular processing scheme to provide a plurality of streams of modulation symbols;
deriving a pulse-shaping matrix based on an estimated channel response matrix of the MIMO channel and a plurality of scaling
values used to adjust transmit rower for the MIMO channel, which are based on a plurality of matrices of singular values,
wherein the pulse-shaping matrix comprises a plurality of time-ordered sequences of values; and
preconditioning, according to at least a convolution operation, the plurality of modulation symbol streams, based on the pulse-shaping
matrix to provide a plurality of streams of preconditioned symbols for transmission over the MIMO channel.
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