US 6,983,264 B2
Signal separation method and apparatus for restoring original signal from observed data
Junya Shimizu, Yokohama (Japan)
Assigned to International Business Machines Corporation, Armonk, N.Y. (US)
Filed on Oct. 25, 2001, as Appl. No. 10/45,271.
Claims priority of application No. 2001-335122 (JP), filed on Nov. 01, 2000.
Prior Publication US 2002/0136328 A1, Sep. 26, 2002
Int. Cl. G06F 15/18 (2006.01)
U.S. Cl. 706—22 35 Claims
OG exemplary drawing
 
1. A signal separation method comprising restoring an original signal from observed data, obtained by observing multiple mixed signals, including the steps of:
estimating, from said observed data, a separation matrix using an adaptive filter that suppresses the H-infinity norm concerning said separation matrix until the H-infinity norm is equal to or smaller than a provided scalar value; and
restoring said original signal by multiplying said separation matrix by said observed data.