Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2008-03-04
2008-03-04
Corrielus, Jean B. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
10663136
ABSTRACT:
The invention is directed to a system for determining a transfer function for emphasizing an electromagnetic signal prior to being processed by determining a discrete transfer function for a processing system, such as a wideband phase modulator; determining a target transfer function such that the target transfer function multiplied by the inverse of the discrete transfer function produces a discrete pre-emphasis transfer function; and transforming any unstable poles and/or zeros in the pre-emphasis transfer function to stable poles and/or zeros. The discrete transfer function may be determined, for example, by using an S-function, input and output signals, the inverse-invariant method, and/or the Steiglitz-McBride algorithm. The transformation of the unstable poles and/or zeros may be accomplished using an all pass filter. The target transfer function may be a low pass FIR filter having a gain of about unity across substantially all of the frequency range of said FIR filter.
REFERENCES:
patent: 4629995 (1986-12-01), Katakura
patent: 5386590 (1995-01-01), Dolan
patent: 5420536 (1995-05-01), Faulkner et al.
patent: 5524286 (1996-06-01), Chiesa et al.
patent: 5598436 (1997-01-01), Brajal et al.
patent: 5687101 (1997-11-01), Lee
patent: 5905760 (1999-05-01), Schnabl et al.
patent: 5952895 (1999-09-01), McCune, Jr. et al.
patent: 6043707 (2000-03-01), Budnik
patent: 6094101 (2000-07-01), Sander et al.
patent: 6125266 (2000-09-01), Matero et al.
patent: 6140882 (2000-10-01), Sander
patent: 6147553 (2000-11-01), Kolanek
patent: 6255912 (2001-07-01), Laub et al.
patent: 6324220 (2001-11-01), Sellars
patent: 6335767 (2002-01-01), Twitchell et al.
patent: 6449465 (2002-09-01), Gailus et al.
patent: 6621340 (2003-09-01), Perthold et al.
patent: 6674856 (2004-01-01), Hendricks et al.
patent: 6834084 (2004-12-01), Hietala
patent: 6940916 (2005-09-01), Warner et al.
patent: 2002/0098812 (2002-07-01), Sourour et al.
patent: 2002/0186783 (2002-12-01), Opas et al.
patent: 2002/0193085 (2002-12-01), Mathe et al.
patent: 2003/0031267 (2003-02-01), Hietala
patent: 2003/0095608 (2003-05-01), Duperray
patent: 2003/0215025 (2003-11-01), Hietala
patent: 2003/0215026 (2003-11-01), Hietala
patent: 2004/0008793 (2004-01-01), Mujica et al.
patent: 2004/0021517 (2004-02-01), Irvine et al.
patent: 2004/0047432 (2004-03-01), Iwasaki
patent: 2005/0017801 (2005-01-01), Bachman, II et al.
patent: 2005/0122164 (2005-06-01), Brandt et al.
patent: 1 122 893 (2001-08-01), None
patent: 2 373 420 (2002-09-01), None
Corrielus Jean B.
M/A-COM, Inc.
LandOfFree
Apparatus, methods and articles of manufacture for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus, methods and articles of manufacture for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus, methods and articles of manufacture for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3915821