Kelly W Anderson

US Patent:

7555279, Jun 30, 2009

Filed:

Jul 24, 2006

Appl. No.:

11/491228

Inventors:

William Clark - Gilbert AZ, US
Kelly Don Anderson - Gilbert AZ, US
John Paul Sharrit - Fountain Hills AZ, US

Assignee:

General Dynamics C4 Systems - Scottsdale AZ

International Classification:

H04B 1/10

US Classification:

455311, 455324

Abstract:

Systems and methods for DC offset correction in analog and digital direct conversion RF receivers. A time derivate and subsequent integration of in-phase and quadrature phase signal path components is performed to effectively remove DC offset from the resultant down converted baseband signal.

US Patent:

7817979, Oct 19, 2010

Filed:

Mar 6, 2009

Appl. No.:

12/399688

Inventors:

William Clark - Gilbert AZ, US
Kelly Don Anderson - Gilbert AZ, US
John Paul Sharrit - Fountain Hills AZ, US

Assignee:

General Dynamics C4 Systems - Scottsdale AZ

International Classification:

H04B 1/10

US Classification:

455311, 455324

Abstract:

Systems and methods for DC offset correction in analog and digital direct conversion RF receivers. A time derivate and subsequent integration of in-phase and quadrature phase signal path components is performed to effectively remove DC offset from the resultant down converted baseband signal.

US Patent:

8098713, Jan 17, 2012

Filed:

Apr 14, 2008

Appl. No.:

12/102677

Inventors:

Robert John Baxley - Atlanta GA, US
John Eric Kleider - Atlanta GA, US
Kelly Anderson - Gilbert AZ, US

Assignee:

General Dynamics C4 Systems - Scottsdale AZ

International Classification:

H04B 1/00

US Classification:

375145, 375146, 375149, 375364, 370500, 370510

Abstract:

An embodiment for wirelessly communicating a signal includes a transmitter generating and transmitting a wireless signal over a wireless communication channel. The wireless signal includes a guard band, data represented within a plurality of data-bearing subcarriers, and a plurality of pilot signals represented within a plurality of pilot subcarriers. In an embodiment, the plurality of pilot signals have variable pilot signal parameters selected from a group of parameters that includes pilot power and pilot spacing with respect to adjacent pilots. An embodiment further includes a receiver receiving a channel-affected version of the wireless signal, and producing a corrected signal by applying corrections to the received signal based on estimated channel perturbations within the received signal, where the estimated channel perturbations are determined based on the plurality of pilot signals. The receiver also produces an output data symbol from the corrected signal.