Kevin Baum

US Patent:

6385462, May 7, 2002

Filed:

May 26, 2000

Appl. No.:

09/579984

Inventors:

Kevin Lynn Baum - Rolling Meadows IL
Brian Keith Classon - Streamwood IL
Philippe Jean-Marc Sartori - Schaumburg IL
Theresa Ann Fry - Lake Zurich IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 720

US Classification:

455522, 455 69, 455 673, 455 63

Abstract:

A method and system ( ) for providing criterion based adaptive power allocation with selective determination of modulation and coding is provided. A method is presented which consists of providing adaptive power allocation with a target signal quality for each link based on a system criterion, and a modulation/coding rate for each link based on a signal quality associated with the transmit power of each link. A further method is provided which may alternatively, or additionally, consist of APA in which the transmit power for each link is assigned in an attempt to obtain a signal quality for each link within a range between or equal to a minimum and maximum. An additional method is disclosed consisting of APA in which the transmit power for each link is assigned in an attempt to obtain a signal quality for each link as close as possible to a common signal quality, when the power allocation method has a limited dynamic range. The method and system ( ) of the present invention may be implemented in a wireless communication system ( ) in any number of formats, such as code division multiple access or time division multiple access.

US Patent:

6683916, Jan 27, 2004

Filed:

Jul 17, 2002

Appl. No.:

10/197382

Inventors:

Philippe Jean-Marc Sartori - Algonquin IL 60102
Kevin Lynn Baum - Rolling Meadows IL 60008
Brian Keith Classon - Palatine IL 60067

International Classification:

H04L 2704

US Classification:

375295, 375377

Abstract:

In accordance with the preferred embodiment of the present invention, excess power is distributed to certain streams in order to increase the streams signal quality, and thus, its encoding rate. Although certain streams will have their overall power, and thus their signal quality reduced, in the preferred embodiment of the present invention the reduction in signal quality is limited so that the encoding rate for these streams remains unchanged.

US Patent:

6754169, Jun 22, 2004

Filed:

Dec 13, 2001

Appl. No.:

10/022295

Inventors:

Kevin Lynn Baum - Rolling Meadows IL
Vijay Nangia - Schaumburg IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 2302

US Classification:

370204, 370206, 370436, 375261, 375347, 375130

Abstract:

The present invention provides a method of operation for a variable transmission mode multi-carrier communication system by receiving a signal, determining a link quality as a function of the received signal, and selecting a compound multi-carrier communication mode as a function of the link quality.

US Patent:

6865393, Mar 8, 2005

Filed:

Mar 3, 2000

Appl. No.:

09/518160

Inventors:

Kevin Lynn Baum - Rolling Meadows IL, US
Brian Keith Classon - Streamwood IL, US
Philippe Jean-Marc Sartori - Schaumburg IL, US
Theresa Ann Fry - Lake Zurich IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q007/20

US Classification:

4554522, 4554521, 455 6713, 455 6711, 455522, 375261, 375298

Abstract:

A method and system () provide adaptive modulation/coding with distribution of excess resources based on one or more system criteria. The system () may be any system with more than one modulation rate or more than one coding rate and may be a wireless communication system using CDMA, TDMA, OFDM or any other signal formats. Generally, the method determines excess resources of the system based on desired characteristics of links supported by the system. The excess resources may be any number of system resources, such as transmit power. These excess resources are then distributed to the links based on various system criteria, such as to increase system coverage, to increase system capacity, to modify a data rate profile of the system or to reduce interference in the system. Methods for providing such distribution of the excess resources are also provided for equal data rate systems.

US Patent:

6885708, Apr 26, 2005

Filed:

Jul 18, 2002

Appl. No.:

10/198487

Inventors:

Timothy A. Thomas - Palatine IL, US
Vijay Nangia - Schaumburg IL, US
Kevin L. Baum - Rolling Meadows IL, US
Frederick W. Vook - Schaumburg IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L027/28

US Classification:

375260, 370208

Abstract:

A receiver for implementing a training prefix modulation method in response to a reception of a signal propagating through a channel is disclosed. The signal as received includes training blocks with each training block having a data inter-block-interference therein, and data blocks with each data block having a training inter-block-interference therein. The signal is selectively reconstructed to provide a circular appearance of the channel over the data blocks. Specifically, an estimate of the training inter-block-interferences is generated and subtracted from the data blocks. And, an estimate of the data inter-block interferences is generated and added to the data blocks.

US Patent:

6959050, Oct 25, 2005

Filed:

Jun 15, 2001

Appl. No.:

09/882840

Inventors:

Kevin L. Baum - Rolling Meadows IL, US
Nikhil S. Nadgauda - Hoboken NJ, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L027/14
H04L027/06

US Classification:

375326, 375316, 375324

Abstract:

An apparatus () for and method of synchronizing OFDM signals utilizes a single baud to provide synchronization in time, frequency, and per-subcarrier rotation (). Timing and fractional subcarrier frequency synchronization may be obtained from either a known or unknown (e. g. , data symbol) baud having known symmetry properties. Because all three synchronization tasks may be accomplished utilizing a single sync baud, the present invention is spectrally efficient. A differential correlation metric is utilized to efficiently provide integer subcarrier frequency synchronization and per-subcarrier rotation synchronization.

US Patent:

6999467, Feb 14, 2006

Filed:

Jul 28, 2003

Appl. No.:

10/628680

Inventors:

Thomas P. Krauss - Algonquin IL, US
Kevin L. Baum - Rolling Meadows IL, US
Vijay Nangia - Bombay, IN

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7/216
H04J 11/00

US Classification:

370441, 370208, 370342

Abstract:

A staggered spread OFCDM scheme is utilized that improves channel estimation. In a first embodiment, each chip stream is time shifted by a predetermined amount and then transmitted on a predetermined subcarrier. This results in time-spread symbols being staggered (time-offset) on different subcarriers allowing for more frequent sampling of the channel. In a second embodiment a staggered spreading approach is applied in the frequency dimension to improve the performance of a system with spreading in the frequency dimension.

US Patent:

7016319, Mar 21, 2006

Filed:

Mar 24, 2003

Appl. No.:

10/395782

Inventors:

Kevin L. Baum - Rolling Meadows IL, US
Brian K. Classon - Palatine IL, US
Mark C. Cudak - McHenry IL, US
Vijay Nangia - Schaumburg IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/36

US Classification:

370329, 370341, 370436, 455446

Abstract:

A downlink frame () is divided in to similar sized resource blocks () with each co-channel sector scheduled to transmit from the beginning of its respective assigned resource block. Transmissions to remote units within the particular sector will occur only within the particular resource block, up to a point where all N resource units have been utilized. Beyond that point, additional transmissions are scheduled to be transmitted at the end of the resource blocks assigned to the other sectors.