Thomas E Kovarik

US Patent:

7646704, Jan 12, 2010

Filed:

Oct 31, 2006

Appl. No.:

11/554788

Inventors:

Xiaoyong Yu - Grayslake IL, US
Thomas J. Kovarik - Grayslake IL, US
Alan P. Rottinghaus - Barrington IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04J 11/00

US Classification:

370208

Abstract:

A communication device is provided that is capable of operating in an OFDM or communication system and that provides for cancellation of in-band spurs. The communication device identifies a bin of multiple bins associated with an output of an inverse transformer and comprising a spur and estimates one or more spur phase parameters and a spur amplitude in association with the identified bin. In one embodiment of the present invention, the one or more spur phase parameters includes a spur initial phase and a spur change rate. When the communication device receives a signal from another communication device, the communication device transforms the received signal to produce a multiple parallel output signals that are each associated with a bin of the multiple bins and cancels a spur in an output signal associated with the identified bin based on the estimated one or more spur phase parameters and spur amplitude.

US Patent:

8285221, Oct 9, 2012

Filed:

Aug 31, 2009

Appl. No.:

12/550432

Inventors:

Thomas J. Kundmann - Cary IL, US
Gregory T. Nash - Arlington Heights IL, US
Aaron W. Netsell - Woodstock IL, US
Thomas J. Kovarik - Grayslake IL, US

Assignee:

Motorola Mobility LLC - Libertyville IL

International Classification:

H04W 24/00

US Classification:

455 6714, 4555621

Abstract:

A method, a system and a device for implementing a scalable, self-calibrating and configuring, radio frequency head in a wireless base station that performs phase calibration for coherent combining of a pair of transmitter outputs. Configurable Antenna Calibration (CAC) logic initiates phase calibration for coherent combining by selecting a first configuration and triggering the transmission of a reference signal by radio frequency (RF) transmitters using different sub-carriers. The CAC logic generates a vector of phase values by comparing the reference signal with the respective signals received by a calibration receiver. The CAC logic also generates calibration coefficients for coherent combining by normalizing the phase values. In addition, a passive combiner mechanism is employed to implement coherent combining. The CAC logic performs calibration of smart antennas by providing calibration coefficients via a second configuration which utilizes both a calibration transmitter and the calibration receiver.

US Patent:

20080080406, Apr 3, 2008

Filed:

Sep 29, 2006

Appl. No.:

11/536813

Inventors:

Neil R. Peplinski - N. Barrington IL, US
William K. Doss - Lake in the Hills IL, US
Thomas J. Kovarik - Grayslake IL, US
Thomas J. Kundmann - Cary IL, US
Alan P. Rottinghaus - Barrington IL, US

Assignee:

MOTOROLA, INC. - Schaumburg IL

International Classification:

H04L 5/14
H04B 7/204
H04Q 7/00

US Classification:

370294, 370295, 370319, 370328

Abstract:

An access point () in a dual-frequency TDD communication system () includes a transceiver () that transmits information to a first group of subscriber devices (-) at a first frequency (f) and contemporaneously receives information from a second group of a subscriber devices (-) at a second frequency (f) during at least a portion of a period of time (T). The access point () also transmits information to the second group of subscriber devices (-) at the second frequency (f) and contemporaneously receives information from the first group of subscriber devices (-) at the first frequency (f) during at least a portion of a second period of time (T). A method for performing a dual-frequency communication scheme is also provided.

US Patent:

56847955, Nov 4, 1997

Filed:

Jan 30, 1996

Appl. No.:

8/594098

Inventors:

Christopher John Daniel - Lake Zurich IL
Thomas J. Kovarik - Grayslake IL
Robert Scott Swenson - Hoffman Estates IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04J 306

US Classification:

370347

Abstract:

In a Time Division Multiple Access System, multiple offset values are provided to a divider control circuit (213) of a fractional-N synthesizer (200) by utilizing a microprocessor (305). The microprocessor (305) utilizes timeslot information provided to it by a timeslot selector (301), frequency information provided to it by a frequency selector (303) and a read-only memory (307), to provide offset values to the divider control circuit (213).

US Patent:

20150201368, Jul 16, 2015

Filed:

Jul 4, 2013

Appl. No.:

14/413776

Inventors:

- Espoo, FI
Amitabha Ghosh - Buffalo Grove IL, US
Thomas Kovarik - Grayslake IL, US
Rapeepat Ratasuk - Hoffman Estates IL, US
Alan Rottinghaus - Barrington IL, US
Timothy Thomas - Palatine IL, US
Frederick Vook - Schaumburg IL, US

International Classification:

H04W 48/08
H04W 72/04

Abstract:

The exemplary embodiments of the invention provide at least a method and an apparatus to determine a beacon signal for a network node, where the network node is configured to connect with a cluster of access points in a wireless communication network, and where the beacon signal identifies the cluster; and send the beacon signal towards the wireless communication network. Further, the exemplary embodiments of the invention provide at least a method and an apparatus to determine a dominant access point of a cluster of access points based on signaling from at least one access point associated with the cluster of access points; and in response to the determining, direct communications towards the dominant access point of the cluster of access points.

US Patent:

20150103937, Apr 16, 2015

Filed:

Oct 15, 2013

Appl. No.:

14/054065

Inventors:

- Espoo, FI
Timothy THOMAS - Palatine IL, US
Thomas KOVARIK - Grayslake IL, US

International Classification:

H04B 7/04
H04B 1/14
H04L 25/06
H04B 7/08
H04B 7/06

US Classification:

375267, 375295, 375344

Abstract:

Systems, methods, apparatuses, and computer program products for an interleaved multi-beam acquisition waveform providing concurrent beam selection, automatic gain control (AGC) and automatic frequency correction (AFC) are provided. The access point (AP) may send an acquisition waveform on multiple beams, then return and retransmit an AFC on the multiple beams thus interleaving beam switching with the acquisition and frequency correction waveforms. AGC correction can be deferred until the end, relying on the fact that the transmitter may be detected at close range using a one of the multi-beams that is attenuated.

US Patent:

20140313081, Oct 23, 2014

Filed:

Apr 17, 2013

Appl. No.:

13/864567

Inventors:

Nokia Siemens Networks Oy - , US
Thomas Kovarik - Grayslake IL, US
Rapeepat Ratasuk - Hoffman Estates IL, US

Assignee:

Nokia Siemens Networks Oy - Espoo

International Classification:

H01Q 3/00

US Classification:

342377, 342368

Abstract:

A method for selectively performing beam formation using a RF chip-based antenna array is described. The method includes determining whether to use a plurality of antenna arrays in one or more common carrier substrates in either a single group or a plurality of groups. The method also includes, in response to determining to use the plurality of antenna arrays in a single group, providing a single coupling factor to all antenna arrays in the plurality of antenna arrays and, in response to determining to use the plurality of antenna arrays in a plurality of groups, providing, for each group in the plurality of groups, a group-specific coupling factor to each antenna array in the group. Apparatus and computer readable media are also described.

Author:

Thomas J. Kovarik

ISBN #:

0891960325

Author:

Thomas J. Kovarik

ISBN #:

0891960341