Richard A Kobylinski

6694138, Feb 17, 2004

Mar 27, 2000

09/534735

Richard A. Kobylinski - Austin TX
Milap V. Majmundar - Austin TX

SBC Technology Resources, Inc. - Austin TX

H04Q 720

455437, 455436, 455502, 370331

A system and method for improved mobile assisted handoff in a digital cellular communication system that gives the mobile station the ability to synchronize to candidate base station transmissions in order to read the transmitted digital voice color code (DVCC) of the candidate station. This process is performed during the idle period between two designated time slots in a TDMA frame. The invention is an enhancement to the existing mobile assisted handoff procedures described in the existing IS-136 standard. The present invention improves on the IS-136 standards use of received signal strength measurements in that it allows the mobile station to acquire and report information regarding the digital verification color code (DVCC) of the candidate base station channels. Since the DVCC uniquely identifies the cell site to which a channel belongs, it is used to distinguish the candidate base station channel from its co-channel interferers, allowing the network to make a more informed handoff decision.

6714607, Mar 30, 2004

Dec 20, 2001

10/037300

Richard A. Kobylinski - Austin TX
David Randall Wolter - Austin TX

SBC Technology Resources, Inc. - Austin TX

H03D 100

375341

A desired signal and at least one interfering signal are joint demodulated with a Viterbi equalizer having an adaptive total number of states. The total number of states is based on channel impulse response (CIR) coefficients associated with the desired signal and the at least one interfering signal.

7043243, May 9, 2006

Sep 5, 2003

10/655906

Richard A. Kobylinski - Austin TX, US
Milap V. Majmundar - Austin TX, US

SBC Technology Resources, Inc. - Austin TX

H04Q 7/20

455437, 455436, 455438, 455502, 455424

A system and method for improved mobile assisted handoff in a digital cellular communication system that gives the mobile station the ability to synchronize to candidate base station transmissions in order to read the transmitted digital voice color code (DVCC) of the candidate station. This process-is performed during the idle period between two designated time slots in a TDMA frame. The invention is an enhancement to the existing mobile assisted handoff procedures described in the existing IS-136 standard. The present invention improves on the IS-136 standard's use of received signal strength measurements in that it allows the mobile station to acquire and report information regarding the digital verification color code (DVCC) of the candidate base station channels. Since the DVCC uniquely identifies the cell site to which a channel belongs, it is used to distinguish the candidate base station channel from its co-channel interferers, allowing the network to make a more informed handoff decision.

7242938, Jul 10, 2007

Jan 19, 2006

11/336663

Richard A. Kobylinski - Austin TX, US
Milap V. Majmundar - Austin TX, US

SBC Technology Resources, Inc. - Austin TX

H04G 7/20

455437, 455436, 455439, 455502

A system and method for improved mobile assisted handoff in a digital cellular communication system that gives the mobile station the ability to synchronize to candidate base station transmissions in order to read the transmitted digital voice color code (DVCC) of the candidate station. This process is performed during the idle period between two designated time slots in a TDMA frame. The invention is an enhancement to the existing mobile assisted handoff procedures described in the existing IS-136 standard. The present invention improves on the IS-136 standard's use of received signal strength measurements in that it allows the mobile station to acquire and report information regarding the digital verification color code (DVCC) of the candidate base station channels. Since the DVCC uniquely identifies the cell site to which a channel belongs, it is used to distinguish the candidate base station channel from its co-channel interferers, allowing the network to make a more informed handoff decision.

7346130, Mar 18, 2008

Dec 15, 2003

10/737175

Richard A. Kobylinski - Austin TX, US
David Randall Wolter - Austin TX, US

SBC Technology Resources, Inc. - Austin TX

H04D 1/00
H04L 27/06

375341

A desired signal and at least one interfering signal are joint demodulated with a Viterbi equalizer having an adaptive total number of states. The total number of states is based on channel impulse response (CIR) coefficients associated with the desired signal and the at least one interfering signal.

7450668, Nov 11, 2008

Feb 2, 2005

11/049370

Arunabha Ghosh - Austin TX, US
Richard A. Kobylinski - Austin TX, US

AT&T Intellectual Property I, L.P. - Reno NV

H04L 27/06
H03M 13/03

375341, 714795

First and second partially collapsed metric values are determined for each bit in a symbol transition. Each first partially collapsed metric value is a cumulative metric of starting in a first state and ending in a second state in L transitions with the respective bit in the symbol transition being a first value. Each second partially collapsed metric value is a cumulative metric of starting in the first state and ending in the second state in L transitions with the respective bit in the symbol transition being a second value, the second value differing from the first value. For each bit in the symbol transition, a relative likelihood value is determined based on its respective first and second partially collapsed metric values. A symbol is decoded based on a hard decision performed using the relative likelihood value for each bit in the symbol transition.

7450924, Nov 11, 2008

Mar 24, 2005

11/088368

Ayman Mostafa - Alpharetta GA, US
Richard A. Kobylinski - Austin TX, US

AT&T Mobility II LLC - Atlanta GA
SBC Knowledge Ventures, L.P. - Reno NV

H04B 1/10

455306, 455302, 455303, 455304, 375348, 375232, 375350

A combined SAIC receiver and a multiple-antenna, receive diversity receiver are employed to reduce interference in a wireless system. The real and imaginary parts of the de-rotated signal for each receive path associated with an antenna are separately filtered and a combined output signal of all receive paths is generated. The weighting coefficients are adjusted based on an error signal produced by comparing the combined output signal with a reference signal. The weighting coefficients are initially set based on an MMSE/LS type of signal processing criteria, where the reference signal is the Training Sequence Code (TSC). Subsequent adjustment/tracking can be accomplished by using known tracking algorithms, e. g. LMS or RLS, or the coefficients can be re-computed using MMSE/LS processing. The reference signal for tracking may be a combination of the TSC and estimated data symbols provided by an equalizer.

7515660, Apr 7, 2009

Jan 15, 2008

12/014348

Richard A. Kobylinski - Austin TX, US
David Randall Wolter - Austin TX, US

SBC Technology Resources, Inc. - Austin TX

H03D 1/00
H03M 13/03

375341, 714795

Systems and methods for performing joint demodulation using a Viterbi equalizer having an adaptive total number of states are disclosed. Generally, a method includes joint demodulating a desired signal and none or more interfering signals with a Viterbi equalizer having an adaptive total number of states based on channel impulse response (CIR) coefficients associated with a desired signal ant the one or more interfering signals.