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Stephen L Biracree

from Rochester, NY
Age ~62
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Also known as:
Stephen Leonard Biracree, Steve Biracree
Phone and address:
41 Long Pond Rd, Rochester, NY 14612
(585) 328-9105
Related to:
Allen R Rivers, 60Joseph F Accorso, 67
Connected to:
Umesh S Biradar, 50Vijay S Biradar, 43John Biraghi, 49William Biraghi, 42Rebecca N Biram, 38Barbara J Biran, 69Dan Biran, 68Zsuzsanna Biran, 71Estelle R Birardi, 92Laurence J Birardi, 64

Stephen Biracree Phones & Addresses

  • 41 Long Pond Rd, Rochester, NY 14612 (585) 328-9105
  • Greece, NY
  • 2155 Grakelow Dr, Jamison, PA 18929 (215) 491-5134
  • 6065 Park Ave, Indianapolis, IN 46220 (317) 254-8469
  • Spencerport, NY
  • Carmel, IN
  • Clearwater, FL
  • 41 Long Pond Rd, Rochester, NY 14612 (215) 491-5134

Work

Company: Iberium communications Feb 2006 Position: Executive vice president

Education

Degree: MSEE School / High School: Purdue University 1997 to 1999 Specialities: Electrical Engineering

Skills

Signal Processing • Product Development • Digital Signal Processors • Start Ups • Systems Engineering • Consumer Electronics • System Architecture • Embedded Systems • Semiconductors • Software Development • Software Design

Industries

Semiconductors

Resumes

Resumes

Stephen Biracree Photo 1

Executive Vice President

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Location:
Pasadena, CA
Industry:
Semiconductors
Work:
Iberium Communications since Feb 2006
Executive Vice President
RDA, Inc Mar 2004 - Feb 2006
Senior Staff Engineer
NxtWave Communications/ATI Jul 1999 - Jan 2004
Principal Engineer
Naval Air Warfare Center Jul 1984 - Aug 1997
Sr. Engineer
Education:
Purdue University 1997 - 1999
MSEE, Electrical Engineering University of Notre Dame 1980 - 1984
BSEE, Electrical Engineering
Skills:
Signal Processing
Product Development
Digital Signal Processors
Start Ups
Systems Engineering
Consumer Electronics
System Architecture
Embedded Systems
Semiconductors
Software Development
Software Design

Publications

Us Patents

Blind Cost Criterion Timing Recovery

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US Patent:
6985549, Jan 10, 2006
Filed:
Jan 17, 2001
Appl. No.:
09/761303
Inventors:
Stephen L. Biracree - Jamison PA, US
Azzedine Touzni - Doylestown PA, US
Thomas J. Endres - Ottsville PA, US
Christopher H. Strolle - Fort Washington PA, US
Samir N. Hulyalkar - Newtown PA, US
Raúl A. Casas - Doylestown PA, US
Assignee:
ATI Research, Inc. - Santa Clara CA
International Classification:
H04L 7/00
US Classification:
375355
Abstract:
Symbol timing recovery employs a blind cost criterion from the Bussgang class of functions, and its stochastic gradient, to generate a timing phase error used to adjust sampling of received symbols. For one implementation, the estimate is derived in accordance with the Constant Modulus (CM) criterion and its gradient via the CM algorithm (CMA), and the estimate is calculated from a sequence of samples. This estimate is then used to adjust the period and phase of the sample sequence toward the period and phase of the transmitted symbols, driving the timing phase error to zero. The values used may be either i) samples themselves, ii) processed (e. g. , interpolated) samples, or iii) equalized and processed samples. In addition, timing phase error estimates for other cost criteria, including the least mean squares algorithm, may be generated. These timing phase error estimates are selected either alone or in combination for deriving the timing phase error used to adjust the period and phase of the sample sequence.

Linear Prediction Based Initialization Of A Single-Axis Blind Equalizer For Vsb Signals

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US Patent:
7027500, Apr 11, 2006
Filed:
Dec 11, 2001
Appl. No.:
10/016665
Inventors:
Raúl A. Casas - Doylestown PA, US
Thomas J. Endres - Kent WA, US
Stephen L. Biracree - Jamison PA, US
Christopher H. Strolle - Fort Washington PA, US
Samir N. Hulyalkar - Newtown PA, US
Assignee:
ATI Research, Inc. - Santa Clara CA
International Classification:
H03K 5/159
US Classification:
375232, 708323, 348607
Abstract:
A single-axis receiver processing, for example, complex vestigial sideband modulated signals with an equalizer with forward and feedback filters. Forward and feedback filters have parameters that are initialized and adapted to steady state operation. Adaptive equalization employs linear predictive filtering and error term generation based on various cost criteria. Adaptive equalization includes recursive update of parameters for forward and feedback filtering as operation changes between linear and decision-feedback equalization of either single or multi-channel signals. An adaptive, linear predictive filter generates real-valued parameters that are employed to set the parameters of the feedback filter. In an initialization mode, filter parameters are set via a linear prediction filter to approximate the inverse of the channel's impulse/frequency response and a constant modulus error term for adaptation of the filter parameters. In an acquisition mode, equalization is as linear equalization with a constant modulus error term, and possibly other error terms in combination, for adaptation of the filter parameters.

Carrier Phase Estimation Based On Single-Axis Constant Modulus Cost Criterion And Bussgang Criteria

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US Patent:
7031405, Apr 18, 2006
Filed:
Aug 3, 2001
Appl. No.:
09/922006
Inventors:
Azzedine Touzni - Doylestown PA, US
Raúl A. Casas - Doylestown PA, US
Thomas J. Endres - Kent WA, US
Stephen L. Biracree - Jamison PA, US
Christopher H. Strolle - Fort Washington PA, US
Samir N. Hulyalkar - Newtown PA, US
Assignee:
ATI Research, Inc. - Santa Clara CA
International Classification:
H04L 27/14
US Classification:
375326, 375233, 375324, 375340, 375350
Abstract:
Carrier phase recovery employs a single-axis blind cost criterion from the Bussgang class of functions, and its stochastic gradient, to generate a carrier phase error used to adjust a received and demodulated signal to near baseband. For one implementation, the estimate is derived in accordance with a Single-Axis Constant Modulus (SA-CM) criterion and its stochastic gradient via a SA-CM algorithm (SA-CMA). The carrier phase error is then used to adjust the carrier frequency and phase of the received and demodulated signal toward the frequency and phase of the carrier used to modulate the transmitted symbols, driving the carrier phase error to zero. The values used for the phase recovery may be either i) an IIR filtered signal, ii) a processed signal (e. g. , decisions for the signal symbols), or iii) an equalized and processed signal.

Rapid Channel Signal Identification

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US Patent:
7573531, Aug 11, 2009
Filed:
Oct 14, 2005
Appl. No.:
11/251080
Inventors:
Rajan Aggarwal - Bristol PA, US
Mark Hryszko - Doylestown PA, US
Samuel H. Reichgott - Coopersburg PA, US
Punyabrata Ray - Langhorne PA, US
Stephen L. Biracree - Jamison PA, US
Binning Chen - Newtown PA, US
Raul A. Casas - Doylestown PA, US
Assignee:
ATI Technologies, Inc. - Markham, Ontario
International Classification:
H04N 5/44
H04N 5/50
US Classification:
348553, 348725, 348731
Abstract:
An apparatus, for use in a receiver configured to receive electronic signals, for identifying digital signals that are available for reception, includes a timing recovery device configured to receive an incoming signal, related to a transmitted signal, the incoming signal having a first symbol rate, and to re-sample the incoming signal to provide a second symbol rate, and an analyzer that is in communication with the timing recovery device and that is configured to make a determination as to whether a difference between the second symbol rate and a third symbol rate of a transmitter providing the transmitted signal is within an acceptable tolerance and to use the determination in an analysis of whether the transmitted signal is available for reception.

Rapid Channel Signal Identification

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US Patent:
7733422, Jun 8, 2010
Filed:
Aug 10, 2009
Appl. No.:
12/538651
Inventors:
Rajan Aggarwal - Bristol PA, US
Mark Hryszko - Doylestown PA, US
Samuel H. Reichgott - Coopersburg PA, US
Punyabrata Ray - Langhorne PA, US
Stephen L. Biracree - Jamison PA, US
Binning Chen - Doylestown PA, US
Raul A. Casas - Doylestown PA, US
Assignee:
ATI Technologies, Inc. - Markham, Ontario
International Classification:
H04N 5/44
H04N 5/50
US Classification:
348553, 348725, 348731
Abstract:
An apparatus, for use in a receiver configured to receive electronic signals, for identifying digital signals that are available for reception, includes a timing recovery device configured to receive an incoming signal, related to a transmitted signal, the incoming signal having a first symbol rate, and to re-sample the incoming signal to provide a second symbol rate, and an analyzer that is in communication with the timing recovery device and that is configured to make a determination as to whether a difference between the second symbol rate and a third symbol rate of a transmitter providing the transmitted signal is within an acceptable tolerance and to use the determination in an analysis of whether the transmitted signal is available for reception.

Method And Apparatus For Joint Decoding And Equalization

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US Patent:
8170128, May 1, 2012
Filed:
Aug 26, 2008
Appl. No.:
12/229725
Inventors:
Raul Alejandro Casas - Doylestown PA, US
Stephen Leonard Biracree - Rochester NY, US
Slobodan Simovich - San Francisco CA, US
Thomas Joseph Endres - Seattle WA, US
Assignee:
Iberium Communications, Inc. - San Francisco CA
International Classification:
H04L 5/12
H04L 23/02
US Classification:
375265, 375346
Abstract:
The present invention is related to joint trellis decoding and equalization using a decision feedback equalizer.

Simplified Data Interface Protocol For Digital Television Receiver

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US Patent:
8643775, Feb 4, 2014
Filed:
Apr 14, 2011
Appl. No.:
13/087307
Inventors:
Anand Mahendra Shah - San Francisco CA, US
Stephen Biracree - Rochester NY, US
Raúl Alejandro Casas - Doylestown PA, US
Slobodan Simovich - San Francisco CA, US
Thomas Joseph Endres - Seattle WA, US
Assignee:
Iberium Communications Inc. - San Francisco CA
International Classification:
H04N 5/44
H04N 5/455
US Classification:
3484231, 348725, 348726, 348720, 3484261
Abstract:
Certain embodiments of the present invention encapsulate a variety of data, for example, FIC data, together with ATSC-M/H Service data, into a single IP stream, to simplify the interface between demodulator and media processor. A single data interface protocol within the receiver can then be used, facilitating integration.

Efficient Adaptive Equalizer Implementation

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US Patent:
20090067483, Mar 12, 2009
Filed:
Aug 26, 2008
Appl. No.:
12/229726
Inventors:
Raul Casas - Doylestown PA, US
Stephen Leonard Biracree - Rochester NY, US
Slobodan Simovich - San Francisco CA, US
Thomas Joseph Endres - Seattle WA, US
International Classification:
H03K 5/159
US Classification:
375232
Abstract:
The present invention is related to the digital implementation of adaptive equalizers for high-speed communication systems, using finite precision arithmetic, for example, as implemented in a silicon ASIC.
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Stephen L Biracree from Rochester, NY, age ~62 Get Report