Patents by Inventor Edward Gebara
Edward Gebara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8576939Abstract: A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication signal to a plurality of references such that multiple comparisons proceed essentially in parallel. A summation node can add the results of the comparisons to provide an output signal set to one of the discrete levels. The slicer can process the communication signal and provide the output signal on a symbol-by-symbol basis. A decision feedback equalizer (“DFE”) can comprise the slicer. A feedback circuit of the DFE can delay and scale the output signal and apply the delayed and scaled signal to the communication signal to reduce intersymbol interference (“ISI”).Type: GrantFiled: October 14, 2009Date of Patent: November 5, 2013Assignee: Quellan, Inc.Inventors: Andrew Joo Kim, Cattalen Pelard, Edward Gebara
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Patent number: 8503940Abstract: A method for interference suppression, including receiving a sample of an aggressor communication signal from a sensor embedded in a flex circuit, emulating interference that the aggressor communication signal imposes on a victim communication signal, and suppressing the imposed interference in response to applying the emulated interference to the victim communication signal. In other aspects, the flex circuit comprises a plurality of traces running substantially parallel to one another along a surface of the flex circuit, and the sensor comprises one of the plurality of traces and one of a plurality of traces of another flex circuit. In still other aspects, the flex circuit comprises a plurality of traces running substantially parallel to one another and the sensor comprises a trace of the flex circuit running perpendicular to the plurality of traces running substantially parallel to one another.Type: GrantFiled: February 15, 2012Date of Patent: August 6, 2013Assignee: Quellan, Inc.Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Publication number: 20120149306Abstract: A method for interference suppression, including receiving a sample of an aggressor communication signal from a sensor embedded in a flex circuit, emulating interference that the aggressor communication signal imposes on a victim communication signal, and suppressing the imposed interference in response to applying the emulated interference to the victim communication signal. In other aspects, the flex circuit comprises a plurality of traces running substantially parallel to one another along a surface of the flex circuit, and the sensor comprises one of the plurality of traces and one of a plurality of traces of another flex circuit. In still other aspects, the flex circuit comprises a plurality of traces running substantially parallel to one another and the sensor comprises a trace of the flex circuit running perpendicular to the plurality of traces running substantially parallel to one another.Type: ApplicationFiled: February 15, 2012Publication date: June 14, 2012Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Patent number: 8135350Abstract: A system for suppressing interference imposed on a victim communication signal by an aggressor communication signal including a circuit that comprises an input port, an output port, and a signal processing circuit connected between the input port and the output port, the signal processing circuit being operative to produce an interference compensation signal at the output port, for application to the victim communication signal, via processing a sample of the aggressor communication signal transmitted through the input port, and the input port being configured to connect to a sampling system that includes a first circuit trace running along a surface of a flex circuit of a portable wireless device that is dedicated to sensing the aggressor communication signal flowing on a second circuit trace running along the surface of the flex circuit.Type: GrantFiled: July 26, 2011Date of Patent: March 13, 2012Assignee: Quellan, Inc.Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Publication number: 20110281524Abstract: A system for suppressing interference imposed on a victim communication signal by an aggressor communication signal including a circuit that comprises an input port, an output port, and a signal processing circuit connected between the input port and the output port, the signal processing circuit being operative to produce an interference compensation signal at the output port, for application to the victim communication signal, via processing a sample of the aggressor communication signal transmitted through the input port, and the input port being configured to connect to a sampling system that includes a first circuit trace running along a surface of a flex circuit of a portable wireless device that is dedicated to sensing the aggressor communication signal flowing on a second circuit trace running along the surface of the flex circuit.Type: ApplicationFiled: July 26, 2011Publication date: November 17, 2011Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Patent number: 8005430Abstract: Signals propagating on an aggressor communication channel can cause interference in a victim communication channel. A sensor coupled to the aggressor channel can obtain a sample of the aggressor signal. The sensor can be integrated with or embedded in a system, such as a flex circuit or a circuit board, that comprises the aggressor channel. The sensor can comprise a dedicated conductor or circuit trace that is near an aggressor conductor, a victim conductor, or an EM field associated with the interference. An interference compensation circuit can receive the sample from the sensor. The interference compensation circuit can have at least two operational modes of operation. In the first mode, the circuit can actively generate or output a compensation signal that cancels, corrects, or suppresses the interference. The second mode can be a standby, idle, power-saving, passive, or sleep mode.Type: GrantFiled: March 2, 2009Date of Patent: August 23, 2011Assignee: Quellan Inc.Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Publication number: 20100197233Abstract: Signals propagating on an aggressor communication channel can cause detrimental interference in a victim communication channel. A signal processing circuit can generate an interference cancellation signal that, when applied to the victim communication channel, cancels the detrimental interference. The signal processing circuit can dynamically adjust or update two or more aspects of the interference cancellation signal, such as an amplitude or gain parameter and a phase or delay parameter. Via the dynamic adjustments, the signal processing circuit can adapt to changing conditions, thereby maintaining an acceptable level of interference cancellation in a fluctuating operating environment. A control circuit that implements the parametric adjustments can have at least two modes of operation, one for adjusting the amplitude parameter and one for adjusting the phase parameter. The modes can be selectable or can be intermittently available, for example.Type: ApplicationFiled: April 9, 2010Publication date: August 5, 2010Inventors: Andrew Joo Kim, Edward Gebara, Bruce C. Schmukler, Mark W. Dickmann, Michael F. Farrell, Michael G. Vrazel, David Anthony Stelliga, Joy Laskar, Charles E. Summers
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Patent number: 7729431Abstract: A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating an estimate of the interference signal and subtracting the estimate from the interference signal. The cancellation device can generate the estimate based on sampling signals on an antenna that generates the interference or on an antenna that receives the interference. The cancellation device can comprise a model of the crosstalk effect. Transmitting test signals on the communication system can define or refine the model.Type: GrantFiled: February 8, 2008Date of Patent: June 1, 2010Assignee: Quellan, Inc.Inventors: Edward Gebara, Joy Laskar, Emmanouil M. Tentzeris, Andrew Joo Kim
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Patent number: 7725079Abstract: Signals propagating on an aggressor communication channel can cause detrimental interference in a victim communication channel. A signal processing circuit can generate an interference cancellation signal that, when applied to the victim communication channel, cancels the detrimental interference. The signal processing circuit can dynamically adjust or update two or more aspects of the interference cancellation signal, such as an amplitude or gain parameter and a phase or delay parameter. Via the dynamic adjustments, the signal processing circuit can adapt to changing conditions, thereby maintaining an acceptable level of interference cancellation in a fluctuating operating environment. A control circuit that implements the parametric adjustments can have at least two modes of operation, one for adjusting the amplitude parameter and one for adjusting the phase parameter. The modes can be selectable or can be intermittently available, for example.Type: GrantFiled: June 9, 2006Date of Patent: May 25, 2010Assignee: Quellan, Inc.Inventors: Andrew Joo Kim, Edward Gebara, Bruce C. Schmukler, Mark W. Dickmann, Michael F. Farrell, Michael G. Vrazel, David Anthony Stelliga, Joy Laskar, Charles E. Summers
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Publication number: 20100027709Abstract: A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication signal to a plurality of references such that multiple comparisons proceed essentially in parallel. A summation node can add the results of the comparisons to provide an output signal set to one of the discrete levels. The slicer can process the communication signal and provide the output signal on a symbol-by-symbol basis. A decision feedback equalizer (“DFE”) can comprise the slicer. A feedback circuit of the DFE can delay and scale the output signal and apply the delayed and scaled signal to the communication signal to reduce intersymbol interference (“ISI”).Type: ApplicationFiled: October 14, 2009Publication date: February 4, 2010Applicant: Quellan, Inc.Inventors: Andrew Joo Kim, Cattalen Pelard, Edward Gebara
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Patent number: 7616700Abstract: A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication signal to a plurality of references such that multiple comparisons proceed essentially in parallel. A summation node can add the results of the comparisons to provide an output signal set to one of the discrete levels. The slicer can process the communication signal and provide the output signal on a symbol-by-symbol basis. A decision feedback equalizer (“DFE”) can comprise the slicer. A feedback circuit of the DFE can delay and scale the output signal and apply the delayed and scaled signal to the communication signal to reduce intersymbol interference (“ISI”).Type: GrantFiled: December 22, 2004Date of Patent: November 10, 2009Assignee: Quellan, Inc.Inventors: Andrew Joo Kim, Cattalen Pelard, Edward Gebara
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Publication number: 20090170438Abstract: Signals propagating on an aggressor communication channel can cause interference in a victim communication channel. A sensor coupled to the aggressor channel can obtain a sample of the aggressor signal. The sensor can be integrated with or embedded in a system, such as a flex circuit or a circuit board, that comprises the aggressor channel. The sensor can comprise a dedicated conductor or circuit trace that is near an aggressor conductor, a victim conductor, or an EM field associated with the interference. An interference compensation circuit can receive the sample from the sensor. The interference compensation circuit can have at least two operational modes of operation. In the first mode, the circuit can actively generate or output a compensation signal that cancels, corrects, or suppresses the interference. The second mode can be a standby, idle, power-saving, passive, or sleep mode.Type: ApplicationFiled: March 2, 2009Publication date: July 2, 2009Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Patent number: 7522883Abstract: Signals propagating on an aggressor communication channel can cause interference in a victim communication channel. A sensor coupled to the aggressor channel can obtain a sample of the aggressor signal. The sensor can be integrated with or embedded in a system, such as a flex circuit or a circuit board, that comprises the aggressor channel. The sensor can comprise a dedicated conductor or circuit trace that is near an aggressor conductor, a victim conductor, or an EM field associated with the interference. An interference compensation circuit can receive the sample from the sensor. The interference compensation circuit can have at least two operational modes of operation. In the first mode, the circuit can actively generate or output a compensation signal that cancels, corrects, or suppresses the interference. The second mode can be a standby, idle, power-saving, passive, or sleep mode.Type: GrantFiled: December 14, 2005Date of Patent: April 21, 2009Assignee: Quellan, Inc.Inventors: Edward Gebara, Andrew Joo Kim, Joy Laskar, Anthony Stelliga, Emmanouil M. Tentzeris
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Publication number: 20080146183Abstract: A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating an estimate of the interference signal and subtracting the estimate from the interference signal. The cancellation device can generate the estimate based on sampling signals on an antenna that generates the interference or on an antenna that receives the interference. The cancellation device can comprise a model of the crosstalk effect. Transmitting test signals on the communication system can define or refine the model.Type: ApplicationFiled: February 8, 2008Publication date: June 19, 2008Applicant: Quellan, Inc.Inventors: Edward Gebara, Joy Laskar, Emmanouil M. Tentzeris, Andrew Joo Kim
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Patent number: 7366244Abstract: A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating an estimate of the interference signal and subtracting the estimate from the interference signal. The cancellation device can generate the estimate based on sampling signals on an antenna that generates the interference or on an antenna that receives the interference. The cancellation device can comprise a model of the crosstalk effect. Transmitting test signals on the communication system can define or refine the model.Type: GrantFiled: August 30, 2006Date of Patent: April 29, 2008Assignee: Quellan, Inc.Inventors: Edward Gebara, Joy Laskar, Emmanouil M. Tentzeris, Andrew Joo Kim
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Patent number: 7307569Abstract: Data throughput rates are increased in an optical fiber communication system without requiring replacement of the existing optical fiber in a link. Channel throughput is increased by upgrading the components and circuitry in the head and terminal of an optical fiber communication system link. Aggregate throughput in a fiber optic link is increased beyond the range of conventional Wavelength Division Multiplexed (WDM) upgrades, while precluding the necessity of replacing existing fiber plants. The increase in system throughput is achieved by using advanced modulation techniques to encode greater amounts of data into the transmitted spectrum of a channel, thereby increasing the spectral efficiency of each channel. This novel method of increasing transmission capacity by upgrading the head and terminal of the system to achieve greater spectral efficiency and hence throughput, alleviates the need to replace existing fiber plants.Type: GrantFiled: November 15, 2006Date of Patent: December 11, 2007Assignee: Quellan, Inc.Inventors: Michael G. Vrazel, Stephen E. Ralph, Joy Laskar, Sungyong Jung, Vincent Mark Hietala, Edward Gebara
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Publication number: 20070222654Abstract: Data throughput rates are increased in an optical fiber communication system without requiring replacement of the existing optical fiber in a link. Channel throughput is increased by upgrading the components and circuitry in the head and terminal of an optical fiber communication system link. Aggregate throughput in a fiber optic link is increased beyond the range of conventional Wavelength Division Multiplexed (WDM) upgrades, while precluding the necessity of replacing existing fiber plants. The increase in system throughput is achieved by using advanced modulation techniques to encode greater amounts of data into the transmitted spectrum of a channel, thereby increasing the spectral efficiency of each channel. This novel method of increasing transmission capacity by upgrading the head and terminal of the system to achieve greater spectral efficiency and hence throughput, alleviates the need to replace existing fiber plants.Type: ApplicationFiled: November 15, 2006Publication date: September 27, 2007Applicant: Quellan, Inc.Inventors: Michael Vrazel, Stephen Ralph, Joy Laskar, Sungyong Jung, Vincent Hietala, Edward Gebara
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Publication number: 20070060059Abstract: Signals propagating on an aggressor communication channel can cause detrimental interference in a victim communication channel. A signal processing circuit can generate an interference cancellation signal that, when applied to the victim communication channel, cancels the detrimental interference. The signal processing circuit can dynamically adjust or update two or more aspects of the interference cancellation signal, such as an amplitude or gain parameter and a phase or delay parameter. Via the dynamic adjustments, the signal processing circuit can adapt to changing conditions, thereby maintaining an acceptable level of interference cancellation in a fluctuating operating environment. A control circuit that implements the parametric adjustments can have at least two modes of operation, one for adjusting the amplitude parameter and one for adjusting the phase parameter. The modes can be selectable or can be intermittently available, for example.Type: ApplicationFiled: June 9, 2006Publication date: March 15, 2007Applicant: Quellan, Inc.Inventors: Andrew Kim, Edward Gebara, Bruce Schmukler, Mark Dickmann, Michael Farrell, Michael Vrazel, David Stelliga, Joy Laskar, Charles Summers
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Patent number: 7173551Abstract: Data throughput rates are increased in an optical fiber communication system without requiring replacement of the existing optical fiber in a link. Channel throughput is increased by upgrading the components and circuitry in the head and terminal of an optical fiber communication system link. Aggregate throughput in a fiber optic link is increased beyond the range of conventional Wavelength Division Multiplexed (WDM) upgrades, while precluding the necessity of replacing existing fiber plants. The increase in system throughput is achieved by using advanced modulation techniques to encode greater amounts of data into the transmitted spectrum of a channel, thereby increasing the spectral efficiency of each channel. This novel method of increasing transmission capacity by upgrading the head and terminal of the system to achieve greater spectral efficiency and hence throughput, alleviates the need to replace existing fiber plants.Type: GrantFiled: December 21, 2001Date of Patent: February 6, 2007Assignee: Quellan, Inc.Inventors: Michael G. Vrazel, Stephen E. Ralph, Joy Laskar, Sungyong Jung, Vincent Mark Hietala, Edward Gebara
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Publication number: 20060291598Abstract: A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating an estimate of the interference signal and subtracting the estimate from the interference signal. The cancellation device can generate the estimate based on sampling signals on an antenna that generates the interference or on an antenna that receives the interference. The cancellation device can comprise a model of the crosstalk effect. Transmitting test signals on the communication system can define or refine the model.Type: ApplicationFiled: August 30, 2006Publication date: December 28, 2006Applicant: Quellan, Inc.Inventors: Edward Gebara, Joy Laskar, Emmanouil Tentzeris, Andrew Joo Kim