Patents by Inventor Daniel B Schwartz

Daniel B Schwartz 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).

  • Publication number: 20150171897
    Abstract: In accordance with some embodiments of the present disclosure, a control path for a wireless communication device may include a radio frequency coupler having a coupled port and a terminated port, the radio frequency coupler configured to couple at least a portion of a transmission power of a transmission line coupled to the antenna tuner such that the coupled port carries a first signal indicative of an incident power transmitted to an antenna coupled to the antenna tuner and the terminated port carries a second signal indicative of a reflected power reflected by the antenna. the control path may also include a control module configured to communicate the one or more control signals to the antenna tuner for controlling the impedance of the antenna tuner based at least on the first signal and the second signal.
    Type: Application
    Filed: December 18, 2014
    Publication date: June 18, 2015
    Applicant: INTEL IP CORPORATION
    Inventors: Pravin Premakanthan, Bing Xu, Mark A. Kirschenmann, Amit Bavisi, Daniel B. Schwartz, Mahibur Rahman
  • Patent number: 9055594
    Abstract: A method of generating a transmission signal may include mixing a baseband signal assigned for transmission within a narrow frequency range (“assigned narrow frequency range”) included in a wireless communication channel to produce a shifted signal. The shifted signal may have a shifted frequency that is based on a shift from the assigned narrow frequency range toward a center frequency of the wireless communication channel by a frequency offset. The method may further include shifting a modulation frequency of a modulating signal toward the assigned narrow frequency range frequency range and away from the center frequency by the frequency offset. Additionally, the method may include mixing the shifted signal with the modulating signal to produce a transmission signal having a transmission frequency within the assigned narrow frequency range.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: June 9, 2015
    Assignee: Intel IP Corporation
    Inventors: Claudio Rey, David Harnishfeger, Daniel B. Schwartz
  • Patent number: 8934504
    Abstract: In accordance with some embodiments of the present disclosure, a method may include determining a range of frequencies allocated to resource blocks to be transmitted during a subsequent sub-frame slot or sounding reference symbol sub-slot. The method may also include determining an approximate center frequency of the range of frequencies. The method may additionally include modulating resource blocks of the sub-frame or sounding reference symbol sub-slot at the approximate center frequency. The method may further include transmitting the modulated resource blocks at the approximate center frequency.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: January 13, 2015
    Assignee: Intel IP Corporation
    Inventors: Daniel B. Schwartz, David Harnishfeger, Jeffrey D. Ganger, George B. Norris, Bing Xu, Mark Alan Kirschenmann, Claudio Rey
  • Publication number: 20140364132
    Abstract: A method of generating a transmission signal may include mixing a baseband signal assigned for transmission within a narrow frequency range (“assigned narrow frequency range”) included in a wireless communication channel to produce a shifted signal. The shifted signal may have a shifted frequency that is based on a shift from the assigned narrow frequency range toward a center frequency of the wireless communication channel by a frequency offset. The method may further include shifting a modulation frequency of a modulating signal toward the assigned narrow frequency range frequency range and away from the center frequency by the frequency offset. Additionally, the method may include mixing the shifted signal with the modulating signal to produce a transmission signal having a transmission frequency within the assigned narrow frequency range.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 11, 2014
    Inventors: Claudio REY, David HARNISHFEGER, Daniel B. SCHWARTZ
  • Patent number: 8630679
    Abstract: A wireless communication unit has two or more communication modes including one or more mobile phone mode, in which mobile phone mode the wireless communication unit is able to transmit or receive wireless signals via an antenna from and/or to a mobile phone network in accordance with a communication protocol. The unit includes a baseband module and a radiofrequency module. A radiofrequency interface of the baseband module is connected to the radiofrequency module, for receiving and/or transmitting baseband signals from and/or to the radiofrequency module. The radiofrequency module includes a baseband interface, for receiving and/or transmitting the baseband signals to the baseband module and an antenna interface (AI) connectable to an antenna for receiving and/or transmitting radiofrequency signals from and/or to the antenna. A clock system is connected to the radiofrequency interface and the baseband interface.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: January 14, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Paul Kelleher, Conor Okeeffe, Daniel B Schwartz, Kevin Traylor
  • Patent number: 8379627
    Abstract: A wireless communication device comprises a first sub-system arranged to pass data to a second sub-system comprising timing synchronization logic operably coupled to a counter, such that data is sampled by the timing synchronization logic when passed to the second sub-system from the first sub-system wherein the wireless communication device is characterized in that the timing synchronization logic is arranged to determine a position of a first data frame and in response thereto initiate a counting process of the counter and determine a position of a second data frame and in response thereto determine a count value from the counting process of the counter and in response to the count value determine whether to initiate a timing advance or timing retard operation on the data being passed to the second sub-system. In this manner, the inventive concept provides the wireless communication device with a mechanism to achieve timing synchronization.
    Type: Grant
    Filed: January 2, 2007
    Date of Patent: February 19, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Norman Beamish, Paul Kelleher, Daniel B. Schwartz
  • Publication number: 20130039368
    Abstract: In accordance with some embodiments of the present disclosure, a method may include determining a range of frequencies allocated to resource blocks to be transmitted during a subsequent sub-frame slot or sounding reference symbol sub-slot. The method may also include determining an approximate center frequency of the range of frequencies. The method may additionally include modulating resource blocks of the sub-frame or sounding reference symbol sub-slot at the approximate center frequency. The method may further include transmitting the modulated resource blocks at the approximate center frequency.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Daniel B. Schwartz, David Harnishfeger, Jeffrey D. Ganger, George B. Norris, Bing Xu, Mark Alan Kirschenmann, Claudio Rey
  • Patent number: 8310362
    Abstract: A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: November 13, 2012
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Norman Beamish, Wayne Edwards, Aidan Murphy, Hugh O Brien, Conor O'Keeffe, Patrick Pratt, David Redmond, Daniel B Schwartz, Keith Tilley
  • Patent number: 8284860
    Abstract: Apparatus, systems, and methods are provided for controlling the output of a transmitter using a digital error signal. A method comprises generating a digital reference signal based on a baseband input signal and converting the digital reference signal to an analog reference signal. The method further comprises generating an analog error signal in response to a difference between the analog reference signal and an analog output signal. The method further comprises generating a digital error signal from the analog error signal, and generating an input signal for the transmitter based on the baseband input signal and the digital error signal.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: October 9, 2012
    Assignee: Freescale Semiconductors, Inc.
    Inventors: Bing Xu, Daniel B. Schwartz, Clive K. Tang
  • Patent number: 8170166
    Abstract: Apparatus, systems, and methods are provided for transmitting messages over a serial interface. A method comprises receiving a first signal at a first time and receiving a second signal at a second time, the second time being after the first time. If a difference between the second time and the first time is less than a threshold time period, the method comprises generating a first message that is representative of the first signal and the second signal and transmitting the first message over the serial interface. In accordance with one embodiment, the threshold time period is equal to one half of an interface acquisition delay time period associated with the serial interface.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: May 1, 2012
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Kenneth E. Stebbings, Vivek Bhan, Daniel B. Schwartz
  • Patent number: 8014737
    Abstract: A wireless communication unit comprises a transmitter having an analogue feedback power control loop with an input and a power amplifier having a power amplifier output, where the analogue feedback power control loop is arranged to feedback a signal to the input to set an output power level of the transmitter. The wireless communication unit further comprises an outer digital loop operably coupled from the power amplifier output to the transmitter. In this manner, the inner analogue loop is used to linearise a response obtained from the power amplifier and an outer digital loop wherein the outer digital loop controls the inner analogue loop with regard to saturation detection and correction as well as facilitating multi-mode operation of the wireless communication unit.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: September 6, 2011
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Patrick J. Pratt, Michael A. Milyard, Daniel B. Schwartz, Philip C. Warder
  • Patent number: 8000665
    Abstract: Systems and methods are provided for controlling headroom of an amplifier (e.g., in a transmitter). A method comprises obtaining a target output power for a current interval and obtaining a target headroom for a subsequent interval. The method continues by adjusting, during the current interval, the power output capability of the amplifier based on the target headroom and adjusting the input power of an input signal based on the target output power, such that the output power of the amplifier is substantially constant during the current interval as the power output capability of the amplifier is adjusted.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: August 16, 2011
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Kenneth Stebbings, Vivek Bhan, Daniel B. Schwartz, Bing Xu
  • Patent number: 7991367
    Abstract: A wireless communication unit comprises a transmitter having an analogue feedback power control loop having a power control function arranged to set an output power level of the transmitter. The power control function comprises a predictor sub-system arranged to reduce sensitivity to loop latency of the analogue feedback power control loop. The use of a predictor sub-system provides reduced sensitivity to loop latency, gain variations and delay.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: August 2, 2011
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Patrick J. Pratt, Michael A. Milyard, Daniel B. Schwartz, Philip C. Warder
  • Publication number: 20100311464
    Abstract: A wireless communication unit has two or more communication modes including one or more mobile phone mode, in which mobile phone mode the wireless communication unit is able to transmit or receive wireless signals via an antenna from and/or to a mobile phone network in accordance with a communication protocol. The unit includes a baseband module and a radiofrequency module. A radiofrequency interface of the baseband module is connected to the radiofrequency module, for receiving and/or transmitting baseband signals from and/or to the radiofrequency module. The radiofrequency module includes a baseband interface, for receiving and/or transmitting the baseband signals to the baseband module and an antenna interface (AI) connectable to an antenna for receiving and/or transmitting radiofrequency signals from and/or to the antenna. A clock system is connected to the radiofrequency interface and the baseband interface.
    Type: Application
    Filed: May 25, 2007
    Publication date: December 9, 2010
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Paul Kelleher, Conor Okeeffe, Daniel B. Schwartz, Kevin Traylor
  • Publication number: 20100215133
    Abstract: Apparatus, systems, and methods are provided for transmitting messages over a serial interface. A method comprises receiving a first signal at a first time and receiving a second signal at a second time, the second time being after the first time. If a difference between the second time and the first time is less than a threshold time period, the method comprises generating a first message that is representative of the first signal and the second signal and transmitting the first message over the serial interface. In accordance with one embodiment, the threshold time period is equal to one half of an interface acquisition delay time period associated with the serial interface.
    Type: Application
    Filed: February 25, 2009
    Publication date: August 26, 2010
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Kenneth E. Stebbings, Vivek Bhan, Daniel B. Schwartz
  • Patent number: 7778154
    Abstract: A technique of operating a communication device includes identifying a signal null associated with a signal to be transmitted on a first communication channel. A channel gain of the first communication channel is adjusted at a time that substantially coincides with the signal null to reduce transient noise spectrum coupled from the first communication channel to one or more second communication channels.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: August 17, 2010
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Bing Xu, Pravin Premakanthan, Daniel B. Schwartz
  • Publication number: 20100117824
    Abstract: A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit.
    Type: Application
    Filed: March 26, 2007
    Publication date: May 13, 2010
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Norman Beamish, Wayne Edwrards, Aidan Murphy, Huge O Brien, Conor O'Keeffe, Patrick Pratt, David Redmond, Daniel B. Schwartz, Keith Tilley
  • Publication number: 20100111238
    Abstract: Apparatus, systems, and methods are provided for controlling the output of a transmitter using a digital error signal. A method comprises generating a digital reference signal based on a baseband input signal and converting the digital reference signal to an analog reference signal. The method further comprises generating an analog error signal in response to a difference between the analog reference signal and an analog output signal. The method further comprises generating a digital error signal from the analog error signal, and generating an input signal for the transmitter based on the baseband input signal and the digital error signal.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Bing Xu, Daniel B. Schwartz, Clive K. Tang
  • Publication number: 20100105343
    Abstract: Systems and methods are provided for controlling headroom of an amplifier (e.g., in a transmitter). A method comprises obtaining a target output power for a current interval and obtaining a target headroom for a subsequent interval. The method continues by adjusting, during the current interval, the power output capability of the amplifier based on the target headroom and adjusting the input power of an input signal based on the target output power, such that the output power of the amplifier is substantially constant during the current interval as the power output capability of the amplifier is adjusted.
    Type: Application
    Filed: October 28, 2008
    Publication date: April 29, 2010
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Kenneth E. Stebbings, Vivek Bhan, Daniel B. Schwartz, Bing Xu
  • Publication number: 20100034192
    Abstract: A wireless communication device comprises a first sub-system arranged to pass data to a second sub-system comprising timing synchronisation logic operably coupled to a counter, such that data is sampled by the timing synchronisation logic when passed to the second sub-system from the first sub-system wherein the wireless communication device is characterised in that the timing synchronisation logic is arranged to determine a position of a first data frame and in response thereto initiate a counting process of the counter and determine a position of a second data frame and in response thereto determine a count value from the counting process of the counter and in response to the count value determine whether to initiate a timing advance or timing retard operation on the data being passed to the second sub-system. In this manner, the inventive concept provides the wireless communication device with a mechanism to achieve timing synchronisation.
    Type: Application
    Filed: January 2, 2007
    Publication date: February 11, 2010
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Norman Beamish, Paul Kelleher, Daniel B. Schwartz