Patents by Inventor Jaleh Komaili
Jaleh Komaili 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: 10063343Abstract: Apparatus and methods for transmit power control in wireless communication systems are provided. In one aspect, a wireless communication system includes a transmit chain that generates a transmit signal based on a data signal having a time-varying signal envelope, a power amplifier that amplifies the transmit signal, and a transmit chain controller that generates a first power control signal and a second power control signal that control an adjustable power level of the transmit chain. The transmit chain controller includes an error extractor that generates an error signal based on comparing an output signal power of the power amplifier to the time-varying signal envelope. The transmit chain controller further includes a control signal generator that generates the first power control signal and an adjustment signal based on estimating the error signal, and that generates the second power control signal based on the error signal and the adjustment signal.Type: GrantFiled: December 13, 2016Date of Patent: August 28, 2018Assignee: Skyworks Solutions, Inc.Inventors: Dmitriy Rozenblit, Rajasekhar Pullela, Jaleh Komaili, Masoud Kahrizi, Shahrzad Tadjpour
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Publication number: 20170093524Abstract: Apparatus and methods for transmit power control in wireless communication systems are provided. In one aspect, a wireless communication system includes a transmit chain that generates a transmit signal based on a data signal having a time-varying signal envelope, a power amplifier that amplifies the transmit signal, and a transmit chain controller that generates a first power control signal and a second power control signal that control an adjustable power level of the transmit chain. The transmit chain controller includes an error extractor that generates an error signal based on comparing an output signal power of the power amplifier to the time-varying signal envelope. The transmit chain controller further includes a control signal generator that generates the first power control signal and an adjustment signal based on estimating the error signal, and that generates the second power control signal based on the error signal and the adjustment signal.Type: ApplicationFiled: December 13, 2016Publication date: March 30, 2017Inventors: Dmitriy Rozenblit, Rajasekhar Pullela, Jaleh Komaili, Masoud Kahrizi, Shahrzad Tadjpour
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Patent number: 9559808Abstract: Apparatus and methods for power control in mobile communication devices are provided. In one aspect, a wireless communication device includes a transmit chain that receives a digital in-phase (I) signal and a digital quadrature-phase (Q) signal and that generates a transmit signal. The wireless communication device further includes a power amplifier that amplifies the transmit signal, and a transmit chain controller including a reference generator that combines the digital I signal and the digital Q signal and generates a reference signal corresponding to an instantaneous value of an envelope of the combined signal. The transmit chain controller further includes an error extractor that generates an error signal based on the reference signal and an output power of the power amplifier, and a control signal generator that uses the error signal to generate one or more power control signals for controlling an adjustable power level of the transmit chain.Type: GrantFiled: October 30, 2015Date of Patent: January 31, 2017Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Dmitriy Rozenblit, Rajasekhar Pullela, Jaleh Komaili, Masoud Kahrizi, Shahrzad Tadjpour
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Patent number: 9313079Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: GrantFiled: December 10, 2014Date of Patent: April 12, 2016Assignee: Skyworks Solutions, Inc.Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher
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Publication number: 20160056917Abstract: Apparatus and methods for power control in mobile communication devices are provided. In one aspect, a wireless communication device includes a transmit chain that receives a digital in-phase (I) signal and a digital quadrature-phase (Q) signal and that generates a transmit signal. The wireless communication device further includes a power amplifier that amplifies the transmit signal, and a transmit chain controller including a reference generator that combines the digital I signal and the digital Q signal and generates a reference signal corresponding to an instantaneous value of an envelope of the combined signal. The transmit chain controller further includes an error extractor that generates an error signal based on the reference signal and an output power of the power amplifier, and a control signal generator that uses the error signal to generate one or more power control signals for controlling an adjustable power level of the transmit chain.Type: ApplicationFiled: October 30, 2015Publication date: February 25, 2016Inventors: Dmitriy Rozenblit, Rajasekhar Pullela, Jaleh Komaili, Masoud Kahrizi, Shahrzad Tadjpour
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Patent number: 9209770Abstract: Apparatus and methods for power control in mobile communication devices are provided. In one aspect, a method for accurately controlling an adjustable power level of a data signal in a transmit chain of a transmitter is provided. The method includes adjusting a controllable gain level of a digital-to-analog converter based on a desired peak-to-average ratio of a transmit signal envelope, adjusting a digitally controlled discrete gain-step amplifier, the amount of gain per step based on an initial estimate of the transmitter gain and a target power, applying a factor to a gain adjuster responsive to the gain step change in the transmit chain, and repeating the adjusting and applying steps until a feedback signal level exceeds a reference signal level.Type: GrantFiled: October 10, 2014Date of Patent: December 8, 2015Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Dmitriy Rozenblit, Rajasekhar Pullela, Jaleh Komaili, Masoud Kahrizi, Shahrzad Tadjpour
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Publication number: 20150244556Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: ApplicationFiled: December 10, 2014Publication date: August 27, 2015Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher
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Publication number: 20150091754Abstract: A method of tracking a code phase includes configuring local correlators with a first de-spreading local function; de-spreading an incoming signal with the first de-spreading local function to generate a first correlation output; determining a range estimate based on the first de-spreading local function; reconfiguring the local correlators with a second de-spreading local function when a delay-locked loop has locked to a correct correlation peak of the first correlation output; de-spreading the incoming signal with the second de-spreading local function to generate a second correlation output; determining a range estimate based on the second de-spreading local function that has a higher resolution than the range estimate based on the first de-spreading local function; and determining if the delay-locked loop has lost a lock to the correct correlation peak of the second correlation output to determine that the local correlators need to be reconfigured with the first de-spreading local function.Type: ApplicationFiled: October 18, 2013Publication date: April 2, 2015Applicant: Broadcom CorporationInventors: Jaleh KOMAILI, Charles NORMAN, Andreas WARLOE
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Patent number: 8948322Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: GrantFiled: September 16, 2013Date of Patent: February 3, 2015Assignee: Skyworks Solutions, Inc.Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher
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Publication number: 20150023450Abstract: Apparatus and methods for power control in mobile communication devices are provided. In one aspect, a method for accurately controlling an adjustable power level of a data signal in a transmit chain of a transmitter is provided. The method includes adjusting a controllable gain level of a digital-to-analog converter based on a desired peak-to-average ratio of a transmit signal envelope, adjusting a digitally controlled discrete gain-step amplifier, the amount of gain per step based on an initial estimate of the transmitter gain and a target power, applying a factor to a gain adjuster responsive to the gain step change in the transmit chain, and repeating the adjusting and applying steps until a feedback signal level exceeds a reference signal level.Type: ApplicationFiled: October 10, 2014Publication date: January 22, 2015Inventors: Dmitriy Rozenblit, Rajasekhar Pullela, Jaleh Komaili, Masoud Kahrizi, Shahrzad Tadjpour
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Patent number: 8874051Abstract: A transmitter adjusts a transmitted power level by modifying a control input of a variable gain amplifier. A power amplifier control system includes an envelope extractor, an error extractor, and a feed-forward multiplier. The envelope extractor receives data signal inputs and computes the envelope of the combined signal. The error extractor generates an error signal as a function of the combined signal and the output power generated by the power amplifier. The feed-forward multiplier generates a modified error signal that is responsive to a function of the gain in a feedback path. A corresponding method for controlling a power level is also disclosed. In some embodiments, a transmit chain with a power control loop is used to adjust the transmit signal power applied at an input of a variable gain amplifier. A corresponding method for adjusting the transmit signal power level is also included.Type: GrantFiled: December 2, 2011Date of Patent: October 28, 2014Assignee: Skyworks Solutions, Inc.Inventors: Dmitriy Rozenblit, Masoud Kahrizi, Jaleh Komaili, Rajasekhar Pullela, Shahrzad Tadjpour
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Patent number: 8855029Abstract: A transmit signal second-order inter-modulation (IM2) canceller for a portable handset using a full duplex mode of operation (e.g., WCDMA) is used to controllably reduce IM2 introduced by a transmit signal that appears in a received signal in a receive channel of the portable handset. The transmit signal IM2 canceller includes a delay estimator and a digital signal adjuster. The delay estimator receives a first input from a receive channel and a second input from a transmit channel. The delay estimator generates an estimate of the IM2 that the transmit channel introduces in the receive channel. The digital signal adjuster removes the estimate of the IM2 before forwarding a modified receive channel signal to a baseband subsystem of the portable handset.Type: GrantFiled: November 17, 2010Date of Patent: October 7, 2014Assignee: Skyworks Solutions, Inc.Inventors: Masoud Kahrizi, Jaleh Komaili, John E. Vasa
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Publication number: 20140086370Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: ApplicationFiled: September 16, 2013Publication date: March 27, 2014Applicant: SKYWORKS SOLUTIONS, INC.Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher
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Patent number: 8565358Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: GrantFiled: January 30, 2012Date of Patent: October 22, 2013Assignee: Skyworks Solutions, Inc.Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher
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Patent number: 8374297Abstract: A controller and a circuit work together to enable a selective and dynamic adjustment to correct phase and gain imbalances in quadrature signal paths of a receiver. Under select conditions, it has been determined that statistical estimates of gain and phase imbalance can be applied to adjust signals in the quadrature signal paths of a receiver. The controller validates the select conditions before updating the estimate of the gain imbalance and the estimate of the phase imbalance. The controller directs a compensator under select operating conditions such that validated dynamic estimates of the gain and phase imbalance or calibration data is applied to the quadrature signal paths. The controller disables the compensator and enables an estimator and a calculator when estimates are unavailable for the present operating conditions.Type: GrantFiled: September 15, 2008Date of Patent: February 12, 2013Assignee: Intel CorporationInventors: Jaleh Komaili, Thomas Obkircher, William J. Domino
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Patent number: 8265220Abstract: The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission.Type: GrantFiled: October 31, 2007Date of Patent: September 11, 2012Assignee: LG Electronics Inc.Inventors: Jaleh Komaili, Yongbing Wan
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Publication number: 20120183106Abstract: A controller and a circuit work together to enable a selective and dynamic adjustment to correct phase and gain imbalances in quadrature signal paths of a receiver. Under select conditions, it has been determined that statistical estimates of gain and phase imbalance can be applied to adjust signals in the quadrature signal paths of a receiver. The controller validates the select conditions before updating the estimate of the gain imbalance and the estimate of the phase imbalance. The controller directs a compensator under select operating conditions such that validated dynamic estimates of the gain and phase imbalance or calibration data is applied to the quadrature signal paths. The controller disables the compensator and enables an estimator and a calculator when estimates are unavailable for the present operating conditions.Type: ApplicationFiled: March 22, 2012Publication date: July 19, 2012Inventors: Jaleh Komaili, Thomas Obkircher, William J. Domino
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Publication number: 20120170624Abstract: A transmitter adjusts a transmitted power level by modifying a control input of a variable gain amplifier. A power amplifier control system includes an envelope extractor, an error extractor, and a feed-forward multiplier. The envelope extractor receives data signal inputs and computes the envelope of the combined signal. The error extractor generates an error signal as a function of the combined signal and the output power generated by the power amplifier. The feed-forward multiplier generates a modified error signal that is responsive to a function of the gain in a feedback path. A corresponding method for controlling a power level is also disclosed. In some embodiments, a transmit chain with a power control loop is used to adjust the transmit signal power applied at an input of a variable gain amplifier. A corresponding method for adjusting the transmit signal power level is also included.Type: ApplicationFiled: December 2, 2011Publication date: July 5, 2012Applicant: SKYWORKS SOLUTIONS, INC.Inventors: Dmitriy Rozenblit, Masoud Kahrizi, Jaleh Komaili, Rajasekhar Pullela, Shahrzad Tadjpour
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Publication number: 20120134402Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: ApplicationFiled: January 30, 2012Publication date: May 31, 2012Applicant: SKYWORKS SOLUTIONS, INC.Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher
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Patent number: 8126094Abstract: A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.Type: GrantFiled: January 7, 2009Date of Patent: February 28, 2012Assignee: Skyworks Solutions, Inc.Inventors: Jaleh Komaili, John E. Vasa, Thomas Obkircher