Patents by Inventor Gerard Klahn
Gerard Klahn 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: 9602144Abstract: The present invention is related to a method and apparatus for processing multiple wireless communication services in a receiver. A receiver receives more than one wireless communication service simultaneously via a wireless interface. Each service is transmitted via a different carrier frequency band. The multiple received carrier signals are down-converted to an intermediate frequency (IF) band using a mixer and a local oscillator (LO). The LO frequencies are set such that the down-converted IF bands of the multiple services are fallen into a single IF band.Type: GrantFiled: June 20, 2005Date of Patent: March 21, 2017Assignee: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Erica Ellyn Aycin, Gerard Klahn, Tanbir Haque
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Patent number: 7660561Abstract: Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink is obtained by giving priority to the antenna receiving a better/best quality signal. Measurements are taken by at least a channel estimator during each time slot to determine the weighting to be given to the antenna with the better/best quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal. The techniques described herein may be used individually, and in some cases are combined to receive additional benefits in efficiency. For example, one or more of recent and/or current channel estimation, history, optimization may be employed, in addition to channel estimation, to determine signal quality.Type: GrantFiled: January 22, 2004Date of Patent: February 9, 2010Assignee: InterDigital Technology CorporationInventors: Leonid Kazakevich, Gerard Klahn, Fatih Ozluturk
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Publication number: 20080214125Abstract: A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measurements and/or PA direct current (DC) consumption measurements, depending on whether the PA is a linear PA or a switch-mode PA. In another embodiment, a hybrid PA including a first stage linear PA and a second stage switch-mode PA is implemented in a transmitter. The hybrid PA selectively connects the output of the first stage linear PA to one of the input of the second stage switch-mode PA and the output of the hybrid PA, depending on the output power level of the first stage linear PA, the output power level of the hybrid PA, or a requirement indicated by a transmit power control (TPC) command.Type: ApplicationFiled: May 15, 2008Publication date: September 4, 2008Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Tanbir Haque, Alpaslan Demir, Leonid Kazakevich, Gerard Klahn
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Patent number: 7379714Abstract: A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measurements and/or PA direct current (DC) consumption measurements, depending on whether the PA is a linear PA or a switch-mode PA. In another embodiment, a hybrid PA including a first stage linear PA and a second stage switch-mode PA is implemented in a transmitter. The hybrid PA selectively connects the output of the first stage linear PA to one of the input of the second stage switch-mode PA and the output of the hybrid PA, depending on the output power level of the first stage linear PA, the output power level of the hybrid PA, or a requirement indicated by a transmit power control (TPC) command.Type: GrantFiled: December 27, 2004Date of Patent: May 27, 2008Assignee: InterDigital Technology CorporationInventors: Tanbir Haque, Alpaslan Demir, Leonid Kazakevich, Gerard Klahn
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Publication number: 20060046773Abstract: The present invention is related to a method and apparatus for processing multiple wireless communication services in a receiver. A receiver receives more than one wireless communication service simultaneously via a wireless interface. Each service is transmitted via a different carrier frequency band. The multiple received carrier signals are down-converted to an intermediate frequency (IF) band using a mixer and a local oscillator (LO). The LO frequencies are set such that the down-converted IF bands of the multiple services are fallen into a single IF band.Type: ApplicationFiled: June 20, 2005Publication date: March 2, 2006Applicant: InterDigital Technology CorporationInventors: Erica Aycin, Gerard Klahn, Tanbir Haque
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Publication number: 20060045126Abstract: The present invention is related to a method and apparatus for adaptively selecting local oscillator (LO) and sampling frequencies for analog-to-digital conversion of a plurality of input signals for transmitting two or more services via two or more frequency bands. Each input signal carries a different service via a different frequency band. Each service is subject to a minimum signal-to-interference, noise and distortion ratio (SINAD) requirement. The input signals are converted to an intermediate frequency (IF) band signals by mixing the input signals with LO signals. The LO and sampling frequencies are adjusted such that the converted IF band signals of the input signals are spectrally adjacent or overlapping each other to some degree. SINAD of the services is measured at each of a plurality of spectrally overlapping conditions. The LO frequencies and the sampling frequency are then adjusted based on the SINAD measurement results.Type: ApplicationFiled: June 27, 2005Publication date: March 2, 2006Applicant: InterDigital Technology CorporationInventors: Gerard Klahn, Fryderyk Tyra, John Haim, Tanbir Haque
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Publication number: 20050226345Abstract: Apparatus for reducing adjacent channel interference between proximate wireless communication units. Each wireless communication unit includes a digital baseband circuit and an analog baseband circuit. The digital baseband circuit includes at least one group delay compensation equalizer and at least one finite-impulse response (FIR) filter. The analog baseband circuit includes a radio (transmitter section), a power amplifier and a narrowband filter. The narrowband filter compensates for deficiencies of the power amplifier including distortion and radio frequency (RF) power spill over. The group delay compensation filter compensates for undesired characteristics (e.g., group delay variation) exhibited by the narrowband filter.Type: ApplicationFiled: March 21, 2005Publication date: October 13, 2005Applicant: InterDigital Technology CorporationInventors: Gerard Klahn, Robert Troiano, Fryderyk Tyra, Timothy Axness
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Publication number: 20050227640Abstract: A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measurements and/or PA direct current (DC) consumption measurements, depending on whether the PA is a linear PA or a switch-mode PA. In another embodiment, a hybrid PA including a first stage linear PA and a second stage switch-mode PA is implemented in a transmitter. The hybrid PA selectively connects the output of the first stage linear PA to one of the input of the second stage switch-mode PA and the output of the hybrid PA, depending on the output power level of the first stage linear PA, the output power level of the hybrid PA, or a requirement indicated by a transmit power control (TPC) command.Type: ApplicationFiled: December 27, 2004Publication date: October 13, 2005Applicant: InterDigital Technology CorporationInventors: Tanbir Haque, Alpaslan Demir, Leonid Kazakevich, Gerard Klahn
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Publication number: 20040156458Abstract: Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink is obtained by giving priority to the antenna receiving a better/best quality signal. Measurements are taken by at least a channel estimator during each time slot to determine the weighting to be given to the antenna with the better/best quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal. The techniques described herein may be used individually, and in some cases are combined to receive additional benefits in efficiency. For example, one or more of recent and/or current channel estimation, history, optimization may be employed, in addition to channel estimation, to determine signal quality.Type: ApplicationFiled: January 2, 2004Publication date: August 12, 2004Applicant: InterDigital Technology CorporationInventors: Leonid Kazakevich, Gerard Klahn, Fatih Ozluturk
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Patent number: 6714769Abstract: Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink wherein priority is given to the antenna receiving a better quality signal. Measurements are taken during each time slot to determine the weighting to be given to the antenna with the better quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal the techniques described herein may be used individual, and in some cases are combined to receive additional benefits in efficiency.Type: GrantFiled: December 23, 2002Date of Patent: March 30, 2004Assignee: InterDigital Technology CorporationInventors: Leonid Kazakevich, Gerard Klahn, Fatih Ozluturk
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Publication number: 20030171099Abstract: Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink wherein priority is given to the antenna receiving a better quality signal. Measurements are taken during each time slot to determine the weighting to be given to the antenna with the better quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal the techniques described herein may be used individual, and in some cases are combined to receive additional benefits in efficiency.Type: ApplicationFiled: December 23, 2002Publication date: September 11, 2003Applicant: InterDigital Technology CorporationInventors: Leonid Kazakevich, Gerard Klahn, Fatih Ozluturk