Patents by Inventor Dimitris Nalbantis
Dimitris Nalbantis 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: 10075202Abstract: Methods and apparatus are provided for detection path design for reflection coefficient estimation. In one novel aspect, a hardware-based phase estimator estimates a phase shift between the forward path signal and the reverse path signal. In one embodiment, a data selector is used to pass only signals above a magnitude threshold. In another embodiment, a modified phase unwrap algorithm stores an unwrapping correction for subsequent samples and updates the stored unwrapping correction upon processing of each sample processed. In another novel aspect, mixed hardware and software solutions are used. In one embodiment, the reference signal and the detection signals are matched such that the modulation signal interference is removed. In some embodiments, one or two power detectors and a cross-correlator are used. In yet another embodiment, two detection measurement paths are used to obtain the reflection coefficient. In one embodiment, fractional timing offset is estimated to obtain the reflection coefficient.Type: GrantFiled: July 28, 2017Date of Patent: September 11, 2018Assignee: MEDIATEK INC.Inventors: Ming-Chou Wu, Dimitris Nalbantis, Qiang Zhou, Bernard Mark Tenbroek, Ting-Hsuan Kuo
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Publication number: 20170331503Abstract: Methods and apparatus are provided for detection path design for reflection coefficient estimation. In one novel aspect, a hardware-based phase estimator estimates a phase shift between the forward path signal and the reverse path signal. In one embodiment, a data selector is used to pass only signals above a magnitude threshold. In another embodiment, a modified phase unwrap algorithm stores an unwrapping correction for subsequent samples and updates the stored unwrapping correction upon processing of each sample processed. In another novel aspect, mixed hardware and software solutions are used. In one embodiment, the reference signal and the detection signals are matched such that the modulation signal interference is removed. In some embodiments, one or two power detectors and a cross-correlator are used. In yet another embodiment, two detection measurement paths are used to obtain the reflection coefficient. In one embodiment, fractional timing offset is estimated to obtain the reflection coefficient.Type: ApplicationFiled: July 28, 2017Publication date: November 16, 2017Inventors: Ming-Chou Wu, Dimitris Nalbantis, Qiang Zhou, Bernard Mark Tenbroek, Ting-Hsuan Kuo
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Patent number: 9762267Abstract: Methods and apparatus are provided for detection path design for reflection coefficient estimation. In one novel aspect, a hardware-based phase estimator estimates a phase shift between the forward path signal and the reverse path signal. In one embodiment, a data selector is used to pass only signals above a magnitude threshold. In another embodiment, a modified phase unwrap algorithm stores an unwrapping correction for subsequent samples and updates the stored unwrapping correction upon processing of each sample processed. In another novel aspect, mixed hardware and software solutions are used. In one embodiment, the reference signal and the detection signals are matched such that the modulation signal interference is removed. In some embodiments, one or two power detectors and a cross-correlator are used. In yet another embodiment, two detection measurement paths are used to obtain the reflection coefficient. In one embodiment, fractional timing offset is estimated to obtain the reflection coefficient.Type: GrantFiled: January 20, 2016Date of Patent: September 12, 2017Assignee: MEDIATEK INC.Inventors: Ming-Chou Wu, Dimitris Nalbantis, Qiang Zhou, Bernard Mark Tenbroek, Ting-Hsuan Kuo
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Publication number: 20160211870Abstract: Methods and apparatus are provided for detection path design for reflection coefficient estimation. In one novel aspect, a hardware-based phase estimator estimates a phase shift between the forward path signal and the reverse path signal. In one embodiment, a data selector is used to pass only signals above a magnitude threshold. In another embodiment, a modified phase unwrap algorithm stores an unwrapping correction for subsequent samples and updates the stored unwrapping correction upon processing of each sample processed. In another novel aspect, mixed hardware and software solutions are used. In one embodiment, the reference signal and the detection signals are matched such that the modulation signal interference is removed. In some embodiments, one or two power detectors and a cross-correlator are used. In yet another embodiment, two detection measurement paths are used to obtain the reflection coefficient. In one embodiment, fractional timing offset is estimated to obtain the reflection coefficient.Type: ApplicationFiled: January 20, 2016Publication date: July 21, 2016Inventors: Ming-Chou Wu, Dimitris Nalbantis, Qiang Zhou, Bernard Mark Tenbroek, Ting-Hsuan Kuo
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Patent number: 9219554Abstract: A communication device with a power detection scheme is disclosed. The communication device includes a transmitter for transmitting an RF signal, a demodulator for demodulating the RF signal by utilizing a phase-modulated (PM) signal provided from the transmitter to generate a demodulated signal, a loopback circuit coupled between the transmitter and the demodulator for transmitting the RF signal and the PM signal from the transmitter to the demodulator when the power detection scheme is enabled, and a power detector for detecting power of the demodulated signal.Type: GrantFiled: January 17, 2013Date of Patent: December 22, 2015Assignee: MEDIATEK INC.Inventors: Hsin-Hung Chen, Hsiang-Hui Chang, Dimitris Nalbantis, Bernard Mark Tenbroek
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Patent number: 8326340Abstract: A transmit power control system includes: an output power estimator for estimating a transmit power of a transmitter; and a transmit power controller responsive to the output power estimator and to compare this with a requested power in order to calculate a target power which takes account of errors within the transmit power control system, and to vary a gain of an amplifier in a transmit signal path so as to reduce an error between the transmit power of the amplifier and the requested power.Type: GrantFiled: November 21, 2008Date of Patent: December 4, 2012Assignee: Mediatek Inc.Inventors: Dimitris Nalbantis, Christopher Geraint Jones, Bernard Mark Tenbroek
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Publication number: 20090196223Abstract: A transmit power control system includes: an output power estimator for estimating a transmit power of a transmitter; and a transmit power controller responsive to the output power estimator and to compare this with a requested power in order to calculate a target power which takes account of errors within the transmit power control system, and to vary a gain of an amplifier in a transmit signal path so as to reduce an error between the transmit power of the amplifier and the requested power.Type: ApplicationFiled: November 21, 2008Publication date: August 6, 2009Applicant: MEDIATEK INC.Inventors: Dimitris Nalbantis, Christopher Geraint Jones, Bernard Mark Tenbroek
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Patent number: 7111216Abstract: An integrated circuit is provided in which a scan controller for controlling a scan test is integrated within the integrated circuit and shares the same input pins as a serial programmable interface of the integrated circuit.Type: GrantFiled: April 4, 2003Date of Patent: September 19, 2006Assignee: Analog Devices, Inc.Inventor: Dimitris Nalbantis
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Publication number: 20040148553Abstract: An integrated circuit is provided in which a scan controller for controlling a scan test is integrated within the integrated circuit and shares the same input pins as a serial programmable interface of the integrated circuit.Type: ApplicationFiled: April 4, 2003Publication date: July 29, 2004Applicant: Analog Devices, Inc.Inventor: Dimitris Nalbantis