Patents by Inventor Yen-Cheng Kuan
Yen-Cheng Kuan 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: 9813089Abstract: A cellular radio architecture that includes an RF transmitter having a digital signal processor, a digital-to-analog converter (DAC) module that converts digital bits from the processor to an analog signal, a tunable bandpass filter that removes frequencies in the analog signal outside of a frequency band of interest, and a power amplifier that amplifies the filtered analog signal. The architecture also includes a calibration feedback device that receives the amplified analog signal and provides a feedback signal to the processor for calibrating the digital signal to provide amplified amplifier pre-distortion. The processor employs a noise-shaping operation to shape the analog signal from the DAC to remove quantization noise in an immediate vicinity of the signal to improve signal-to-noise ratio, performs an infinite impulse response process to lower a noise floor in the analog signal, and provides pre-distortion of the digital signal to compensate for non-linearties of the power amplifier.Type: GrantFiled: February 15, 2017Date of Patent: November 7, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Emilio A. Sovero, Mohiuddin Ahmed, Cynthia D. Baringer, James Chingwei Li, Yen-Cheng Kuan, Hsuanyu Pan
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Patent number: 9780942Abstract: A cellular radio architecture for a vehicle that includes a receiver module having a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals. Portions of the receiver and transmitter modules are fabricated with indium phosphide (InP) technologies and portions of the receiver and transmitter modules are fabricated with CMOS technologies.Type: GrantFiled: June 19, 2015Date of Patent: October 3, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9755677Abstract: A cellular radio architecture that includes a receiver module having a delta-sigma modulator that converts analog signals to digital signals and a Fast-Fourier transform (FFT) circuit that converts the digital signals to frequency spectrum signals. The architecture also includes a moving average circuit that smoothes out the frequency spectrum signals by applying a moving average to the signals. The architecture further includes a differentiator circuit that differentiates the frequency spectrum signals to make the signals linear, and a minimum finding circuit that converts the differentiated frequency spectrum signals into positive values for frequencies above a notch frequency in the differentiated signals and negative values for frequencies below the notch frequency in the differentiated signals.Type: GrantFiled: February 15, 2017Date of Patent: September 5, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Yen-Cheng Kuan, Cynthia D. Baringer, Mohiuddin Ahmed, James Chingwei Li, Hsuanyu Pan, Emilio A. Sovero
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Patent number: 9722638Abstract: A cellular radio architecture for a vehicle that includes a triplexer coupled to an antenna structure and including three signal paths, where each signal path includes a bandpass filter that passes a different frequency band than the other bandpass filters and a circulator that provides signal isolation between the transmit signals and the receive signals. The architecture also includes a receiver module having a separate signal channel for each of the signal paths in the triplexer, where each signal channel in the receiver module includes a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The delta-sigma modulator includes an LC filter having a plurality of LC resonator circuits, a plurality of transconductance amplifiers and a plurality of integrator circuits, where a combination of one resonator circuit, transconductance amplifier and integrator circuit represents a two-order stage of the LC filter.Type: GrantFiled: June 19, 2015Date of Patent: August 1, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Andrew J. MacDonald, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9722647Abstract: A cellular radio architecture that includes a transceiver front-end circuit including an antenna and a switch module having a switching network that directs analog transmit signals to be transmitted to the antenna and receives receive signals from the antenna. The architecture further includes a receiver module having a separate signal channel for each of the signal paths in the multiplexer module, where each signal channel in the receiver module includes a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture also includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to the transmit signals. The transmitter module includes a tunable bandpass filter and a power amplifier for amplifying the transmit signals before transmitting. The architecture also includes a calibration feedback and switch module that receives the amplified signals from the power amplifier.Type: GrantFiled: February 15, 2017Date of Patent: August 1, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Mohiuddin Ahmed, Cynthia D. Baringer, Yen-Cheng Kuan, James Chingwei Li, Hsuanyu Pan, Emilio A. Sovero
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Patent number: 9698855Abstract: A cellular radio architecture that includes a receiver module having a delta-sigma modulator that includes a plurality of gm cells configured in stages, where each stage includes at least two gm cells and an LC filter circuit. The gm cells in each stage can be controlled to be active or inactive to convert, for example, the modulator from a fourth order modulator to a second order modulator to reduce power dissipation. Further, the gm cells can be controlled to optimize a dynamic range of the modulator and to redirect current from inactive cells to active cells in order to optimize power consumption.Type: GrantFiled: February 15, 2017Date of Patent: July 4, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, James Chingwei Li, Yen-Cheng Kuan, Hsuanyu Pan, Emilio A. Sovero
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Patent number: 9698845Abstract: An RF transmitter module for a cellular radio that includes a delta-sigma modulator having a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate. An interleaver controller controls the DEM circuits so as to provide groups of the digital bits at different points in time. In one embodiment, a summation junction adds the groups of the digital bits to provide a continuous stream of the interleaved digital bits, a DAC converts the stream of interleaved digital bits to an analog signal, and a power amplifier amplifies the analog signal.Type: GrantFiled: November 6, 2015Date of Patent: July 4, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Publication number: 20170187401Abstract: A cellular radio architecture that includes an RF transmitter having a digital signal processor, a digital-to-analog converter (DAC) module that converts digital bits from the processor to an analog signal, a tunable bandpass filter that removes frequencies in the analog signal outside of a frequency band of interest, and a power amplifier that amplifies the filtered analog signal. The architecture also includes a calibration feedback device that receives the amplified analog signal and provides a feedback signal to the processor for calibrating the digital signal to provide amplified amplifier pre-distortion. The processor employs a noise-shaping operation to shape the analog signal from the DAC to remove quantization noise in an immediate vicinity of the signal to improve signal-to-noise ratio, performs an infinite impulse response process to lower a noise floor in the analog signal, and provides pre-distortion of the digital signal to compensate for non-linearties of the power amplifier.Type: ApplicationFiled: February 15, 2017Publication date: June 29, 2017Inventors: TIMOTHY J. TALTY, EMILIO A. SOVERO, MOHIUDDIN AHMED, CYNTHIA D. BARINGER, JAMES CHINGWEI LI, YEN-CHENG KUAN, HSUANYU PAN
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Publication number: 20170187414Abstract: A cellular radio architecture that includes a receiver module having a delta-sigma modulator that includes a plurality of gm cells configured in stages, where each stage includes at least two gm cells and an LC filter circuit. The gm cells in each stage can be controlled to be active or inactive to convert, for example, the modulator from a fourth order modulator to a second order modulator to reduce power dissipation. Further, the gm cells can be controlled to optimize a dynamic range of the modulator and to redirect current from inactive cells to active cells in order to optimize power consumption.Type: ApplicationFiled: February 15, 2017Publication date: June 29, 2017Inventors: TIMOTHY J. TALTY, Cynthia D. Baringer, Mohiuddin Ahmed, James Chingwei Li, Yen-Cheng Kuan, Hsuanyu Pan, Emilio A. Sovero
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Publication number: 20170187406Abstract: A cellular radio architecture that includes a receiver module having a delta-sigma modulator that converts analog signals to digital signals and a Fast-Fourier transform (FFT) circuit that converts the digital signals to frequency spectrum signals. The architecture also includes a moving average circuit that smoothes out the frequency spectrum signals by applying a moving average to the signals. The architecture further includes a differentiator circuit that differentiates the frequency spectrum signals to make the signals linear, and a minimum finding circuit that converts the differentiated frequency spectrum signals into positive values for frequencies above a notch frequency in the differentiated signals and negative values for frequencies below the notch frequency in the differentiated signals.Type: ApplicationFiled: February 15, 2017Publication date: June 29, 2017Inventors: TIMOTHY J. TALTY, YEN-CHENG KUAN, CYNTHIA D. BARINGER, MOHIUDDIN AHMED, JAMES CHINGWEI LI, HSUANYU PAN, EMILIO A. SOVERO
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Patent number: 9692458Abstract: A cellular radio architecture for a vehicle that includes a programmable bandpass sampling radio frequency front-end and an optimized digital baseband. The architecture includes a triplexer having signal paths that include a bandpass filter that passes a different frequency band than the other bandpass filters and a circulator that provides signal isolation between the transmit signals and the receive signals. The architecture also includes a receiver module having a separate signal channel for each of the signal paths in the triplexer, where each signal channel in the receiver module includes a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals, where the transmitter module includes a power amplifier and a switch for directing the transmit signals to one of the signal paths in the triplexer.Type: GrantFiled: June 19, 2015Date of Patent: June 27, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Andrew J. MacDonald, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Publication number: 20170163295Abstract: A cellular radio architecture that includes a transceiver front-end circuit including an antenna and a switch module having a switching network that directs analog transmit signals to be transmitted to the antenna and receives receive signals from the antenna. The architecture further includes a receiver module having a separate signal channel for each of the signal paths in the multiplexer module, where each signal channel in the receiver module includes a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture also includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to the transmit signals. The transmitter module includes a tunable bandpass filter and a power amplifier for amplifying the transmit signals before transmitting. The architecture also includes a calibration feedback and switch module that receives the amplified signals from the power amplifier.Type: ApplicationFiled: February 15, 2017Publication date: June 8, 2017Inventors: TIMOTHY J. TALTY, MOHIUDDIN AHMED, CYNTHIA D. BARINGER, YEN-CHENG KUAN, JAMES CHINGWEI LI, HSUANYU PAN, EMILIO A. SOVERO
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Patent number: 9660690Abstract: A cellular radio architecture that includes a receiver module having a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals. Portions of the receiver and transmitter modules are fabricated with silicon germanium (SiGe) technologies and portions of the receiver and transmitter modules are fabricated with CMOS technologies.Type: GrantFiled: November 6, 2015Date of Patent: May 23, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9648562Abstract: A transceiver front-end circuit for a cellular radio architecture for a vehicle, where the transceiver circuit employs components for reducing power consumption. The transceiver circuit includes a receiver module having a delta-sigma modulator that converts analog receive signals to a representative digital signal in an interleaving process, where the delta-sigma modulator includes a combiner, a low noise amplifier (LNA), an LC filter and a quantizer circuit. The LC filter is a multi-order filter and the quantizer circuit is an interleaving quantizer circuit that interleaves multiple groups of bits from the filter. The order of the LC filter is selectively reduced in situations where a full dynamic range of the cellular radio is not required and a bit resolution of the quantizer circuit is reduced so as to reduce the power requirements of the cellular radio.Type: GrantFiled: July 25, 2016Date of Patent: May 9, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9622173Abstract: A method for reducing power consumption in a transceiver front-end circuit for a cellular radio. The transceiver circuit includes a receiver module having a delta-sigma modulator that converts analog receive signals to a representative digital signal in an interleaving process, where the delta-sigma modulator includes a combiner, a low noise amplifier (LNA), an LC filter and a quantizer circuit. The LC filter is a multi-order filter and the quantizer circuit is an interleaving quantizer circuit that interleaves multiple groups of bits from the filter. The method includes selectively reducing the order of the LC filter in situations where a full dynamic range of the cellular radio is not required and reducing a bit resolution of the quantizer circuit so as to reduce the power requirements of the cellular radio.Type: GrantFiled: June 19, 2015Date of Patent: April 11, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9622181Abstract: A method for reducing power consumption in a transceiver front-end circuit for a cellular radio. The transceiver circuit includes a receiver module having a delta-sigma modulator that converts analog receive signals to a representative digital signal in an interleaving process, where the delta-sigma modulator includes a low noise amplifier (LNA), an LC filter and a quantizer circuit. The LC filter is a multi-order filter and the quantizer circuit is an interleaving quantizer circuit that interleaves multiple groups of bits from the filter. The method includes selectively reducing the order of the LC filter in situations where a full dynamic range of the cellular radio is not required and reducing a bit resolution of the quantizer circuit so as to reduce the power requirements of the cellular radio.Type: GrantFiled: November 6, 2015Date of Patent: April 11, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9608661Abstract: A cellular radio architecture that includes a programmable bandpass sampling radio frequency front-end and an optimized digital baseband. The architecture includes a multiplexer having signal paths that include a bandpass filter that passes a different frequency band than the other bandpass filters and a circulator that provides signal isolation between the transmit signals and the receive signals. The architecture also includes a receiver module having a separate signal channel for each of the signal paths in the multiplexer, where each signal channel in the receiver module includes a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals, where the transmitter module includes a power amplifier and a switch for directing the transmit signals to one of the signal paths in the multiplexer.Type: GrantFiled: November 6, 2015Date of Patent: March 28, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Andrew J. MacDonald, Mohiuddin Ahmed, Albert E. Cosand, James Chingwei Li, Peter Petre, Zhiwei A. Xu, Yen-Cheng Kuan, Hsuanyu Pan, Emilio A. Sovero
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Patent number: 9581681Abstract: A radar system in which Coded Aperture Radar processing is performed on received radar signals reflected by one or more objects in a field of view which reflect a transmitted signal which covers a field of view with K sweeps and each sweep including Q frequency changes. For Type II CAR, the transmitted signal also includes N modulated codes per frequency step. The received radar signals are modulated by a plurality of binary modulators the results of which are applied to a mixer. The output of the mixer, for one acquisition results in a set of Q·K (for Type I CAR) or Q·K·N (for Type II CAR) complex data samples, is distributed among a number of digital channels, each corresponding to a desired beam direction. For each channel, the complex digital samples are multiplied, sample by sample, by a complex signal mask that is different for each channel.Type: GrantFiled: December 4, 2014Date of Patent: February 28, 2017Assignee: HRL Laboratories, LLCInventors: Jonathan J. Lynch, Zhiwei A. Xu, Yen-Cheng Kuan
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Patent number: 9537514Abstract: An RF transmitter module for a cellular radio that includes a delta-sigma modulator having a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate. An interleaver controller controls the DEM circuits so as to provide groups of the digital bits at different points in time. In one embodiment, a summation junction adds the groups of the digital bits to provide a continuous stream of the interleaved digital bits, a DAC converts the stream of interleaved digital bits to an analog signal, and a power amplifier amplifies the analog signal.Type: GrantFiled: June 19, 2015Date of Patent: January 3, 2017Assignee: GM Global Technology Operations LLCInventors: Timothy J. Talty, Zhiwei A. Xu, Mohiuddin Ahmed, Cynthia D. Baringer, Albert E. Cosand, James Chingwei Li, Yen-Cheng Kuan, Peter Petre
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Patent number: 9531571Abstract: An agile transceiver including a receiver channel that includes an input, a coarse tracking filter coupled to the input, the coarse tracking filter having a set of at least two bandpass filters for filtering signals from the input into at least two coarse pass bands, a mixer coupled to an output of the coarse tracking filter, a selected local oscillator coupled to the mixer for mixing with the output of the coarse tracking filter and shifting a desired coarse pass band to near a base band, a fine tracking filter for filtering the shifted and desired coarse pass band to a fine pass band, and a band pass ?? demodulator for converting signals in the fine pass band from analog into digital. The agile transceiver may include a corresponding transmitter channel.Type: GrantFiled: December 31, 2013Date of Patent: December 27, 2016Assignee: HRL Laboratories, LLCInventors: Zhiwei A. Xu, Yen-Cheng Kuan, James Chingwei Li, Donald A. Hitko, Joseph F. Jensen