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公开(公告)号：US10211855B2
公开(公告)日：2019-02-19
申请号：US15407679
申请日：2017-01-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Cynthia D. Baringer , Mohiuddin Ahmed , Hsuanyu Pan , Yen-Cheng Kuan , James Chingwei Li , Emilio A. Sovero , Timothy J. Talty
Abstract: A apparatus for dynamically modifying filter characteristics of a delta-sigma modulator in order to receive and transmit radio frequency signals over a wide frequency range. The system is used for wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a cellular radio architecture that employs a combination of a single circulator, programmable band-pass sampling radio frequency (RF) front-end and optimized digital baseband that is capable of supporting all current cellular wireless access protocol frequency bands.
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公开(公告)号：US20180102793A1
公开(公告)日：2018-04-12
申请号：US15286825
申请日：2016-10-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Mohiuddin Ahmed , Cynthia D. Baringer , Jongchan Kang , Yen-Cheng Kuan , James Chingwei Li , Emilio A. Sovero
CPC classification number: H04B1/0003 , H04B1/0032 , H04B1/0035 , H04B1/0039 , H04W84/12 , H04W88/06
Abstract: A method and apparatus for dynamically modifying filter characteristics of a Delta-Sigma modulator. The system is used for wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a cellular radio architecture that employs a combination of a single circulator, programmable band-pass sampling radio frequency (RF) front-end and optimized digital baseband that is capable of supporting all current cellular wireless access protocol frequency bands.
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13.发明授权公开(公告)号：US09755677B2
公开(公告)日：2017-09-05
申请号：US15434000
申请日：2017-02-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Yen-Cheng Kuan , Cynthia D. Baringer , Mohiuddin Ahmed , James Chingwei Li , Hsuanyu Pan , Emilio A. Sovero
IPC: H04B1/16 , H04B1/10 , H04B1/3822
CPC classification number: H04B1/0475 , H03F3/24 , H03M1/0673 , H03M1/365 , H03M1/662 , H03M3/408 , H03M3/424 , H04B1/0007 , H04B1/1036 , H04B1/3822 , H04B1/40 , H04B2001/0408 , H04B2001/0425 , H04B2001/1063 , H04L1/0071
Abstract: 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. A transition between the positive and negative values is compared to a desired notch frequency value, and if the difference is greater than a predetermined threshold, an adaptive control circuit calibrates the modulator.
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公开(公告)号：US09698845B2
公开(公告)日：2017-07-04
申请号：US15103298
申请日：2015-11-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Cynthia D. Baringer , Mohiuddin Ahmed , Albert E. Cosand , James Chingwei Li , Peter Petre , Zhiwei A. Xu , Yen-Cheng Kuan
CPC classification number: H04B1/3822 , H03F3/24 , H03M3/338 , H03M3/408 , H03M3/458 , H03M3/502 , H03M13/27 , H04B1/04 , H04B2001/0408 , H04L1/0071 , H04L25/02
Abstract: 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.
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15.发明申请公开(公告)号：US20170187414A1
公开(公告)日：2017-06-29
申请号：US15433928
申请日：2017-02-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： TIMOTHY J. TALTY , Cynthia D. Baringer , Mohiuddin Ahmed , James Chingwei Li , Yen-Cheng Kuan , Hsuanyu Pan , Emilio A. Sovero
IPC: H04B1/40 , H04B1/3822
CPC classification number: H04B1/0475 , H03F3/24 , H03M1/0673 , H03M1/365 , H03M1/662 , H03M3/408 , H03M3/424 , H04B1/0007 , H04B1/1036 , H04B1/3822 , H04B1/40 , H04B2001/0408 , H04B2001/0425 , H04B2001/1063 , H04L1/0071
Abstract: 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.
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Patent Agency Ranking
16.发明授权公开(公告)号：US09622173B2
公开(公告)日：2017-04-11
申请号：US14744280
申请日：2015-06-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Cynthia D. Baringer , Mohiuddin Ahmed , Albert E. Cosand , James Chingwei Li , Peter Petre , Zhiwei A. Xu , Yen-Cheng Kuan
CPC classification number: H04W52/0209 , H04B1/006 , H04B1/0475 , H04B1/1018 , Y02D70/1224 , Y02D70/142 , Y02D70/40
Abstract: 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.
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公开(公告)号：US10404293B2
公开(公告)日：2019-09-03
申请号：US15646409
申请日：2017-07-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Cynthia D. Baringer , Mohiuddin Ahmed , Jongchan Kang , Yen-Cheng Kuan , James Chingwei Li , Emilio A. Sovero
IPC: H04B1/10 , H04B1/00 , H04L27/26 , H04B7/0413 , H04W84/12
Abstract: A method and apparatus for dynamically modifying filter characteristics of a Delta-Sigma modulator to accommodate for Doppler shift. A transceiver in a wireless cellular communication system for adapt to changes in the RF carrier frequency for maintaining signal integrity by applying a pilot tone in calibration to determine a frequency shift response for a bandpass filter. During operation, the system is operative to determine a Doppler shift and to shift the bandpass filter in response.
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公开(公告)号：US09985809B2
公开(公告)日：2018-05-29
申请号：US15103310
申请日：2015-11-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Cynthia D. Baringer , Mohiuddin Ahmed , Albert E. Cosand , James Chingwei Li , Peter Petre , Zhiwei A. Xu , Yen-Cheng Kuan
Abstract: A cellular radio architecture that includes a programmable bandpass sampling radio frequency front-end and an optimized digital baseband. The architecture includes a receiver module having a plurality of signal channels for different frequency bands, 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 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. The architecture also includes a dual self-cancellation circuit providing digital and analog cancellation of the transmit signal in the receiver module.
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公开(公告)号：US09853843B2
公开(公告)日：2017-12-26
申请号：US15103287
申请日：2015-11-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Cynthia D. Baringer , Mohiuddin Ahmed , Albert E. Cosand , James Chingwei Li , Peter Petre , Zhiwei A. Xu , Yen-Cheng Kuan
Abstract: A cellular radio architecture that includes a multiplexer coupled to an antenna structure and including multiple 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 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 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.
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20.发明授权公开(公告)号：US09780942B2
公开(公告)日：2017-10-03
申请号：US14744303
申请日：2015-06-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Timothy J. Talty , Cynthia D. Baringer , Mohiuddin Ahmed , Albert E. Cosand , James Chingwei Li , Peter Petre , Zhiwei A. Xu , Yen-Cheng Kuan
CPC classification number: H04L5/1461 , H04B1/001 , H04L5/001 , H04L5/0023
Abstract: 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.
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