公开(公告)号：US20180205367A1

公开(公告)日：2018-07-19

申请号：US15406338

申请日：2017-01-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： EMILIO A. SOVERO ,  JONGCHAN KANG ,  MOHIUDDIN AHMED ,  JAMES CHINGWEI LI ,  CYNTHIA D. BARINGER ,  YEN-CHENG KUAN ,  TIMOTHY J. TALTY

IPC: H03J3/18 ,  H03H11/04 ,  H03J3/20

CPC classification number: H03J3/185 ,  H03H11/1256 ,  H03H2210/012 ,  H03H2210/028 ,  H03J3/18 ,  H03J3/20 ,  H03J2200/33

Abstract: A single-chip tunable bandpass filter is provided having a bandpass filter circuit with all tuning components for the bandpass filter circuit formed on the single-chip to provide a programmed center frequency for the tunable bandpass filter. The bandpass filter circuit may include, but is not limited to, a plurality of serially coupled singe stage biquad filter circuits coupled to an input formed on the single-chip and configured to provide a bandpass filtered output signal to an output formed on the single-chip. The bandpass filtered output may be provided by an output buffer formed on the single-chip. The single-chip includes at least one tuning input to receive data for tuning stored in a data register formed on the single-chip. The data register provides control bits to the tuning components that include a programmable resistor responsive to the control bits to vary the programmable resistor to adjust programmed center frequency.

公开(公告)号：US20170187401A1

公开(公告)日：2017-06-29

申请号：US15433964

申请日：2017-02-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： TIMOTHY J. TALTY ,  EMILIO A. SOVERO ,  MOHIUDDIN AHMED ,  CYNTHIA D. BARINGER ,  JAMES CHINGWEI LI ,  YEN-CHENG KUAN ,  HSUANYU PAN

IPC: H04B1/04

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 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.

公开(公告)号：US20170187406A1

公开(公告)日：2017-06-29

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: H04B1/10

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.

公开(公告)号：US20170163295A1

公开(公告)日：2017-06-08

申请号：US15433991

申请日：2017-02-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： TIMOTHY J. TALTY ,  MOHIUDDIN AHMED ,  CYNTHIA D. BARINGER ,  YEN-CHENG KUAN ,  JAMES CHINGWEI LI ,  HSUANYU PAN ,  EMILIO A. SOVERO

IPC: H04B1/04 ,  H04B1/40

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 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.

公开(公告)号：US20160308551A1

公开(公告)日：2016-10-20

申请号：US15103256

申请日：2015-11-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： 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

IPC: H03M1/66 ,  H04B1/3822 ,  H04B1/40 ,  H04B1/04 ,  H04L1/00

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 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.

Abstract translation: 一种蜂窝无线电架构，包括可编程带通采样射频前端和优化的数字基带。 该架构包括具有信号路径的多路复用器，该信号路径包括通过与其它带通滤波器不同频带的带通滤波器，以及在发射信号和接收信号之间提供信号隔离的循环器。 该架构还包括具有针对复用器中的每个信号路径的单独信号通道的接收器模块，其中接收器模块中的每个信号通道包括将模拟接收信号转换为代表性数字信号的接收器Δ-Σ调制器。 该架构还包括具有发射机Δ-Σ调制器的发射机模块，用于将数字数据位转换为模拟发射信号，其中发射机模块包括功率放大器和用于将发射信号引导到多路复用器中的信号路径之一的开关。