公开(公告)号：US20210105034A1

公开(公告)日：2021-04-08

申请号：US17001157

申请日：2020-08-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： ASWATH VS ,  STHANUNATHAN RAMAKRISHNAN ,  SRIRAM MURALI ,  SARMA SUNDARESWARA GUNTURI ,  JAIGANESH BALAKRISHNAN ,  SASHIDHARAN VENKATRAMAN

IPC: H04B1/10 ,  H04B1/16

Abstract: One example includes a receiver system. The receiver system includes an analog-to-digital converter (ADC) configured to convert an analog input signal into a digital output signal at a sampling frequency. The receiver system also includes a spur correction system configured to receive the digital output signal and to estimate spurs associated with the digital output signal and to selectively correct a subset of the spurs associated with a set of frequencies that are based on the sampling frequency.

公开(公告)号：US20150263749A1

公开(公告)日：2015-09-17

申请号：US14656122

申请日：2015-03-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： STHANUNATHAN RAMAKRISHNAN ,  SREENATH NARAYANAN POTTY

IPC: H03M1/12 ,  H03M1/06

CPC classification number: H03M1/121 ,  H03M1/06 ,  H03M1/0626 ,  H03M1/0639 ,  H03M1/1205 ,  H03M1/1215

Abstract: A mismatch corrector can include a correction path comprising a plurality of parallel branches that each includes a correction filter that applies a respective one of a plurality of time domain filter coefficients that corresponds to a function of a mismatch profile of an interleaved analog-to-digital (IADC) signal on the IADC signal. The mismatch corrector can also include a delay path that delays the IADC signal by a predetermined number of samples to provide a delayed version of the IADC signal. The mismatch corrector can further include a summer to subtract an output of each correction filter from the delayed version of the IADC signal to generate a corrected IADC signal.

Abstract translation: 不匹配校正器可以包括校正路径，其包括多个并行分支，每个分支包括校正滤波器，校正滤波器应用与交织的模数转换器的失配曲线的函数相对应的多个时域滤波器系数中的相应一个 （IADC）信号。 不匹配校正器还可以包括将IADC信号延迟预定数量的采样以提供IADC信号的延迟版本的延迟路径。 不匹配校正器还可以包括加法器，以从IADC信号的延迟版本中减去每个校正滤波器的输出，以产生校正的IADC信号。

公开(公告)号：US20150263753A1

公开(公告)日：2015-09-17

申请号：US14656205

申请日：2015-03-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： STHANUNATHAN RAMAKRISHNAN ,  Sashidharan Venkatraman ,  Sreenath Narayanan Potty ,  Sunil Chomal ,  Nagarajan Viswanathan ,  Jawaharlal Tangudu

IPC: H03M1/36 ,  H03M1/08

CPC classification number: H03M1/368 ,  H03M1/06 ,  H03M1/0836 ,  H03M1/1038 ,  H03M1/1085 ,  H03M1/121 ,  H03M1/1215

Abstract: A system can include a signal image correlator receives a discrete frequency domain representation of a signal tone in an interleaved analog-to-digital (IADC) signal and an image of the signal tone in the discrete frequency domain representation of the IADC signal and determines a correlation between the signal tone and the image of the signal tone, a power of the signal tone and a power of the image of the signal tone. The system can also include a frequency domain estimator that determines an instantaneous frequency domain mismatch profile estimate based on the correlation between the signal tone and the image of the signal tone. The system can further include an averaging filter that averages the instantaneous frequency domain mismatch profile estimate over time to provide a frequency domain mismatch profile estimate.

Abstract translation: 系统可以包括信号图像相关器接收交织的模数（IADC）信号中的信号音的离散频域表示和IADC信号的离散频域表示中的信号音的图像，并且确定 信号音和信号音的图像之间的相关性，信号音的功率和信号音的图像的功率。 该系统还可以包括频域估计器，其基于信号音和信号音的图像之间的相关性来确定瞬时频域失配曲线估计。 该系统还可以包括平均滤波器，其对瞬时频域失配曲线估计进行平均以提供频域不匹配曲线估计。