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公开(公告)号：US11921229B2
公开(公告)日：2024-03-05
申请号：US17479002
申请日：2021-09-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Muhammad Zubair Ikram , Adeel Ahmad , Dan Wang , Murtaza Ali
IPC: G01S13/44 , G01S7/35 , G01S13/34 , G01S13/931
CPC classification number: G01S7/352 , G01S13/34 , G01S13/343 , G01S13/931
Abstract: An apparatus, including processing unit (PU) cores and computer readable storage devices storing machine instructions for determining a distance between a target object and a radar sensor circuit. The PU cores receive a beat signal generated by the radar sensor circuit and compensate for a phase difference between the received beat signal and a reconstruction of the received beat signal to obtain a phase compensated beat signal. The phase compensated beat signal is then filtered to remove spurious reflections by demodulating the phase compensated beat signal using an estimated frequency of the phase compensated beat signal. The PU cores then apply a low pass filter to the demodulated phase compensated beat signal, resulting in a modified beat signal. The PU cores then determine the distance between the target object and the radar sensor circuit using the modified beat signal.
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2.发明申请公开(公告)号：US20200292687A1
公开(公告)日：2020-09-17
申请号：US16832073
申请日：2020-03-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Murtaza Ali , Dan Wang , Muhammad Zubair Ikram
Abstract: In the proposed low complexity technique a hierarchical approach is created. An initial FFT based detection and range estimation gives a coarse range estimate of a group of objects within the Rayleigh limit or with varying sizes resulting from widely varying reflection strengths. For each group of detected peaks, demodulate the input to near DC, filter out other peaks (or other object groups) and decimate the signal to reduce the data size. Then perform super-resolution methods on this limited data size. The resulting distance estimations provide distance relative to the coarse estimation from the FFT processing.
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公开(公告)号：US10481242B2
公开(公告)日：2019-11-19
申请号：US15145091
申请日：2016-05-03
Applicant: Texas Instruments Incorporated
Inventor： Muhammad Zubair Ikram , Murtaza Ali
Abstract: This invention is present an iterative method for joint antenna array calibration and direction of arrival estimation using millimeter-wave (mm-Wave) radar. The calibration compensates for array coupling, phase, and gain errors and does not require any training data. This method is well suited for applications where multiple antenna elements are packaged in a chip and where offline calibration is either expensive or is not possible. This invention is also effective when the array coupling is a function of direction of arriving waves from the object. It is also applicable to any two-dimensional array shape. Real experiment results demonstrate the viability of the algorithm using real data collected from a four-element array.
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4.发明授权公开(公告)号：US09083783B2
公开(公告)日：2015-07-14
申请号：US14091346
申请日：2013-11-27
Applicant: Texas Instruments Incorporated
Inventor： Muhammad Zubair Ikram
Abstract: A method for acoustic echo cancellation in a communication device is provided that includes receiving a first near-end audio signal in the communication device, wherein the first near-end audio signal comprises acoustic echo of a far-end audio signal reproduced by the communication device, and performing echo cancellation on the first near-end audio signal to generate a second near-end audio signal with at least some of the acoustic echo removed, wherein the echo cancellation is performed responsive to presence or absence of double-talk (DT), and wherein a zero-crossing rate (ZCR) is used to detect the presence or absence of DT.
Abstract translation: 提供一种在通信设备中的声学回声消除的方法，包括：在所述通信设备中接收第一近端音频信号，其中所述第一近端音频信号包括由所述通信设备再现的远端音频信号的声学回声 并且对所述第一近端音频信号执行回波消除以产生除去了至少一些所述声学回声的第二近端音频信号，其中所述回声消除是响应于是否存在双方通话（DT）而被执行的， ，并且其中使用零交叉率（ZCR）来检测DT的存在或不存在。
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5.发明申请公开(公告)号：US20140288926A1
公开(公告)日：2014-09-25
申请号：US14300690
申请日：2014-06-10
Applicant: Texas Instruments Incorporated
Inventor： Devangi N. Parikh , Muhammad Zubair Ikram
IPC: G10L21/0208 , H04M1/60
CPC classification number: G10L21/0208 , G10L21/0272 , H04M1/60
Abstract: A method of interference suppression is provided that includes receiving a first audio signal from a first audio capture device and a second audio signal from a second audio capture device wherein the first audio signal includes a first combination of desired audio content and interference and the second audio signal includes a second combination of the desired audio content and the interference, performing blind source separation using the first audio signal and the second audio signal to generate an output interference signal and an output audio signal including the desired audio content with the interference suppressed, estimating interference remaining in the output audio signal using the output interference signal, and subtracting the estimated interference from the output audio signal to generate a final output audio signal with the interference further suppressed.
Abstract translation: 提供了一种干扰抑制的方法，其包括从第一音频捕获装置接收第一音频信号和从第二音频捕获装置接收第二音频信号，其中第一音频信号包括期望的音频内容和干扰的第一组合以及第二音频 信号包括所需音频内容和干扰的第二组合，使用第一音频信号和第二音频信号执行盲源分离，以产生输出干扰信号和输出音频信号，所述输出干扰信号包括所抑制的干扰所需的音频内容，估计 使用输出干扰信号留在输出音频信号中的干扰，以及从输出音频信号中减去所估计的干扰，以产生进一步抑制干扰的最终输出音频信号。
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Patent Agency Ranking
公开(公告)号：US11327166B2
公开(公告)日：2022-05-10
申请号：US16832073
申请日：2020-03-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Murtaza Ali , Dan Wang , Muhammad Zubair Ikram
Abstract: In the proposed low complexity technique a hierarchical approach is created. An initial FFT based detection and range estimation gives a coarse range estimate of a group of objects within the Rayleigh limit or with varying sizes resulting from widely varying reflection strengths. For each group of detected peaks, demodulate the input to near DC, filter out other peaks (or other object groups) and decimate the signal to reduce the data size. Then perform super-resolution methods on this limited data size. The resulting distance estimations provide distance relative to the coarse estimation from the FFT processing.
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公开(公告)号：US09729968B2
公开(公告)日：2017-08-08
申请号：US14638974
申请日：2015-03-04
Applicant: Texas Instruments Incorporated
Inventor： Muhammad Zubair Ikram
CPC classification number: H04R3/02 , H04M3/00 , H04M3/002 , H04M9/082 , H04R2499/11
Abstract: A method and a system for echo cancellation. The method includes receiving incoming downlink signal sample, performing Kalman filter time update of linear filter, constructing data matrix for linear filter adaptation, performing Kalman filter measurements update on linear filter, performing Kalman filter time update on non-linear filter, constructing data matrix for non-linear filter adaptation, performing Kalman filter measurements update on non-linear filter, generating echo using adapted linear and non-linear filters, subtracting the echo from microphone signal to generate echo free uplink signal, and uplinking the echo free signal to the far-end.
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公开(公告)号：US20160291142A1
公开(公告)日：2016-10-06
申请号：US15089956
申请日：2016-04-04
Applicant: Texas Instruments Incorporated
Inventor： Adeel Ahmad , Dan Wang , Muhammad Zubair Ikram , Murtaza Ali
CPC classification number: G01S7/352 , G01S7/414 , G01S7/415 , G01S13/931 , G01S2007/356
Abstract: An FMCW radar is used to detect live objects by processing the matched, filtered radar return on a frame by frame basis. An FFT cross correlation coefficient is computed, followed by computing a modified geometric mean of the absolute value of the cross correlation coefficients. The modified geometric mean is then compared to a preset threshold to determine whether the object is moving or is stationary.
Abstract translation: FMCW雷达用于通过逐帧处理匹配的滤波雷达回波来检测实时物体。 计算FFT互相关系数，然后计算互相关系数绝对值的修正几何平均值。 然后将修改的几何平均值与预设阈值进行比较，以确定对象是移动还是静止。
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9.发明申请公开(公告)号：US20140146963A1
公开(公告)日：2014-05-29
申请号：US14091346
申请日：2013-11-27
Applicant: Texas Instruments Incorporated
Inventor： Muhammad Zubair Ikram
IPC: H04B3/23
Abstract: A method for acoustic echo cancellation in a communication device is provided that includes receiving a first near-end audio signal in the communication device, wherein the first near-end audio signal comprises acoustic echo of a far-end audio signal reproduced by the communication device, and performing echo cancellation on the first near-end audio signal to generate a second near-end audio signal with at least some of the acoustic echo removed, wherein the echo cancellation is performed responsive to presence or absence of double-talk (DT), and wherein a zero-crossing rate (ZCR) is used to detect the presence or absence of DT.
Abstract translation: 提供一种在通信设备中的声学回声消除的方法，包括：在所述通信设备中接收第一近端音频信号，其中所述第一近端音频信号包括由所述通信设备再现的远端音频信号的声学回声 并且对所述第一近端音频信号执行回波消除以产生除去了至少一些所述声学回声的第二近端音频信号，其中所述回声消除是响应于是否存在双方通话（DT）而被执行的， ，并且其中使用零交叉率（ZCR）来检测DT的存在或不存在。
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公开(公告)号：US10302741B2
公开(公告)日：2019-05-28
申请号：US15089956
申请日：2016-04-04
Applicant: Texas Instruments Incorporated
Inventor： Adeel Ahmad , Dan Wang , Muhammad Zubair Ikram , Murtaza Ali
Abstract: An FMCW radar is used to detect live objects by processing the matched, filtered radar return on a frame by frame basis. An FFT cross correlation coefficient is computed, followed by computing a modified geometric mean of the absolute value of the cross correlation coefficients. The modified geometric mean is then compared to a preset threshold to determine whether the object is moving or is stationary.
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