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1.发明申请CONTINUOUS TRACKING OF MISMATCH CORRECTION IN BOTH ANALOG AND DIGITAL DOMAINS IN AN INTERLEAVED ADC 有权连续跟踪在交互式ADC中的两个模拟和数字域中的错误纠正公开(公告)号：US20170041011A1
公开(公告)日：2017-02-09
申请号：US15230643
申请日：2016-08-08
CPC分类号： H03M1/0624 , H03M1/0626 , H03M1/1009 , H03M1/1215
摘要： A system. The system includes a first tracking filter configured to track a frequency domain mismatch profile between component analog-to-digital convertors (ADCs) of an interleaved ADC (IADC), and a second tracking filter configured to a track a frequency independent timing delay mismatch and a timing delay mismatch correction error based on frequency domain mismatch profile estimates. An output of the first tracking filter determines a correction of a frequency dependent mismatch profile in an output of the interleaved ADC and an output of the second tracking filter determines a correction of the timing delay mismatch correction error in the output of the interleaved ADC.
摘要翻译： 一个系统。 该系统包括：第一跟踪滤波器，被配置为跟踪交织ADC（IADC）的分量模数转换器（ADC）之间的频域失配曲线;以及第二跟踪滤波器，其被配置为跟踪频率无关的定时延迟失配， 基于频域不匹配曲线估计的定时延迟失配校正误差。 第一跟踪滤波器的输出确定交错ADC的输出中的与频率相关的不匹配曲线的校正，并且第二跟踪滤波器的输出确定交错ADC的输出中的定时延迟失配校正误差的校正。
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公开(公告)号：US20200322067A1
公开(公告)日：2020-10-08
申请号：US16907051
申请日：2020-06-19
发明人： Sarma Sundareswara GUNTURI , Chandrasekhar SRIRAM , Jawaharlal TANGUDU , Sashidharan VENKATRAMAN
摘要： A channel response generating module and method for generating a channel response based on a ratio of a channel response corresponding to an image signal frequency bin in relation to a channel response corresponding to a traffic signal frequency bin, or a channel response corresponding to a first frequency bin in relation to a channel response corresponding to a second frequency bin, and a zero-IF signal transmitter employing the channel response generating module and method to efficiently suppress image signals or compensate traffic signals during transmission of IQ RF signals.
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3.发明申请公开(公告)号：US20200169434A1
公开(公告)日：2020-05-28
申请号：US16684842
申请日：2019-11-15
发明人： Jawaharlal TANGUDU , Sashidharan VENKATRAMAN , Sarma Sundareswara GUNTURI , Chandrasekhar SRIRAM , Sthanunathan RAMAKRISHNAN , Ram Narayan KRISHNA NAMA MONY
摘要： A channel estimation method and system for IQ imbalance and local oscillator leakage correction, wherein an example of a channel estimation system comprising a calibrating signal generator configured to generate at least one pair of calibrating signals, a feedback IQ mismatch estimator configured to measure feedback IQ mismatch estimates based on the pair of calibrating signals, and a calibrating signal based channel estimator configured to generate a channel estimate based on the pair of calibrating signals and the feedback IQ mismatch estimates.
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公开(公告)号：US20200177417A1
公开(公告)日：2020-06-04
申请号：US16695586
申请日：2019-11-26
发明人： Jawaharlal TANGUDU , Sashidharan VENKATRAMAN , Sundarrajan RANGACHARI , Sarma Sundareswara GUNTURI , Sthanunathan RAMAKRISHNAN
摘要： An electrical system includes a transceiver with an IQ estimator and an IQ mismatch corrector. The electrical system also includes an antenna coupled to the transceiver. The IQ estimator is configured to perform frequency-domain IQ mismatch analysis to determine an IQ mismatch estimate at available frequency bins of a baseband data signal. The IQ mismatch corrector is configured to correct the baseband data signal based on the IQ mismatch estimate.
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公开(公告)号：US20200169342A1
公开(公告)日：2020-05-28
申请号：US16593401
申请日：2019-10-04
发明人： Sashidharan VENKATRAMAN , Jawaharlal TANGUDU , Sarma Sundareswara GUNTURI , Yeswanth GUNTUPALLI
IPC分类号： H04B17/364
摘要： A phase spectrum based delay estimating method of tracking channel responses, extracting phase responses from the tracked channel responses, and generating a delay estimate, wherein the delay estimate is based on a slope and intercept estimates of the extracted phase responses with high quality metric to improve delay estimation, and a system thereof.
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公开(公告)号：US20200153516A1
公开(公告)日：2020-05-14
申请号：US16661628
申请日：2019-10-23
发明人： Sarma Sundareswara GUNTURI , Chandrasekhar SRIRAM , Jawaharlal TANGUDU , Sashidharan VENKATRAMAN
摘要： A channel response generating module and method for generating a channel response based on a ratio of a channel response corresponding to an image signal frequency bin in relation to a channel response corresponding to a traffic signal frequency bin, or a channel response corresponding to a first frequency bin in relation to a channel response corresponding to a second frequency bin, and a zero-IF signal transmitter employing the channel response generating module and method to efficiently suppress image signals or compensate traffic signals during transmission of IQ RF signals.
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公开(公告)号：US20180175873A1
公开(公告)日：2018-06-21
申请号：US15791538
申请日：2017-10-24
发明人： Sthanunathan RAMAKRISHNAN , Sashidharan VENKATRAMAN , Chandrasekhar SRIRAM , Jawaharlal TANGUDU
CPC分类号： H03M1/08 , H03M1/1009 , H03M1/1042 , H03M1/1215
摘要： An integrated circuit chip includes an interleaved analog-to-digital converter (ADC) and an interleaving calibration circuit. The interleaved ADC includes a plurality of ADCs that are each configured to sample an analog signal. The interleaved ADC is configured to convert the analog signal into an interleaved analog-to-digital signal (IADC signal) that includes a plurality of spurious signals formed from mismatches between the plurality of ADCs. The interleaving calibration circuit is configured to receive the IADC signal from the interleaved ADC, generate a mismatch profile estimate corresponding to the plurality of spurious signals to generate one or more mismatch profile estimates, determine whether a first mismatch profile estimate is in a frequency band of interest, and, in response to a determination that the first mismatch profile estimate is in the frequency band of interest, generate a set of model parameters based on the first mismatch profile estimate.
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