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1. 发明授权

US08253611B2 Method for calibrating a pipelined continuous-time sigma delta modulator 有权
标题翻译：校准流水线连续时间Σ-Δ调制器的方法
公开(公告)号：US08253611B2
公开(公告)日：2012-08-28
申请号：US12899158
申请日：2010-10-06
申请人： Patrick Satarzadeh , Venkatesh Srinivasan , Charles Sestok
发明人： Patrick Satarzadeh , Venkatesh Srinivasan , Charles Sestok
IPC分类号： H03M1/10
CPC分类号： H03M3/464 , H03M3/38 , H03M3/382 , H03M3/458
摘要： Traditionally, pipelined continuous-time (CT) sigma-delta modulators (SDM) have been difficult to build due at least in part to the difficulties in calibrating the pipeline. Here, however, a pipelined CT SDM is provided that has an architecture that is conducing to being calibrated. Namely, the system includes a digital filter and other features that can be adjusted to account for input imbalance errors and well as quantization leakage noise.
摘要翻译：传统上，流水线连续时间（CT）Σ-Δ调制器（SDM）已经难以构建，至少部分是由于校准管道的困难。然而，这里提供了一种流水线CT SDM，其具有有助于被校准的架构。也就是说，该系统包括数字滤波器和其他可调整的特征，以解决输入不平衡误差以及量化泄漏噪声。

2. 发明申请

US20120212358A1 PIPELINED ADC INTER-STAGE ERROR CALIBRATION 有权
标题翻译：管道ADC内部错误校准
公开(公告)号：US20120212358A1
公开(公告)日：2012-08-23
申请号：US13032457
申请日：2011-02-22
申请人： Kun Shi , Charles Sestok , Patrick Satarzadeh , Arthur J. Redfern
发明人： Kun Shi , Charles Sestok , Patrick Satarzadeh , Arthur J. Redfern
IPC分类号： H03M1/06
CPC分类号： H03M1/1033 , H03M1/123 , H03M1/164
摘要： An analog-to-digital converter (ADC) is provided. The ADC includes a plurality of pipelined ADCs and an adjustment circuit. Each pipelined ADC is adapted to receive an analog input signal, has an adjustable transfer function, and includes a compensator. The adjustment circuit is coupled to each pipelined ADC to be able to adjust the transfer function for each pipelined ADC so as to generally eliminate an estimation ambiguity. Additionally, the adjustment circuit estimates an inter-stage error that includes at least one of an inter-stage gain error and a DAC gain error and adjusts the compensator for each pipelined ADC to compensate for the inter-stage error.
摘要翻译：提供了一个模拟 - 数字转换器（ADC）。 ADC包括多个流水线ADC和调整电路。每个流水线ADC适于接收模拟输入信号，具有可调节的传递函数，并且包括补偿器。调整电路耦合到每个流水线ADC，以便能够调整每个流水线ADC的传递函数，以便通常消除估计模糊度。此外，调节电路估计包括级间增益误差和DAC增益误差中的至少一个的级间误差，并且调整每个流水线ADC的补偿器以补偿级间误差。

3. 发明申请

US20050265490A1 Enhanced channel estimator, method of enhanced channel estimating and an OFDM receiver employing the same 有权
标题翻译：增强信道估计器，增强信道估计方法和采用该方法的OFDM接收机
公开(公告)号：US20050265490A1
公开(公告)日：2005-12-01
申请号：US11136121
申请日：2005-05-24
申请人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
发明人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
IPC分类号： H04L25/02 , H04L27/06 , H04L27/26
CPC分类号： H04L25/0232 , H04L25/0212 , H04L25/022 , H04L27/2647
摘要： The present invention provides an enhanced channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment, the enhanced channel estimator includes a time interpolation estimator configured to provide time-interpolation channel estimates having at least one image for a portion of carriers having the scattered pilot channel estimates. The enhanced channel estimator also includes a frequency interpolation estimator coupled to the time interpolation estimator and configured to provide frequency-interpolation channel estimates for each carrier based on image suppression through balanced-error filtering.
摘要翻译：本发明提供了一种与使用分散导频信道估计的正交频分复用（OFDM）接收机一起使用的增强信道估计器。在一个实施例中，增强信道估计器包括时间插值估计器，其被配置为提供对具有分散导频信道估计的载波的一部分具有至少一个图像的时间插值信道估计。增强信道估计器还包括耦合到时间插值估计器并被配置为基于通过平衡误差滤波的图像抑制来为每个载波提供频率插值信道估计的频率内插估计器。

4. 发明授权

US08750816B2 Method to determine RF circuit antenna impedance 有权
标题翻译：确定RF电路天线阻抗的方法
公开(公告)号：US08750816B2
公开(公告)日：2014-06-10
申请号：US13569921
申请日：2012-08-08
申请人： Charles Sestok , Kun Shi
发明人： Charles Sestok , Kun Shi
IPC分类号： H04B17/00
CPC分类号： H04B17/12
摘要： A process of estimating an admittance of an RF component using a ladder network with alternating series and parallel components by making three VSWR measurements and computing three admittance circle solutions in the complex admittance plane. The admittances circles are transformed through reference planes of the ladder network to obtain three RF component admittance circles, then estimating the RF component admittance using three nearest intersections of the three RF component admittance circles. Reference planes are defined immediately upstream and immediately downstream of each component of the ladder network. The transforms are performed using lumped parameter models of the series and parallel components of the ladder network.
摘要翻译：使用具有交替串联和并联组件的梯形网络来估计RF分量的导纳的过程，通过进行三个VSWR测量并在复导纳平面中计算三个导纳圆解。通过梯形网络的参考平面转换导纳圆以获得三个RF分量导纳圆，然后使用三个RF分量导纳圆的三个最近的交点来估计RF分量导纳。参考平面紧紧地定位在梯形网络的每个部件的上游和紧邻的下游。使用梯形网络的串联和并联组件的集总参数模型来执行变换。

5. 发明授权

US08451152B2 Pipelined ADC inter-stage error calibration 有权
标题翻译：流水线ADC级间误差校准
公开(公告)号：US08451152B2
公开(公告)日：2013-05-28
申请号：US13032457
申请日：2011-02-22
申请人： Kun Shi , Charles Sestok , Patrick Satarzadeh , Arthur J. Redfern
发明人： Kun Shi , Charles Sestok , Patrick Satarzadeh , Arthur J. Redfern
IPC分类号： H03M1/06
CPC分类号： H03M1/1033 , H03M1/123 , H03M1/164
摘要： An analog-to-digital converter (ADC) is provided. The ADC includes a plurality of pipelined ADCs and an adjustment circuit. Each pipelined ADC is adapted to receive an analog input signal, has an adjustable transfer function, and includes a compensator. The adjustment circuit is coupled to each pipelined ADC to be able to adjust the transfer function for each pipelined ADC so as to generally eliminate an estimation ambiguity. Additionally, the adjustment circuit estimates an inter-stage error that includes at least one of an inter-stage gain error and a DAC gain error and adjusts the compensator for each pipelined ADC to compensate for the inter-stage error.
摘要翻译：提供了一个模拟 - 数字转换器（ADC）。 ADC包括多个流水线ADC和调整电路。每个流水线ADC适于接收模拟输入信号，具有可调节的传递函数，并且包括补偿器。调整电路耦合到每个流水线ADC，以便能够调整每个流水线ADC的传递函数，以便通常消除估计模糊度。此外，调节电路估计包括级间增益误差和DAC增益误差中的至少一个的级间误差，并且调整每个流水线ADC的补偿器以补偿级间误差。

6. 发明申请

US20060222099A1 Channel length estimation and accurate FFT window placement for high-mobility OFDM receivers in single frequency networks 有权
标题翻译：信道长度估计和单频网络中高移动性OFDM接收机的精确FFT窗口布局
公开(公告)号：US20060222099A1
公开(公告)日：2006-10-05
申请号：US11389354
申请日：2006-03-23
申请人： Badri Varadarajan , Anand Dabak , Charles Sestok , Srinath Hosur
发明人： Badri Varadarajan , Anand Dabak , Charles Sestok , Srinath Hosur
IPC分类号： H04L27/06 , H04K1/10
CPC分类号： H04L25/0216 , H04L27/2662 , H04L2025/03414
摘要： A method of estimating a channel length (304) in a wireless receiver is disclosed. The receiver receives a signal (122) from a remote transmitter. The receiver selects a plurality (K) of different candidate channel lengths and determines a respective criterion value (402) of the signal for each of the plurality of different candidate channel lengths. The receiver selects a channel length (410) from the plurality of different candidate channel lengths in response to the respective criterion value (404).
摘要翻译：公开了一种在无线接收机中估计信道长度（304）的方法。接收机从远程发射机接收信号（122）。接收机选择不同候选信道长度的多个（K），并且为多个不同候选信道长度中的每一个确定信号的相应标准值（402）。接收机响应于各自的标准值（404）从多个不同候选信道长度中选择一个信道长度（410）。

7. 发明授权

US08374261B2 Method and apparatus for Doppler estimation in orthogonal frequency-division multiplexing (OFDM) 有权
标题翻译：正交频分复用（OFDM）中多普勒估计的方法和装置
公开(公告)号：US08374261B2
公开(公告)日：2013-02-12
申请号：US12512784
申请日：2009-07-30
申请人： Charles Sestok , Jaiganesh Balakrishnan
发明人： Charles Sestok , Jaiganesh Balakrishnan
IPC分类号： H04K1/10
CPC分类号： H04L27/2647 , H04L25/0204 , H04L25/0222 , H04L25/0228
摘要： A method and apparatus for estimating Doppler channel in an Orthogonal Frequency-Division Multiplexor. The method includes selecting a continuation pilot, generating a channel estimation, filtering the continual pilot with at least one channel estimator, computing the error between the channel estimation and the filtered channel estimates, averaging the error across continual pilot carriers and over time, estimating noise variance, corrects average error utilizing the estimated noise variance to generate an estimate of the overall channel estimator error, and setting the filter cutoff to minimum estimation error.
摘要翻译：用于估计正交频分多路复用器中的多普勒频道的方法和装置。该方法包括选择连续导频，产生信道估计，用至少一个信道估计器对连续导频进行滤波，计算信道估计与经滤波的信道估计之间的误差，对连续导频载波上的误差和时间进行平均，估计噪声使用估计的噪声方差校正平均误差，以产生总体信道估计误差的估计，并将滤波器截止值设置为最小估计误差。

8. 发明申请

US20120286981A1 COMPRESSIVE SENSING ANALOG-TO-DIGITAL CONVERTERS 有权
标题翻译：压缩感测模拟数字转换器
公开(公告)号：US20120286981A1
公开(公告)日：2012-11-15
申请号：US13106585
申请日：2011-05-12
申请人： Patrick Satarzadeh , Marco Corsi , Victoria Wang , Arthur J. Redfern , Fernando Mujica , Charles Sestok , Kun Shi , Venkatesh Srinivasan
发明人： Patrick Satarzadeh , Marco Corsi , Victoria Wang , Arthur J. Redfern , Fernando Mujica , Charles Sestok , Kun Shi , Venkatesh Srinivasan
IPC分类号： H03M1/66
CPC分类号： H03M1/1265
摘要： Compressive sensing is an emerging field that attempts to prevent the losses associated with data compression and improve efficiency overall, and compressive sensing looks to perform the compression before or during capture, before energy is wasted. Here, several analog-to-digital converter (ADC) architectures are provided to perform compressive sensing. Each of these new architectures selects resolutions for each sample substantially at random and adjusts the sampling rate as a function of these selected resolutions.
摘要翻译：压缩感测是一个新兴领域，它试图防止与数据压缩相关的损失，并提高整体效率，压缩感测在能量浪费之前，在捕获之前或捕获过程中会执行压缩。这里，提供了几个模数转换器（ADC）架构来执行压缩感测。这些新架构中的每一个基本上随机选择每个样本的分辨率，并根据这些选择的分辨率调整采样率。

9. 发明申请

US20120262319A1 METHOD FOR CALBRATING A PIPELINED CONTINUOUS-TIME SIGMA DELTA MODULATOR 审中-公开
公开(公告)号：US20120262319A1
公开(公告)日：2012-10-18
申请号：US13532436
申请日：2012-06-25
申请人： Patrick Satarzadeh , Venkatesh Srinivasan , Charles Sestok
发明人： Patrick Satarzadeh , Venkatesh Srinivasan , Charles Sestok
IPC分类号： H03M1/10 , H03M3/02
CPC分类号： H03M3/464 , H03M3/38 , H03M3/382 , H03M3/458
摘要： Traditionally, pipelined continuous-time (CT) sigma-delta modulators (SDM) have been difficult to build due at least in part to the difficulties in calibrating the pipeline. Here, however, a pipelined CT SDM is provided that has an architecture that is conducing to being calibrated. Namely, the system includes a digital filter and other features that can be adjusted to account for input imbalance errors and well as quantization leakage noise.

10. 发明申请

US20110026616A1 METHOD AND APPARATUS FOR DOPPLER ESTIMATION IN ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING (OFDM) 有权
标题翻译：正交频分复用（OFDM）中多普勒估计的方法与装置
公开(公告)号：US20110026616A1
公开(公告)日：2011-02-03
申请号：US12512784
申请日：2009-07-30
申请人： Charles Sestok , Jaiganesh Balakrishnan
发明人： Charles Sestok , Jaiganesh Balakrishnan
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L25/0204 , H04L25/0222 , H04L25/0228
摘要： A method and apparatus for estimating Doppler channel in an Orthogonal Frequency-Division Multiplexor. The method includes selecting a continuation pilot, generating a channel estimation, filtering the continual pilot with at least one channel estimator, computing the error between the channel estimation and the filtered channel estimates, averaging the error across continual pilot carriers and over time, estimating noise variance, corrects average error utilizing the estimated noise variance to generate an estimate of the overall channel estimator error, and setting the filter cutoff to minimum estimation error.
摘要翻译：用于估计正交频分多路复用器中的多普勒频道的方法和装置。该方法包括选择连续导频，产生信道估计，用至少一个信道估计器对连续导频进行滤波，计算信道估计与经滤波的信道估计之间的误差，对连续导频载波上的误差和时间进行平均，估计噪声使用估计的噪声方差校正平均误差，以产生总体信道估计误差的估计，并将滤波器截止值设置为最小估计误差。

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