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    Reconfigurable wideband channelized receiver
    4.
    发明授权
    Reconfigurable wideband channelized receiver 有权
    可重构宽带信道化接收机

    公开(公告)号：US09197283B1

    公开(公告)日：2015-11-24

    申请号：US14576039

    申请日：2014-12-18

    申请人： RAYTHEON COMPANY

    发明人： Tuan V. Nguyen ,  Oleg Brovko ,  Alison Kim ,  Jing Z. Stafsudd

    IPC分类号： H04B1/00 ,  H04B1/707 ,  H04B1/16

    CPC分类号： H03M1/121 ,  H03M1/04 ,  H03M1/128 ,  H04B1/16 ,  H04B1/70712

    摘要： A method and apparatus for sampling a high bandwidth analog signal includes: splitting the high bandwidth analog signal into N parallel channels; randomly demodulating each of the signals; sampling each demodulated signal using a sub-Nyquist sampling rate; combining each sampled signal into a sub-Nyquist signal; compressive sensing the combined sub-Nyquist signal to estimate missing samples of a full Nyquist rate uniform sample set X(n); convolving X(n) with N analysis filters, each analysis filter having a different coefficient; decimating output of each analysis filter using decimation ratios of M:1 to generate a sub-banded signal set Yi (n), i=1, . . . , N; processing the sub-banded signal set; up-sampling each processed sub-band signal by M; convolving each up-sampled sub-band signal with a corresponding synthesis filter; and combining two or more of the convolved signals to generate a non-uniform spectral partitioning of the high bandwidth analog signal.

    摘要翻译： 一种用于对高带宽模拟信号进行采样的方法和装置包括：将高带宽模拟信号分成N个并行信道; 随机解调每个信号; 使用子奈奎斯特采样率对每个解调信号进行采样; 将每个采样信号组合成次奈奎斯特信号; 压缩感测组合的次奈奎斯特信号以估计全奈奎斯特速率均匀样本集X（n）的丢失样本; 用N个分析滤波器卷积X（n），每个分析滤波器具有不同的系数; 使用M：1的抽取比例抽取每个分析滤波器的输出，以产生子带式信号集合Yi（n），i = 1。 。 。 ，N; 处理子带信号集; 将每个处理的子带信号上采样M; 将每个上采样子带信号与对应的合成滤波器进行卷积; 并组合两个或更多个卷积信号以产生高带宽模拟信号的不均匀频谱划分。

    Accurate reconstruction of frequency-sparse signals with arbitrary frequencies from non-uniform samples
    5.
    发明授权
    Accurate reconstruction of frequency-sparse signals with arbitrary frequencies from non-uniform samples 有权
    从非均匀样本中任意频率的频率稀疏信号的精确重建

    公开(公告)号：US09064136B1

    公开(公告)日：2015-06-23

    申请号：US13749610

    申请日：2013-01-24

    申请人： HRL Laboratories, LLC

    发明人： Kang-Yu Ni ,  Cathy (Xiangming) Kong ,  Roy M. Matic ,  Mohiuddin Ahmed

    IPC分类号： G06G7/16 ,  G06G7/32 ,  G06G7/122 ,  G06G7/161

    CPC分类号： G06G7/161 ,  G06G7/122 ,  H03M1/04 ,  H03M1/128 ,  H03M7/3062

    摘要： Described is a method for accurately reconstructing analog signals. The present invention considers a general parameter estimation problem, extends the utility of compressive sensing to real scenarios, and is able to accurately estimate center frequencies and amplitudes. Specifically, an unknown continuous analog signal comprising a set of arbitrary frequencies and amplitudes is received. A set of non-uniform samples of the unknown continuous analog signal is then obtained at multiple times. Finally, an iterative reconstruction process is utilized to determine a set of frequencies and a set of amplitudes that best fit the set of non-uniform samples in a global minimum problem in order to accurately reconstruct the continuous analog signal.

    摘要翻译： 描述了一种用于精确重建模拟信号的方法。 本发明考虑了一般的参数估计问题，将压缩感知的效用扩展到实际场景，并且能够准确估计中心频率和振幅。 具体地，接收包括一组任意频率和幅度的未知连续模拟信号。 然后可以多次获得未知连续模拟信号的一组不均匀采样。 最后，迭代重建过程用于确定一组频率和一组最佳拟合全局最小问题中的非均匀样本的幅度，以便精确地重构连续的模拟信号。

    Successive approximation analog-to-digital converter (ADC) with dynamic search algorithm
    6.
    发明授权
    Successive approximation analog-to-digital converter (ADC) with dynamic search algorithm 有权
    具有动态搜索算法的逐次逼近模数转换器（ADC）

    公开(公告)号：US09124294B2

    公开(公告)日：2015-09-01

    申请号：US14558004

    申请日：2014-12-02

    申请人： MaxLinear, Inc.

    发明人： Raja Pullela ,  Curtis Ling

    IPC分类号： H03M1/00 ,  H03M1/46 ,  H03M1/04 ,  H03M1/44

    CPC分类号： H03M1/38 ,  H03M1/002 ,  H03M1/04 ,  H03M1/44 ,  H03M1/46 ,  H03M1/462

    摘要： Aspects of a method and system for a successive approximation analog-to-digital converter with dynamic search algorithms are provided. In some embodiments, a successive approximation analog-to-digital converter includes a digital-to-analog converter, a comparator, and a search and decode logice modules which cooperate to generate a digital output code representative of the analog input voltage based on a dynamic search algorithm. The dynamic search algorithms may alter a sequence of reference voltages used to successively approximate the analog input voltage based on one or more characteristics of the analog input voltage.

    摘要翻译： 提供了具有动态搜索算法的逐次逼近模数转换器的方法和系统的方面。 在一些实施例中，逐次逼近模数转换器包括数模转换器，比较器以及搜索和解码逻辑模块，其协作以基于动态的方式产生代表模拟输入电压的数字输出代码 搜索算法。 动态搜索算法可以基于模拟输入电压的一个或多个特性改变用于连续逼近模拟输入电压的参考电压序列。

    SUCCESSIVE APPROXIMATION ANALOG-TO-DIGITAL CONVERTER (ADC) WITH DYNAMIC SEARCH ALGORITHM
    7.
    发明申请
    SUCCESSIVE APPROXIMATION ANALOG-TO-DIGITAL CONVERTER (ADC) WITH DYNAMIC SEARCH ALGORITHM 有权
    具有动态搜索算法的连续逼近模数转换器（ADC）

    公开(公告)号：US20140300499A1

    公开(公告)日：2014-10-09

    申请号：US14248851

    申请日：2014-04-09

    申请人： MaxLinear, Inc.

    发明人： Raja Pullela ,  Curtis Ling

    IPC分类号： H03M1/38

    CPC分类号： H03M1/38 ,  H03M1/002 ,  H03M1/04 ,  H03M1/44 ,  H03M1/46 ,  H03M1/462

    摘要： Aspects of a method and system for a successive approximation analog-to-digital converter with dynamic search algorithms are provided. In some embodiments, a successive approximation analog-to-digital converter includes a digital-to-analog converter, a comparator, and a search and decode logice modules which cooperate to generate a digital output code representative of the analog input voltage based on a dynamic search algorithm. The dynamic search algorithms may alter a sequence of reference voltages used to successively approximate the analog input voltage based on one or more characteristics of the analog input voltage.

    摘要翻译： 提供了具有动态搜索算法的逐次逼近模数转换器的方法和系统的方面。 在一些实施例中，逐次逼近模数转换器包括数模转换器，比较器以及搜索和解码逻辑模块，其协作以基于动态的方式产生代表模拟输入电压的数字输出代码 搜索算法。 动态搜索算法可以基于模拟输入电压的一个或多个特性改变用于连续逼近模拟输入电压的参考电压序列。

    Systems and methods for designing ADC based on probabilistic switching of memories
    8.
    发明授权
    Systems and methods for designing ADC based on probabilistic switching of memories 有权
    基于存储器概率切换设计ADC的系统和方法

    公开(公告)号：US08525709B2

    公开(公告)日：2013-09-03

    申请号：US13238053

    申请日：2011-09-21

    申请人： Subramaniam Venkatraman ,  Jeffrey Alexander Levin

    发明人： Subramaniam Venkatraman ,  Jeffrey Alexander Levin

    IPC分类号： H03M1/56 ,  H03M1/04

    CPC分类号： H03M1/04 ,  H03M1/56

    摘要： Certain aspects of the present disclosure provide a probabilistic analog to digital converter (ADC). The probabilistic ADC may be configured to convert an analog input to a variable-length or variable-amplitude pulse, apply the pulse to a plurality of memory elements as a switching pulse, and determine a digital value based on a number of memory elements that store a value after the switching pulse is applied.

    摘要翻译： 本公开的某些方面提供概率模数转换器（ADC）。 概率ADC可以被配置为将模拟输入转换为可变长度或可变幅度脉冲，将脉冲施加到多个存储器元件作为切换脉冲，并且基于存储的存储器元件的数量来确定数字值 施加开关脉冲后的值。

    Method and apparatus for analyzing an analog-to-digital converter with a nonideal digital-to-analog converter
    9.
    发明授权
    Method and apparatus for analyzing an analog-to-digital converter with a nonideal digital-to-analog converter 失效
    用于使用非理想数模转换器分析模数转换器的方法和装置

    公开(公告)号：US4583075A

    公开(公告)日：1986-04-15

    申请号：US539359

    申请日：1983-10-06

    申请人： Edwin A. Sloane

    发明人： Edwin A. Sloane

    IPC分类号： G01R31/28 ,  G06G7/19 ,  H03M1/00 ,  H03K13/00

    CPC分类号： G06G7/19 ,  G01R31/28 ,  H03M1/04 ,  H03M1/1071

    摘要： A method for statistically calibrating an analog-to-digital converter with an electronic test system. A digital-to-analog converter which has been calibrated by premeasured weighting coefficients with respect to two-state orthogonal signals is excited with two state signals at each input bit which together represent a single signal with uniform amplitude probability with respect to time, and wherein each excitation signal is orthogonal with respect to all other excitation signals. The output of the digital-to-analog converter is detected by the analog-to-digital converter under test. The digital time domain output signals are then mapped into a transform domain to obtain weighting coefficients of each bit of the output response. Finally the transform domain weighting coefficients are weighted by the reciprocal of the premeasured weighting coefficients to obtain the unbiased weight of each bit of the analog-to-digital converter under test. A preferred set of excitation signals is a set of Walsh function signals representing the digital equivalent of a linear ramp function.

    摘要翻译： 一种用电子测试系统对模数转换器进行统计校准的方法。 已经通过相对于两状态正交信号的预先测量的加权系数校准的数模转换器被激励，每个输入位处的两个状态信号一起表示相对于时间具有均匀振幅概率的单个信号，并且其中 每个激励信号相对于所有其它激励信号是正交的。 数模转换器的输出由被测数字转换器检测。 然后将数字时域输出信号映射到变换域中，以获得输出响应的每个位的加权系数。 最后，通过预先测量的加权系数的倒数对变换域加权系数进行加权，以获得待测模拟数字转换器的每个位的无偏置权重。 优选的一组激励信号是表示线性斜坡函数的数字等价物的沃尔什函数信号的集合。

    Method of and system for generating digital test signals
    10.
    发明授权
    Method of and system for generating digital test signals 失效
    产生数字测试信号的方法和系统

    公开(公告)号：US4161627A

    公开(公告)日：1979-07-17

    申请号：US865501

    申请日：1977-12-29

    申请人： Bertram Amann

    发明人： Bertram Amann

    IPC分类号： G06F1/03 ,  H03M1/00 ,  H03M7/50 ,  H04B14/04 ,  H04J3/14 ,  H04L3/00

    CPC分类号： H04B14/04 ,  G06F1/03 ,  G06F1/0321 ,  H03M1/1019 ,  H03M7/50 ,  G06F2101/16 ,  H03M1/04 ,  H03M1/1071

    摘要： To test the performance of a PCM terminal operating in the TDM mode, a simulated message or noise signal is generated by extracting a recurrent sequence of code words from a read-only memory, the stored code words representing a set of values logarithmically related to sucdessive amplitudes of a sine wave or other periodic oscillation to be reproduced. These words are read out at a fixed scanning frequency f.sub.o but with skipping of (p-l) memory stages if a signal frequency pf.sub.o is to be simulated. A volume selector generates supplemental code words which are additively or subtractively combined with the extracted code words to simulate a desired voltage level. The resulting code words are compressed in a code converter in which the quantum steps of the segments of a compander characteristic, conforming to the chosen logarithmic function, are stored in another read-only memory.

    摘要翻译： 为了测试在TDM模式下工作的PCM终端的性能，通过从只读存储器提取码字的循环序列来生成模拟消息或噪声信号，存储的代码字表示与成功对数相关的一组值 要再现正弦波或其他周期振荡的振幅。 这些字以固定的扫描频率fo读出，但是如果要模拟信号频率pfo，则跳过（p-1）个存储器级。 音量选择器产生与所提取的码字相加或减去组合的模拟所需电压电平的补码码字。 所得到的代码字在代码转换器中被压缩，其中符合所选择的对数函数的压缩扩展器特征的段的量子步长被存储在另一个只读存储器中。