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    Hardware based compressive sampling ADC architecture for non-uniform sampled signal recovery
    2.
    发明授权
    Hardware based compressive sampling ADC architecture for non-uniform sampled signal recovery 有权
    基于硬件的压缩采样ADC架构，用于非均匀采样信号恢复

    公开(公告)号：US09450597B1

    公开(公告)日：2016-09-20

    申请号：US14702294

    申请日：2015-05-01

    申请人： HRL LABORATORIES, LLC

    发明人： Mohiuddin Ahmed ,  Shankar R. Rao ,  Willie W. Ng

    IPC分类号： H03M1/12 ,  G02F7/00 ,  H03M1/06

    CPC分类号： G02F7/00 ,  G02F1/065 ,  H03M1/0629 ,  H03M1/123 ,  H03M1/1245 ,  H03M1/128

    摘要： A back end-circuit for randomized non uniform and alias-free subsampling, comprising: an analog-to-digital converter (ADC) configured for sampling an input signal at random non uniform times; a compressive sensing processor, coupled to the ADC, to recover a sparse spectral representation of the input signal; and a Fourier transformer for converting the sparse spectral representation to a time sampled representation of the input signal.

    摘要翻译： 一种用于随机非均匀和无别名的次采样的后端电路，包括：模数转换器（ADC），被配置为在随机的非均匀时间对输入信号进行采样; 耦合到ADC的压缩感测处理器，以恢复输入信号的稀疏频谱表示; 以及用于将稀疏频谱表示转换为输入信号的时间采样表示的傅里叶变换器。

    Direct digital RF conversion
    3.
    发明授权
    Direct digital RF conversion 有权
    直接数字射频转换

    公开(公告)号：US09191043B1

    公开(公告)日：2015-11-17

    申请号：US14074582

    申请日：2013-11-07

    申请人： HRL Laboratories, LLC

    发明人： Deying Zhang ,  Mohiuddin Ahmed

    IPC分类号： H03H9/46 ,  H04B1/10

    CPC分类号： H03H17/0273

    摘要： A digital filter bank includes a first sample and hold unit, one or more second sample and hold units one or more quantizers and one or more polyphase component filters. In another aspect, a digital filter bank includes a first sample and hold unit, a discrete time commutator and one or more polyphase component filters. In another aspect, a method for digitally filtering a signal includes sampling an input signal at a first frequency, sampling and holding the first sampled signal at a second frequency, quantizing the one or more second sampled signals to output channelized signals, and filtering the one or more quantized signals and outputting one or more filtered signals using one or more polyphase component filters.

    摘要翻译： 数字滤波器组包括第一采样和保持单元，一个或多个第二采样和保持单元一个或多个量化器和一个或多个多相分量滤波器。 在另一方面，数字滤波器组包括第一采样和保持单元，离散时间换向器和一个或多个多相分量滤波器。 在另一方面，一种用于对信号进行数字滤波的方法包括以第一频率对输入信号进行采样，以第二频率采样和保持第一采样信号，量化一个或多个第二采样信号以输出信道化信号， 或更多的量化信号，并使用一个或多个多相分量滤波器输出一个或多个滤波信号。

    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。