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    • 95. 发明授权
    • Passive fourier transform circuits and butler matrices
    • 被动傅立叶变换电路和管家矩阵
    • US08497743B2
    • 2013-07-30
    • US11963884
    • 2007-12-24
    • Paul Wilkinson Dent
    • Paul Wilkinson Dent
    • H03H7/00H01P1/00
    • H04B1/0458H01Q3/40H01Q25/007
    • The coupling circuit described herein comprises passive analog components for coupling a transceiver to an antenna, such as an antenna array. The coupling circuit transforms an input signal into an appropriate format for each element of the antenna array. The coupling circuit comprises a coupling network having a plurality of inputs and a plurality of outputs. The inputs provide quadriphase versions of at least one input signal. In one embodiment, the coupling circuit performs a Discrete Fourier Transform (DFT) on the input signal. In another embodiment, the coupling circuit performs a Fast Fourier Transform (FFT) on the input signal. In still another embodiment, the FFT performed by the coupling circuit implements a Butler matrix.
    • 本文描述的耦合电路包括用于将收发器耦合到诸如天线阵列的天线的无源模拟组件。 耦合电路将输入信号转换为天线阵列的每个元件的适当格式。 耦合电路包括具有多个输入和多个输出的耦合网络。 输入提供至少一个输入信号的四阶段版本。 在一个实施例中,耦合电路对输入信号执行离散傅里叶变换(DFT)。 在另一个实施例中,耦合电路对输入信号执行快速傅里叶变换(FFT)。 在另一个实施例中,由耦合电路执行的FFT实现Butler矩阵。
    • 96. 发明授权
    • Mobile radio channel estimation
    • 移动无线电信道估计
    • US08379782B2
    • 2013-02-19
    • US12478473
    • 2009-06-04
    • Paul Wilkinson DentLeonid Krasny
    • Paul Wilkinson DentLeonid Krasny
    • H04B1/10
    • H04L25/0202
    • The described method characterizes scattering objects in a wireless channel. The present invention determines non-equally spaced path delays and Doppler parameters for a plurality of scattering objects in a wireless channel. More particularly, a frequency-to-time transform applied to a plurality of OFDM pilot samples received over a plurality of OFDM symbol periods generates a set of non-equally spaced path delays and a set of associated complex delay coefficients. Further, a time-to-frequency transform applied to the complex delay coefficients determined for one path delay over multiple OFDM symbol periods generates a set of Doppler parameters comprising a plurality of non-equally spaced Doppler frequencies and their corresponding scattering coefficients for that path delay.
    • 所描述的方法表征无线信道中的散射物体。 本发明为无线信道中的多个散射物体确定不等间距的路径延迟和多普勒参数。 更具体地,应用于在多个OFDM符号周期中接收的多个OFDM导频样本的频率 - 时间变换产生一组不等间距的路径延迟和一组相关联的复延迟系数。 此外,应用于针对多个OFDM符号周期上的一个路径延迟确定的复数延迟系数的时间 - 频率变换产生一组多普勒参数,其包括多个非等距多普勒频率及其对于该路径延迟的相应散射系数 。
    • 97. 发明授权
    • Memory compression
    • 内存压缩
    • US08316068B2
    • 2012-11-20
    • US11143157
    • 2005-06-02
    • Paul Wilkinson Dent
    • Paul Wilkinson Dent
    • G06F15/00G06F1/02
    • A63F13/95A63F13/08A63F2300/206H03M7/30
    • Exemplary embodiments of the present invention comprise a method for compressing data for storage in memory. According to one embodiment, the method forms a set of values based on a monotonically ordered series of look-up table values. For one or more paired values in the set, the exemplary method generates a difference of the values in the pair. After replacing one of the values in the pair with a value based on the differences to modify the set, the exemplary method stores final values based on the modified set in memory. The present invention also comprises memory for storing the look-up table values. One exemplary memory comprises a decoder, an encoder, and one or more patterns of crisscrossed interconnect lines that interconnect the encoder with the decoder. The patterns of crisscrossed interconnection lines may be implemented on one or more planar layers of conductor tracks vertically interleaved with isolating material.
    • 本发明的示例性实施例包括一种用于压缩数据以存储在存储器中的方法。 根据一个实施例,该方法基于单调有序的查询表值序列形成一组值。 对于集合中的一个或多个配对值,示例性方法生成该对中的值的差异。 在使用基于差异的值替换该对中的一个值以修改该集合之后,该示例性方法将基于修改的集合的最终值存储在存储器中。 本发明还包括用于存储查找表值的存储器。 一个示例性存储器包括解码器,编码器以及将编码器与解码器互连的交叉互连线的一个或多个图案。 交叉互连线的图案可以在与绝缘材料垂直交错的导体轨迹的一个或多个平面层上实现。
    • 98. 发明授权
    • Continuous sequential scatterer estimation
    • 连续顺序散射体估计
    • US08116710B2
    • 2012-02-14
    • US12478520
    • 2009-06-04
    • Paul Wilkinson DentLeonid Krasny
    • Paul Wilkinson DentLeonid Krasny
    • H04B17/00
    • H04L25/022H04L25/0222H04L25/0236H04L25/0248H04L25/03101
    • The present invention uses newly received signal samples to update previously determined scatterer parameters, and therefore, reduces the processing effort required for characterizing scattering objects in a wireless channel. Broadly, the present invention determines a first set of scatterer parameters based on signal samples derived from signals received during one or more previous time intervals, and determines an updated set of scatterer parameters for a subsequent time interval based on the first set of scatterer parameters and the new signal samples. In one exemplary embodiment, the receiver uses a continuous sequential update process, e.g., a per-symbol-period inverse Prony process, to update the scatterer parameters. In another exemplar embodiment, the receiver uses an integrated Doppler approach to update the scatterer parameters.
    • 本发明使用新接收的信号样本来更新先前确定的散射体参数,因此减少了在无线信道中表征散射物体所需的处理努力。 广义上,本发明基于从在一个或多个先前时间间隔期间接收的信号导出的信号样本来确定第一组散射体参数,并且基于第一组散射体参数确定用于随后时间间隔的更新的散射体参数集合,以及 新的信号样本。 在一个示例性实施例中,接收机使用连续的顺序更新过程,例如每符号周期逆Prony过程来更新散射体参数。 在另一示例性实施例中,接收机使用综合多普勒方法来更新散射体参数。
    • 99. 发明授权
    • Methods and apparatus for suppressing strong-signal interference in low-IF receivers
    • 抑制低中频接收机强信号干扰的方法和装置
    • US08055234B2
    • 2011-11-08
    • US12147962
    • 2008-06-27
    • Sven MattissonPaul Wilkinson Dent
    • Sven MattissonPaul Wilkinson Dent
    • H04B1/16
    • H04B1/109H04B1/30
    • Circuits and methods are disclosed for compensating for received signal distortion caused by non-linearities in the receiver circuitry. An exemplary receiver circuit includes a distortion waveform generator configured to approximate one or more non-linear response characteristics of a downconverter circuit used to downconvert the received radio frequency signal. The estimated distortion waveform thus produced is filtered, using a filter or filters substantially similar to those used for filtering an intermediate frequency signal that includes the desired signal and non-linear distortion products caused by strong interfering signals. The filtered estimated distortion waveform and the intermediate frequency are sampled, to obtain a sampled distortion signal and a sampled signal of interest. The sampled distortion signal is scaled, and subtracted from the sampled signal of interest to obtain reduced-interference signal samples. In some embodiments, the scaling factor is determined by correlating the sampled signal of interest with the sampled distortion signal.
    • 公开了用于补偿由接收机电路中的非线性引起的接收信号失真的电路和方法。 示例性接收器电路包括失真波形发生器,其被配置为近似用于下变频接收的射频信号的下变频器电路的一个或多个非线性响应特性。 使用与用于滤波包括由强干扰信号引起的期望信号和非线性失真产物的中频信号基本相似的滤波器或滤波器来滤波所产生的估计失真波形。 对经滤波的估计失真波形和中频进行采样,以获得采样的失真信号和感兴趣的采样信号。 采样的失真信号被缩放,并从感兴趣的采样信号中减去以获得减小干扰的信号样本。 在一些实施例中,通过将感兴趣的采样信号与采样的失真信号相关来确定缩放因子。
    • 100. 发明授权
    • Own transmitter interference tolerant transceiver and receiving methods
    • 自己的发射机干扰收发和收发方式
    • US07995973B2
    • 2011-08-09
    • US12339726
    • 2008-12-19
    • Paul Wilkinson DentSven Mattisson
    • Paul Wilkinson DentSven Mattisson
    • H04B1/40
    • H04B1/525
    • Circuits and methods are disclosed for reducing interference from transmitter leakage in a radio transceiver. An exemplary method for reducing interference from transmitter leakage in a radio transceiver comprises downconverting, filtering, and sampling a radio frequency signal comprising a desired signal and a transmitter leakage signal to obtain a sampled signal of interest. The method further comprises generating a sampled distortion signal estimate that estimates one or more distortion products of the transmitter leakage signal, such as a squared amplitude obtained from a square-law device or corresponding digital function. Further, the method comprises dividing the sampled distortion signal estimate and the sampled signal of interest into a plurality of frequency channels. Finally, for a selected number of frequency channels, the method comprises combining the sampled distortion signal estimate for a frequency channel with the corresponding sampled signal of interest for the same frequency channel to obtain interference-reduced signal samples for the frequency channel.
    • 公开了用于减少无线电收发器中发射机泄漏的干扰的电路和方法。 用于减少无线电收发机中的发射机泄漏的干扰的示例性方法包括对包括期望信号和发射机泄漏信号的射频信号进行下变频,滤波和采样,以获得感兴趣的采样信号。 该方法还包括生成估计发射机泄漏信号的一个或多个失真产物的采样失真信号估计,例如从平方律装置获得的平方振幅或相应的数字功能。 此外,该方法包括将采样的失真信号估计和所获取的采样信号分成多个频率信道。 最后,对于选定数量的频道,该方法包括将用于频率信道的采样失真信号估计与相同频率信道的对应采样信号组合,以获得用于频率信道的干扰减小信号样本。