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    PHASE TRACKING IN FREQUENCY DOMAIN IN A WIRELESS COMMUNICATION SYSTEM
    3.
    发明申请
    PHASE TRACKING IN FREQUENCY DOMAIN IN A WIRELESS COMMUNICATION SYSTEM 失效
    无线通信系统中频域中的相位跟踪

    公开(公告)号：US20100260233A1

    公开(公告)日：2010-10-14

    申请号：US12423363

    申请日：2009-04-14

    申请人： Le Nguyen Luong ,  Shrenik Patel ,  Stefan Franz

    发明人： Le Nguyen Luong ,  Shrenik Patel ,  Stefan Franz

    IPC分类号： H04B1/713 ,  H04L27/00

    CPC分类号： H04L27/0014 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2675 ,  H04L2027/003 ,  H04L2027/0059 ,  H04L2027/0067 ,  H04L2027/0069

    摘要： Techniques for correcting sampling frequency offset (SFO) and carrier frequency offset (CFO) in a wireless communication system are disclosed. An apparatus for correcting SFO and CFO may include a pilot tone extractor for extracting a plurality of pilot tones from one or more first symbols, a demodulator, an error signal generator, a loop filter, an angle generator, and a device for applying a correction phase to one or more symbols subsequent to the one or more first symbols. The demodulator is configured to demodulate the pilot tones. The error signal generator is configured to generate an error signal by summing and calculating the arctangent of the plurality of demodulated pilot tones. The loop filter is configured to generate an estimated phase rotation due to a residual CFO and the angle generator is configured to generate a correction phase for the plurality of tones.

    摘要翻译： 公开了用于在无线通信系统中校正采样频率偏移（SFO）和载波频率偏移（CFO）的技术。 用于校正SFO和CFO的装置可以包括用于从一个或多个第一符号提取多个导频音调的导频音提取器，解调器，误差信号发生器，环路滤波器，角度发生器和用于应用校正的装置 相位到一个或多个第一符号之后的一个或多个符号。 解调器被配置为解调导频音调。 误差信号发生器被配置为通过求和并计算多个解调导频音的反正切来产生误差信号。 环路滤波器被配置为由于残余CFO而产生估计的相位旋转，并且角度发生器被配置为产生用于多个音调的校正相位。

    Interference detection apparatus and method
    4.
    发明授权
    Interference detection apparatus and method 失效
    干扰检测装置及方法

    公开(公告)号：US08744336B2

    公开(公告)日：2014-06-03

    申请号：US12199113

    申请日：2008-08-27

    申请人： Shrenik Patel ,  Prasad Gudem ,  Saraswathi Palakurty

    发明人： Shrenik Patel ,  Prasad Gudem ,  Saraswathi Palakurty

    IPC分类号： H04K3/00

    CPC分类号： H04K3/82 ,  H04B1/1027 ,  H04B1/109

    摘要： Techniques for detecting jammers in a received signal are described. A jammer detector includes a jammer filter for attenuating transmit signals leaked into the receive path, a pulse generator for converting the interference signals into discrete-level pulses, and a pulse processor for determining the presence of jammers in the discrete-level pulses. In an exemplary embodiment, the pulse processor is configured to further discriminate among close-in jammers that are close to the desired receive frequency, far-away jammers, and jammers arising from the transmit signals leaked into the receive path. In another exemplary embodiment, hysteresis is provided in the pulse generator to enable the generation of reliable pulses. Further aspects include configuring the jammer detector for operation in a plurality of frequency bands and/or according to a plurality of communications standards.

    摘要翻译： 描述用于检测接收信号中的干扰的技术。 干扰检测器包括用于衰减泄漏到接收路径中的发射信号的干扰滤波器，用于将干扰信号转换成离散电平脉冲的脉冲发生器，以及用于确定离散电平脉冲中干扰的存在的脉冲处理器。 在示例性实施例中，脉冲处理器被配置为进一步区分接近期望接收频率的接近干扰信号，远距离干扰信号以及从泄漏到接收路径中的发射信号产生的干扰。 在另一个示例性实施例中，在脉冲发生器中提供迟滞以使能产生可靠的脉冲。 另外的方面包括将干扰检测器配置为在多个频带中操作和/或根据多个通信标准。

    Phase tracking in frequency domain in a wireless communication system
    5.
    发明授权
    Phase tracking in frequency domain in a wireless communication system 失效
    无线通信系统中频域的相位跟踪

    公开(公告)号：US08265181B2

    公开(公告)日：2012-09-11

    申请号：US12423363

    申请日：2009-04-14

    申请人： Le Nguyen Luong ,  Shrenik Patel ,  Stefan Franz

    发明人： Le Nguyen Luong ,  Shrenik Patel ,  Stefan Franz

    IPC分类号： H04L27/28

    CPC分类号： H04L27/0014 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2675 ,  H04L2027/003 ,  H04L2027/0059 ,  H04L2027/0067 ,  H04L2027/0069

    摘要： Techniques for correcting sampling frequency offset (SFO) and carrier frequency offset (CFO) in a wireless communication system are disclosed. An apparatus for correcting SFO and CFO may include a pilot tone extractor for extracting a plurality of pilot tones from one or more first symbols, a demodulator, an error signal generator, a loop filter, an angle generator, and a device for applying a correction phase to one or more symbols subsequent to the one or more first symbols. The demodulator is configured to demodulate the pilot tones. The error signal generator is configured to generate an error signal by summing and calculating the arctangent of the plurality of demodulated pilot tones. The loop filter is configured to generate an estimated phase rotation due to a residual CFO and the angle generator is configured to generate a correction phase for the plurality of tones.

    摘要翻译： 公开了用于在无线通信系统中校正采样频率偏移（SFO）和载波频率偏移（CFO）的技术。 用于校正SFO和CFO的装置可以包括用于从一个或多个第一符号提取多个导频音调的导频音提取器，解调器，误差信号发生器，环路滤波器，角度发生器和用于应用校正的装置 相位到一个或多个第一符号之后的一个或多个符号。 解调器被配置为解调导频音调。 误差信号发生器被配置为通过求和并计算多个解调导频音的反正切来产生误差信号。 环路滤波器被配置为由于残余CFO而产生估计的相位旋转，并且角度发生器被配置为产生用于多个音调的校正相位。

    INTERFERENCE DETECTION APPARATUS AND METHOD
    6.
    发明申请
    INTERFERENCE DETECTION APPARATUS AND METHOD 失效
    干扰检测装置和方法

    公开(公告)号：US20100052968A1

    公开(公告)日：2010-03-04

    申请号：US12199113

    申请日：2008-08-27

    申请人： Shrenik Patel ,  Prasad Gudem ,  Saraswathi Palakurty

    发明人： Shrenik Patel ,  Prasad Gudem ,  Saraswathi Palakurty

    IPC分类号： G01S7/38

    CPC分类号： H04K3/82 ,  H04B1/1027 ,  H04B1/109

    摘要： Techniques for detecting jammers in a received signal are described. A jammer detector includes a jammer filter for attenuating transmit signals leaked into the receive path, a pulse generator for converting the interference signals into discrete-level pulses, and a pulse processor for determining the presence of jammers in the discrete-level pulses. In an exemplary embodiment, the pulse processor is configured to further discriminate among close-in jammers that are close to the desired receive frequency, far-away jammers, and jammers arising from the transmit signals leaked into the receive path. In another exemplary embodiment, hysteresis is provided in the pulse generator to enable the generation of reliable pulses. Further aspects include configuring the jammer detector for operation in a plurality of frequency bands and/or according to a plurality of communications standards.

    摘要翻译： 描述用于检测接收信号中的干扰的技术。 干扰检测器包括用于衰减泄漏到接收路径中的发射信号的干扰滤波器，用于将干扰信号转换成离散电平脉冲的脉冲发生器，以及用于确定离散电平脉冲中干扰的存在的脉冲处理器。 在示例性实施例中，脉冲处理器被配置为进一步区分接近期望接收频率的接近干扰信号，远距离干扰信号和从泄漏到接收路径中的发射信号产生的干扰。 在另一个示例性实施例中，在脉冲发生器中提供迟滞以使能产生可靠的脉冲。 另外的方面包括将干扰检测器配置为在多个频带中操作和/或根据多个通信标准。