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    • 5. 发明授权
    • Method and system for estimating frequency offsets
    • 估计频率偏移的方法和系统
    • US07643602B2
    • 2010-01-05
    • US11239350
    • 2005-09-30
    • Timothy R. MillerJohn W. McCorkle
    • Timothy R. MillerJohn W. McCorkle
    • H03D3/24
    • H03D13/003H03L7/085
    • A method is provided for estimating a frequency offset value. This method includes: receiving a signal from the transmitting device at the receiving device, the received signal having a transmitter frequency (510); generating a local signal at the receiving device, the local signal having a starting frequency (520); comparing a received signal phase and a local signal phase to determine an adjusted error signal representing a phase difference between the received signal and the local signal (530); adjusting a current frequency of the local signal from the starting frequency to the transmitting frequency over a time period (540); integrating the adjusted error signal over the time period to generate an integrated error signal (550); and filtering the integrated error signal to generate a frequency difference estimate indicative of the frequency difference between the transmitter frequency and the starting frequency (560).
    • 提供了一种用于估计频率偏移值的方法。 该方法包括:在接收设备处从发送设备接收信号,所接收的信号具有发射机频率(510); 在所述接收设备处产生本地信号,所述本地信号具有起始频率(520); 比较接收的信号相位和本地信号相位,以确定表示接收信号和本地信号之间的相位差的经调整的误差信号(530); 在一段时间内将本地信号的当前频率从起始频率调整到发射频率(540); 在所述时间周期内积分所述经调整的误差信号以产生积分误差信号(550); 并且对积分误差信号进行滤波以产生指示发射机频率和起始频率之间的频率差的频率差估计(560)。
    • 9. 发明授权
    • System and method for using programmable frequency offsets in a data network
    • 在数据网络中使用可编程频率偏移的系统和方法
    • US07983371B2
    • 2011-07-19
    • US10998716
    • 2004-11-30
    • John W. McCorkleTimothy R. Miller
    • John W. McCorkleTimothy R. Miller
    • H04L7/00
    • H04L27/0014H03B21/00H03B2200/0078H04B1/7183H04L2007/047H04L2027/0016
    • A method is provided for offsetting a reference frequency of a quadrature reference clock signal. A quadrature reference clock (110) generates the quadrature reference clock signal at the reference frequency, while a quadrature variable offset clock (130) generates a quadrature clock signal at a base offset frequency based on a base offset value it receives from a control circuit (560). The base offset value can be determined in many ways, including reading it from a local memory (910) or receiving it from a remote device (1010). A polyphase mixer (140) performs a polyphase mixing operation between the quadrature reference clock signal and the offset clock signal to generate an agile clock signal having an agile clock frequency equal to the reference frequency plus the base offset frequency. If desired, the method can revise the offset frequency based on actual conditions and determine a corresponding revised offset value (920, 1020).
    • 提供了一种用于抵消正交参考时钟信号的参考频率的方法。 正交参考时钟(110)以参考频率产生正交参考时钟信号,而正交可变偏移时钟(130)基于从控制电路接收的基本偏移值以基本偏移频率产生正交时钟信号( 560)。 基本偏移值可以以许多方式确定,包括从本地存储器(910)读取或从远程设备(1010)接收基本偏移值。 多相混合器(140)在正交参考时钟信号和偏移时钟信号之间执行多相混合操作,以产生具有等于参考频率加上基极偏移频率的敏捷时钟频率的敏捷时钟信号。 如果需要,该方法可以根据实际条件修改偏移频率,并确定对应的修正偏移值(920,1020)。
    • 10. 发明授权
    • Method and system for controlling a notching mechanism
    • 控制开槽机构的方法和系统
    • US07502410B2
    • 2009-03-10
    • US11239133
    • 2005-09-30
    • John W. McCorkleTimothy R. Miller
    • John W. McCorkleTimothy R. Miller
    • H04B3/46H04B17/00H04Q1/20
    • H04B1/1036
    • A circuit (100) is provided for notching an incoming wireless signal. The circuit comprises: a notching mechanism (110) for receiving an incoming signal and generating a notched signal having reduced power at the notch frequency (320), the notch frequency being adjustable in response to a notching control signal; a signal parameter detector (165, 170, 175, 180, 185) for detecting a signal parameter of the notched signal (325); a controller (155) for receiving the signal parameter and for generating the notching control signal (315), the controller being configured to vary the signal parameter within a notching control signal range (340); and a memory (160) for storing the signal parameter and the notching control signal received from the controller in a notching database (330). The controller is configured to analyze the notching database to determine an optimal notching control signal to achieve a desired level of signal performance (345).
    • 提供电路(100)用于切入输入的无线信号。 所述电路包括:切口机构(110),用于接收输入信号并产生在所述陷波频率(320)具有降低功率的陷波信号,所述陷波频率可响应于开槽控制信号而被调节; 信号参数检测器(165,170,175,180,185),用于检测所述有缺口信号(325)的信号参数; 控制器(155),用于接收所述信号参数并用于产生所述开槽控制信号(315),所述控制器被配置为在所述开槽控制信号范围(340)内改变所述信号参数; 以及存储器(160),用于将从控制器接收的信号参数和开槽控制信号存储在开槽数据库(330)中。 控制器被配置为分析开槽数据库以确定最佳的陷波控制信号以实现期望的信号性能水平(345)。