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    System and method for channelization and data multiplexing in a wireless communication network
    2.
    发明申请
    System and method for channelization and data multiplexing in a wireless communication network 审中-公开
    用于无线通信网络中的信道化和数据复用的系统和方法

    公开(公告)号：US20050180375A1

    公开(公告)日：2005-08-18

    申请号：US11032402

    申请日：2005-01-10

    申请人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand Dabak ,  Nathan Belk ,  Danielle Griffith

    发明人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand Dabak ,  Nathan Belk ,  Danielle Griffith

    IPC分类号： H04B1/69 ,  H04J11/00 ,  H04J13/00 ,  H04B7/208

    CPC分类号： H04B1/71632 ,  H04J13/0022

    摘要： A system and method for channelization and data multiplexing in ultra-wideband (UWB) wireless communication system is described. The spectrum allocated for UWB in a multi-band OFDM (orthogonal frequency division multiplex) system is subdivided into various bands. A set of time frequency codes (TFC's) is defined, wherein each code specifies one of a plurality of unique band versus time sequences for a particular band group, for sequential data symbols of a given piconet. The separation of data words from multiple devices or multiple simultaneously operating piconets (SOP's) is provided by a combination of FDMA and TFC's. The combination of FDMA and TFC's provides a simplified interface between the MAC and PHY.

    摘要翻译： 描述了在超宽带（UWB）无线通信系统中的信道化和数据复用的系统和方法。 在多频带OFDM（正交频分复用）系统中为UWB分配的频谱被细分成各种频带。 定义一组时间频率码（TFC），其中每个码指定给定微微网的顺序数据符号的特定频带组的多个唯一频带对时间序列中的一个。 数据字从多个设备或多个同时操作的微微网（SOP）的分离由FDMA和TFC的组合提供。 FDMA和TFC的组合提供了MAC和PHY之间的简化接口。

    Method and apparatus for suppressing local oscillator leakage in a wireless transmitter
    4.
    发明授权
    Method and apparatus for suppressing local oscillator leakage in a wireless transmitter 有权
    用于抑制无线发射机中本地振荡器泄漏的方法和装置

    公开(公告)号：US07206557B2

    公开(公告)日：2007-04-17

    申请号：US10338198

    申请日：2003-01-08

    申请人： Turgut Sefket Aytur ,  Nathan Belk

    发明人： Turgut Sefket Aytur ,  Nathan Belk

    IPC分类号： H04B1/04

    CPC分类号： H04B1/0475

    摘要： A direct conversion transmitter comprising two local oscillators, an in-phase and quadrature modulating signal and in-phase and quadrature modulators, adds a leakage detector and corrective algorithm with one or more digital to analog converters to generate a corrective signal. The corrective signal corrects for, minimizes, and suppresses local oscillator carrier leakage into the transmitted signal. In accordance with the invention, direct up transmitter carrier leakage is automatically measured at regular intervals during the transmit cycle. A DC correction, or a correction waveform as a function of time, is input to both the “in-phase” and “quadrature” modulators at the baseband input. The two correction signals are tuned according to a minimization algorithm to achieve the lowest possible carrier component in the spectral output of the transmitter at its ambient operating conditions and present power output level. As the ambient conditions, such as temperature, and transmitter power level changes, the two correcting input DC currents, or correction waveforms, are further tuned towards the optimal values for that operating condition. Optimization is accomplished by an adaptive feedback technique employed to achieve maximum carrier suppression.

    摘要翻译： 包括两个本地振荡器（同相和正交调制信号以及同相和正交调制器）的直接转换发射器将一个泄漏检测器和校正算法与一个或多个数模转换器相加，以产生校正信号。 校正信号校正，最小化和抑制本地振荡器载波泄漏到发射信号中。 根据本发明，在发射周期期间，以规则的间隔自动测量直流发射机载波泄漏。 作为时间的函数的DC校正或校正波形被输入到基带输入处的“同相”和“正交”调制器两者。 根据最小化算法来调整两个校正信号，以在其环境操作条件下实现发射机的频谱输出中最低可能的载波分量，并且提供功率输出电平。 随着诸如温度和发射机功率电平变化的环境条件，两个校正输入DC电流或校正波形进一步被调整到该操作条件的最佳值。 通过用于实现最大载波抑制的自适应反馈技术来实现优化。

    Bi-modal RF architecture for low power devices
    5.
    发明申请
    Bi-modal RF architecture for low power devices 有权
    低功率器件的双模RF架构

    公开(公告)号：US20070026839A1

    公开(公告)日：2007-02-01

    申请号：US11191721

    申请日：2005-07-28

    申请人： Jie Liang ,  Nathan Belk

    发明人： Jie Liang ,  Nathan Belk

    IPC分类号： H04B1/16

    CPC分类号： H04W52/0229 ,  Y02D70/142

    摘要： A wireless receiver is provided that includes a component and a power control logic 80. The component is operable to receive a wireless signal and process the wireless signal in at least one of a first mode and a second mode. The first mode uses less power than the second mode. The power control logic 80 is operable based on a characteristic of the wireless signal to promote processing the wireless signal by the component in the at least one of the first and second modes. A method for a wireless receiver to process the wireless signal to reduce power consumption is also provided. The method includes determining a characteristic of the wireless signal, and selecting one of a first and second modes in which to process the signal based on the characteristic of the wireless signal.

    摘要翻译： 提供了包括组件和功率控制逻辑80的无线接收器。该组件可操作以接收无线信号并且以第一模式和第二模式中的至少一个处理无线信号。 第一模式比第二模式使用更少的功率。 功率控制逻辑80可基于无线信号的特性来操作，以促进处理第一和第二模式中的至少一个中的组件的无线信号。 还提供了一种用于无线接收机处理无线信号以降低功耗的方法。 该方法包括确定无线信号的特性，并且基于无线信号的特性来选择处理信号的第一和第二模式之一。

    Integrated channel filter and method of operation
    6.
    发明申请
    Integrated channel filter and method of operation 有权
    集成通道滤波器和操作方法

    公开(公告)号：US20050088254A1

    公开(公告)日：2005-04-28

    申请号：US10694074

    申请日：2003-10-27

    申请人： Nathan Belk

    发明人： Nathan Belk

    IPC分类号： H03J1/00 ,  H03J5/24 ,  H03H7/12

    CPC分类号： H03J5/244 ,  H03J1/0008

    摘要： A system includes a filter and a tuner formed on an integrated circuit. The filter receives an input signal comprising a first number of channels and communicates an intermediate output signal comprising a second number of channels less than the first number of channels. The tuner is coupled to the filter and receives the intermediate output signal and communicates an output signal comprising a third number of channels less than the second number of channels.

    摘要翻译： 一种系统包括形成在集成电路上的滤波器和调谐器。 滤波器接收包括第一数量信道的输入信号，并传送包括小于第一数量信道的第二数量信道的中间输出信号。 调谐器耦合到滤波器并接收中间输出信号并传送包括小于第二数量通道的第三数量通道的输出信号。