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    Spread spectrum base station
    6.
    发明申请
    Spread spectrum base station 审中-公开
    扩频基站

    公开(公告)号：US20050169350A1

    公开(公告)日：2005-08-04

    申请号：US11091061

    申请日：2005-03-28

    申请人： Donald Schilling ,  Joseph Garodnick ,  Gary Lomp ,  Timothy Moore

    发明人： Donald Schilling ,  Joseph Garodnick ,  Gary Lomp ,  Timothy Moore

    IPC分类号： H04B1/707 ,  H04B1/7075 ,  H04B7/005

    CPC分类号： H04W52/221 ,  H04B1/707 ,  H04B1/7075 ,  H04W52/225 ,  H04W52/228 ,  H04W52/52

    摘要： A spread spectrum base station comprises an automatic gain control (AGC) circuit having an input configured to receive a received spread spectrum signal and gain control the received spread spectrum signal to produce a gain controlled signal. A correlation circuit has an input configured to receive the gain controlled signal and correlate the gain controlled signal with a code to produce a despread signal. A power measurement and comparator circuit is configured to receive the despread signal and a control level of the AGC circuit. The circuit processes at least the despread signal and the control level to produce a processed signal and compares the processed signal with a threshold to produce a comparison signal. The comparison signal is used to produce a power command. A multiplexer multiplexes the power command with a signal for transmission over an antenna.

    摘要翻译： 扩展频谱基站包括自动增益控制（AGC）电路，其具有被配置为接收接收的扩频信号的输入，并且对接收到的扩频信号进行增益控制以产生增益受控信号。 相关电路具有被配置为接收增益受控信号并将增益受控信号与代码相关以将其产生解扩信号的输入。 功率测量和比较器电路被配置为接收解扩信号和AGC电路的控制电平。 电路至少处理去扩展信号和控制电平以产生处理的信号，并将处理的信号与阈值进行比较以产生比较信号。 比较信号用于产生功率指令。 多路复用器将功率命令与通过天线传输的信号进行复用。

    Transmission channel impulse response estimation using fast algorithms
    10.
    发明授权
    Transmission channel impulse response estimation using fast algorithms 有权
    使用快速算法的传输信道脉冲响应估计

    公开(公告)号：US07406120B1

    公开(公告)日：2008-07-29

    申请号：US11096418

    申请日：2005-04-01

    申请人： Barnet M. Schmidt ,  Gary Lomp ,  Charles R. Giardina

    发明人： Barnet M. Schmidt ,  Gary Lomp ,  Charles R. Giardina

    IPC分类号： H03H7/30

    CPC分类号： H04L25/0212 ,  H04K1/00 ,  H04L25/0228 ,  H04L25/0244

    摘要： Channel impulse response estimation employs a training sequence to enable correction for multipath and other disturbances affecting a signal during transmission via a digital wireless communication channel. High-speed packet transmission rates, with a training sequence for each packet, are made possible by training sequence construction enabling fast algorithm processing of received signals for impulse response estimation. Upon reception, a Toeplitz-type mathematical representation is constructed based on transmitted and received versions of a training sequence. The Toeplitz-type representation may then be processed by application of fast algorithms, such as Levinson-type algorithms, to determine coefficients representative of the communication channel impulse response. These coefficients, applied to an adaptive equalizer type of filter, enable correction for signal disturbances incurred in transmission. Channel impulse response estimation methods and systems are described.

    摘要翻译： 信道脉冲响应估计采用训练序列，以便能够经由数字无线通信信道在传输期间对多路径和其他干扰影响信号进行校正。 通过训练序列构建使具有每个分组的训练序列的高速分组传输速率成为可能，使得能够快速地对接收到的信号进行处理，以进行脉冲响应估计。 在接收时，基于训练序列的发送和接收版本构建Toeplitz型数学表示。 然后可以通过应用诸如Levinson型算法的快速算法来处理Toeplitz型表示，以确定表示通信信道脉冲响应的系数。 应用于自适应均衡器类型的滤波器的这些系数使得能够对发射中引起的信号干扰进行校正。 描述信道脉冲响应估计方法和系统。