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121 条记录 (耗时 0.039 秒)

    High dynamic range closed loop automatic gain control circuit
    91.
    发明授权
    High dynamic range closed loop automatic gain control circuit 失效
    高动态范围闭环自动增益控制电路

    公开(公告)号：US5283536A

    公开(公告)日：1994-02-01

    申请号：US48559

    申请日：1993-04-16

    申请人： Charles E. Wheatley, III ,  Derek N. Punch

    发明人： Charles E. Wheatley, III ,  Derek N. Punch

    IPC分类号： H03G3/20 ,  H03G3/30

    CPC分类号： H03G3/3042 ,  H03G3/3078

    摘要： A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit is coupled to the amplifier means for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit is included for receiving the measurement signal, and a reference signal which corresponds to a desired signal power of the output signal. The integration circuit integrates with respect to time the difference between the measurement signal and the reference signal, and generates the control signal which corresponds to the result of the integration.

    摘要翻译： 具有高动态范围能力的闭环自动增益控制（AGC）电路具有放大器电路，用于接收容易受到信号功率变化的输入信号和控制信号的影响。 放大器电路响应于控制信号，以与控制信号相对应的增益电平放大输入信号，从而提供相应的输出信号。 测量电路耦合到放大器装置，用于测量放大的输入信号的对数信号功率并提供相应的线性测量信号。 包括用于接收测量信号的积分电路和对应于输出信号的期望信号功率的参考信号。 积分电路相对于测量信号和参考信号之间的差异而积分，并且产生对应于积分结果的控制信号。

    Estimation of thermal noise and rise-over-thermal in a wireless communication system
    94.
    发明授权
    Estimation of thermal noise and rise-over-thermal in a wireless communication system 有权
    无线通信系统中热噪声和上升热的估计

    公开(公告)号：US08254279B2

    公开(公告)日：2012-08-28

    申请号：US12107013

    申请日：2008-04-21

    申请人： Charles E. Wheatley, III ,  Avneesh Agrawal ,  Danlu Zhang ,  Sharad Deepak Sambhwani ,  Lu Yuan ,  Mehraban Iraninejad

    发明人： Charles E. Wheatley, III ,  Avneesh Agrawal ,  Danlu Zhang ,  Sharad Deepak Sambhwani ,  Lu Yuan ,  Mehraban Iraninejad

    IPC分类号： H04J3/14 ,  H04W4/00

    CPC分类号： H04B17/382 ,  H04B17/345

    摘要： Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. In an aspect, thermal noise in a sideband may be measured and used to estimate thermal noise in a signal band. In one design, received power in the sideband may be measured, e.g., by computing total power of FFT transform coefficients within the sideband. Thermal noise may be estimated based on (e.g., by filtering) the measured received power in the sideband. Received power in the signal band may also be measured. Total received power may be estimated based on (e.g., by filtering) the measured received power in the signal band. RoT may then be estimated based on the estimated thermal noise and the estimated total received power. The estimated RoT may be used to estimate an available load for a cell, which may be used to admit and/or schedule users in the cell.

    摘要翻译： 描述了用于估计通信系统中的热噪声和上升热（RoT）的技术。 在一方面，边带中的热噪声可以被测量并用于估计信号频带中的热噪声。 在一种设计中，边带中的接收功率可以例如通过计算边带内的FFT变换系数的总功率来测量。 可以基于（例如，通过滤波）边带中的测量的接收功率来估计热噪声。 也可以测量信号频带中的接收功率。 可以基于（例如，通过滤波）在信号频带中测量的接收功率来估计总接收功率。 然后可以基于估计的热噪声和估计的总接收功率来估计RoT。 估计的RoT可以用于估计小区的可用负载，其可以用于接纳和/或调度小区中的用户。

    WIRELESS POWER DISTRIBUTION AMONG A PLURALITY OF RECEIVERS
    96.
    发明申请
    WIRELESS POWER DISTRIBUTION AMONG A PLURALITY OF RECEIVERS 有权
    无线电接收机的功率分配

    公开(公告)号：US20110260682A1

    公开(公告)日：2011-10-27

    申请号：US12951269

    申请日：2010-11-22

    申请人： Zhen Ning Low ,  Charles E. Wheatley, III ,  William H. Von Novak

    发明人： Zhen Ning Low ,  Charles E. Wheatley, III ,  William H. Von Novak

    IPC分类号： H02J7/00

    CPC分类号： H03H7/40 ,  H02J5/005 ,  H02J7/0027 ,  H02J7/025 ,  H02J50/12 ,  H02J50/20 ,  H02J50/90 ,  H04B5/0037 ,  H04B5/0081

    摘要： Exemplary embodiments are directed to power distribution among a plurality of receivers. A method may include requesting at least one receiver of a plurality of receivers within a charging region of a transmitter to modify an associated load resistance to achieve a desired power distribution among the plurality of receivers. The method may further include requesting each receiver of the plurality of receivers to modify an associated load resistance to achieve a desired total impedance as seen by the transmitter while maintaining the desired power distribution among the plurality of receivers.

    摘要翻译： 示例性实施例涉及多个接收器之间的功率分配。 方法可以包括请求发射机的充电区域内的多个接收机的至少一个接收机来修改相关联的负载电阻以在多个接收机之间实现期望的功率分配。 该方法还可以包括请求多个接收机中的每个接收机修改相关联的负载电阻以实现由发射机看到的期望的总阻抗，同时保持多个接收机之间的所需功率分配。