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18 条记录 (耗时 0.02 秒)

    Slot-to-interlace and interlace-to-slot converters for an OFDM system
    1.
    发明申请
    Slot-to-interlace and interlace-to-slot converters for an OFDM system 失效
    用于OFDM系统的时隙到交织和交织到时隙转换器

    公开(公告)号：US20060002362A1

    公开(公告)日：2006-01-05

    申请号：US11133089

    申请日：2005-05-18

    申请人： Jai Subrahmanyam ,  Kevin Cousineau ,  Michael Wang

    发明人： Jai Subrahmanyam ,  Kevin Cousineau ,  Michael Wang

    IPC分类号： H04J3/00

    CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2602

    摘要： In an OFDM system, multiple (M) interlaces are defined for M non-overlapping sets of frequency subbands, and M slots with fixed indices are also defined. Data streams and pilot are mapped to slots, which are in turn mapped to interlaces based on a slot-to-interlace mapping scheme that can achieve frequency diversity and good performance for all slots. At a transmitter, a slot-to-interlace converter maps the slots to the interlaces. The slot-to-interlace converter includes multiple multiplexers and a control unit. The multiplexers map the M slots to the M interlaces based on the slot-to-interlace mapping scheme. The control unit generates at least one control signal for the multiplexers. The multiplexers may be arranged and controlled in various manners depending on the slot-to-interlace mapping scheme. At a receiver, a complementary interlace-to-slot converter maps the interlaces to the slots.

    摘要翻译： 在OFDM系统中，为M个非重叠的频率子带组定义多个（M）交织，并且还定义具有固定索引的M个时隙。 数据流和导频被映射到时隙，这些时隙又被映射到基于可以实现所有时隙的频率分集和良好性能的时隙到交织映射方案的交错。 在发射机处，时隙到隔行转换器将时隙映射到交织。 时隙到隔行转换器包括多个多路复用器和一个控制单元。 多路复用器基于时隙到交错映射方案将M个时隙映射到M个交织。 控制单元为多路复用器生成至少一个控制信号。 可以根据时隙到交错映射方案以多种方式来布置和控制多路复用器。 在接收机处，互补的交错到时隙转换器将交织器映射到时隙。

    Fast fourier transform twiddle multiplication
    2.
    发明申请
    Fast fourier transform twiddle multiplication 失效
    快速傅立叶变换旋转乘法

    公开(公告)号：US20060248135A1

    公开(公告)日：2006-11-02

    申请号：US11373433

    申请日：2006-03-10

    申请人： Kevin Cousineau ,  Raghuraman Krishnamoorthi

    发明人： Kevin Cousineau ,  Raghuraman Krishnamoorthi

    IPC分类号： G06F17/14

    CPC分类号： H04L5/0064 ,  G06F17/142 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0083 ,  H04L25/022 ,  H04L25/0226 ,  H04L27/265 ,  H04L27/2656

    摘要： An FFT engine implementing a cycle count method of applying twiddle multiplications in multi-stages. When implementing a multistage FFT, the intermediate values need to be multiplied by various twiddle factors. The FFT engine utilizes a minimal number of multipliers to perform the twiddle multiplications in an efficient pipeline. Optimizing a number of complex multipliers based on an FFT radix and a number of values in each row of memory allows the FFT function to be performed using a reasonable amount of area and in a minimal number of cycles. Strategic ordering and grouping of the values allows the FFT operation to be performed in a fewer number of cycles.

    摘要翻译： 实现循环计数法的FFT引擎，用于多阶段应用旋转乘法。 当实现多级FFT时，中间值需要乘以各种旋转因子。 FFT引擎利用最少数量的乘法器在有效的管道中执行旋转乘法。 基于每一行存储器中的FFT基数和多个值来优化多个复数乘法器允许使用合理的面积和最小数量的周期来执行FFT功能。 这些值的策略排序和分组允许以更少的周期执行FFT运算。

    Channel estimate optimization for multiple transmit modes
    4.
    发明申请
    Channel estimate optimization for multiple transmit modes 审中-公开
    多种传输模式的信道估计优化

    公开(公告)号：US20060203710A1

    公开(公告)日：2006-09-14

    申请号：US11366779

    申请日：2006-03-01

    申请人： Krishna Mukkavilli ,  Kevin Cousineau ,  Seong Chung

    发明人： Krishna Mukkavilli ,  Kevin Cousineau ,  Seong Chung

    IPC分类号： H04J11/00

    CPC分类号： H04L25/0232 ,  H04L25/0212 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/025 ,  H04L27/2647

    摘要： Channel estimation in a spectrally shaped wireless communication system in which an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation. A channel impulse response estimate is obtained by performing an IFFT on a frequency response estimate. The number of taps in the channel impulse response can be truncated to a predetermined number of taps determined based on an operating mode of the second set of P uniformly spaced subbands. The energy of each tap value remaining after truncation can be compared to a predetermined threshold and modified based on the results of the comparison. The predetermined threshold can be determined based on an operating mode. A final frequency response estimate for each mode within each OFDM symbol is derived.

    摘要翻译： 在频谱形状的无线通信系统中的信道估计，其中基于在用于导频传输的第二组子带上接收的导频符号获得针对第一组P均匀间隔子带（1）的初始频率响应估计，以及（2）使用 外插和/或插值。 通过对频率响应估计执行IFFT来获得信道脉冲响应估计。 可以将信道脉冲响应中的抽头数量截断为基于第二组P均匀间隔子带的操作模式确定的预定数量的抽头。 截断后剩余的每个抽头值的能量可以与预定阈值进行比较，并根据比较结果进行修改。 可以基于操作模式来确定预定阈值。 导出每个OFDM符号内每个模式的最终频率响应估计。

    Method to Prevent Over Torque of Yaw Drive Components in a Wind Turbine
    8.
    发明申请
    Method to Prevent Over Torque of Yaw Drive Components in a Wind Turbine 审中-公开
    在风力发电机中防止绕组驱动部件过转矩的方法

    公开(公告)号：US20130088009A1

    公开(公告)日：2013-04-11

    申请号：US13487726

    申请日：2012-06-04

    申请人： Kevin Cousineau ,  Ehren Van Schmus ,  Marty Gardner

    发明人： Kevin Cousineau ,  Ehren Van Schmus ,  Marty Gardner

    IPC分类号： H02P9/04

    CPC分类号： F03D7/0204 ,  F05B2270/1095 ,  F05B2270/329 ,  F05B2270/602 ,  Y02E10/723

    摘要： A method for preventing over torque and failure of yaw system components in a wind turbine is disclosed. The method may include providing a yaw system having a yaw drive including a drive motor for facing a nacelle positioned on the yaw system in a preferred wind direction. The method may also include preventing operation of the drive motor beyond a normal operating region on a torque-speed curve of the drive motor to avoid torques that may damage the yaw system components.

    摘要翻译： 公开了一种用于防止风力涡轮机中的偏转系统部件的过扭矩和失效的方法。 该方法可以包括提供具有偏航驱动器的偏航系统，所述偏航驱动器包括用于面向位于优选风向上的偏航系统上的机舱的驱动马达。 该方法还可以包括防止驱动电动机超出驱动电动机的转矩 - 转速曲线上的正常操作区域的操作，以避免可能损坏偏航系统部件的转矩。

    Signal-producing mechanism
    9.
    发明授权
    Signal-producing mechanism 有权
    信号产生机制

    公开(公告)号：US08289724B2

    公开(公告)日：2012-10-16

    申请号：US12185711

    申请日：2008-08-04

    申请人： Michael G. Matthews ,  Kevin Cousineau ,  Scott C. Asbill

    发明人： Michael G. Matthews ,  Kevin Cousineau ,  Scott C. Asbill

    IPC分类号： H05K1/18

    CPC分类号： G06F3/0338 ,  H04N2005/4417

    摘要： The present invention provides devices for controlling a desired output of an output device. These devices include a first conductor, a second conductor having a varying, predetermined spacing from the first conductor, and a third conductor positioned on the actuator mechanism and having a plurality of interconnecting positions between the first conductor and the second conductor. A predetermined one of a plurality of output signals may be produced when the third conductor connects the first conductor and the second conductor to control the desired output of the output device.

    摘要翻译： 本发明提供了用于控制输出装置的期望输出的装置。 这些装置包括第一导体，具有与第一导体变化的预定间隔的第二导体和位于致动器机构上的第三导体，并且在第一导体和第二导体之间具有多个互连位置。 当第三导体连接第一导体和第二导体以控制输出装置的期望输出时，可以产生多个输出信号中的预定的一个。

    Control systems
    10.
    发明授权
    Control systems 有权
    控制系统

    公开(公告)号：US07440290B2

    公开(公告)日：2008-10-21

    申请号：US10848024

    申请日：2004-05-17

    申请人： Michael G. Matthews ,  Kevin Cousineau ,  Scott C. Asbill

    发明人： Michael G. Matthews ,  Kevin Cousineau ,  Scott C. Asbill

    IPC分类号： H05K1/18

    CPC分类号： G06F3/0338 ,  H04N2005/4417

    摘要： The present invention provides systems, devices and methods for controlling a desired output of an output device. These systems, devices and methods include connecting an electrical resistance element having a selected one of a plurality of resistance values with an electrical circuit portion having a plurality of electrical components, determining an electrical characteristic associated with the connected electrical circuit portion and the variable resistance element, and generating a control signal based on the electrical characteristic to control the desired output of the output device.

    摘要翻译： 本发明提供了用于控制输出设备的期望输出的系统，设备和方法。 这些系统，装置和方法包括将具有多个电阻值中的一个选择的电阻元件与具有多个电气部件的电路部分连接，确定与连接的电路部分和可变电阻元件相关联的电特性 ，并且基于电特性产生控制信号以控制输出设备的期望输出。