利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

51 条记录 (耗时 0.026 秒)

    Techniques for improving channel estimation and tracking in a wireless communication system
    1.
    发明授权
    Techniques for improving channel estimation and tracking in a wireless communication system 有权
    在无线通信系统中改善信道估计和跟踪的技术

    公开(公告)号：US09137055B2

    公开(公告)日：2015-09-15

    申请号：US13567997

    申请日：2012-08-06

    申请人： Ning Chen ,  Ahsan U. Aziz ,  Leo G. Dehner ,  Taeyoon Kim

    发明人： Ning Chen ,  Ahsan U. Aziz ,  Leo G. Dehner ,  Taeyoon Kim

    IPC分类号： H04B1/10 ,  H04L25/02 ,  H04L5/00 ,  H04W28/04

    CPC分类号： H04L5/0053 ,  H04L25/0204 ,  H04L25/0236 ,  H04W28/04 ,  H04W56/0055

    摘要： A technique for performing channel tracking and/or channel estimation in a wireless communication device includes receiving a reference signal and one or more non-error propagation physical channel signals. In general, the one or more non-error propagation physical channel signals must be correctly decoded before a data channel can be decoded. Channel tracking and/or channel estimation are/is then performed based on the reference signal and at least one of the one or more non-error propagation physical channel signals.

    摘要翻译： 用于在无线通信设备中执行信道跟踪和/或信道估计的技术包括接收参考信号和一个或多个非错误传播物理信道信号。 一般来说，一个或多个非错误传播物理信道信号必须在数据信道可被解码之前被正确解码。 然后基于参考信号和一个或多个非错误传播物理信道信号中的至少一个执行信道跟踪和/或信道估计。

    METHOD OF PROVIDING A DATA SIGNAL FOR CHANNEL ESTIMATION AND CIRCUIT THEREOF
    2.
    发明申请
    METHOD OF PROVIDING A DATA SIGNAL FOR CHANNEL ESTIMATION AND CIRCUIT THEREOF 有权
    提供用于信道估计的数据信号的方法及其电路

    公开(公告)号：US20080304605A1

    公开(公告)日：2008-12-11

    申请号：US12183762

    申请日：2008-07-31

    申请人： Ahsan U. Aziz ,  Leo G. Dehner

    发明人： Ahsan U. Aziz ,  Leo G. Dehner

    IPC分类号： H04L1/02

    CPC分类号： H04L25/0232 ,  H04L25/0216 ,  H04L27/2605 ,  H04L27/2647

    摘要： A received signal having pilots is converted to a first signal in the frequency domain having the pilots. The pilots are extracted from the first signal to obtain extracted pilots to form a second signal. The second signal is used to provide a first estimate of a channel. The first estimate is converted to the time domain. Noise is removed from the first estimate in the time domain to provide a second estimate of the channel in the time domain. An autocorrelation of the channel in the frequency domain is determined using the second estimate of the channel. Extension signals are determined using the autocorrelation. The extension signals are appended to the first estimate of the channel to obtain a third estimate of the channel. The third estimate is used to provide a data signal in the frequency domain.

    摘要翻译： 具有导频的接收信号在具有导频的频域中被转换为第一信号。 从第一信号提取导频以获得提取的导频以形成第二信号。 第二信号用于提供信道的第一估计。 第一个估计值被转换为时域。 在时域中从第一估计中去除噪声，以提供时域中的信道的第二估计。 使用信道的第二估计来确定频域中的信道的自相关。 扩展信号使用自相关来确定。 扩展信号附加到信道的第一估计，以获得信道的第三估计。 第三个估计用于提供频域中的数据信号。

    Method of providing a data signal for channel estimation and circuit thereof
    3.
    发明授权
    Method of providing a data signal for channel estimation and circuit thereof 有权
    提供用于信道估计的数据信号的方法及其电路

    公开(公告)号：US08014457B2

    公开(公告)日：2011-09-06

    申请号：US12183762

    申请日：2008-07-31

    申请人： Ahsan U. Aziz ,  Leo G. Dehner

    发明人： Ahsan U. Aziz ,  Leo G. Dehner

    IPC分类号： H04K1/10

    CPC分类号： H04L25/0232 ,  H04L25/0216 ,  H04L27/2605 ,  H04L27/2647

    摘要： A received signal having pilots is converted to a first signal in the frequency domain having the pilots. The pilots are extracted from the first signal to obtain extracted pilots to form a second signal. The second signal is used to provide a first estimate of a channel. The first estimate is converted to the time domain. Noise is removed from the first estimate in the time domain to provide a second estimate of the channel in the time domain. An autocorrelation of the channel in the frequency domain is determined using the second estimate of the channel. Extension signals are determined using the autocorrelation. The extension signals are appended to the first estimate of the channel to obtain a third estimate of the channel. The third estimate is used to provide a data signal in the frequency domain.

    摘要翻译： 具有导频的接收信号在具有导频的频域中被转换为第一信号。 从第一信号提取导频以获得提取的导频以形成第二信号。 第二信号用于提供信道的第一估计。 第一个估计值被转换为时域。 在时域中从第一估计中去除噪声，以提供时域中的信道的第二估计。 使用信道的第二估计来确定频域中的信道的自相关。 扩展信号使用自相关来确定。 扩展信号附加到信道的第一估计，以获得信道的第三估计。 第三个估计用于提供频域中的数据信号。

    Techniques for improving channel estimation and tracking in a wireless communication system
    4.
    发明授权
    Techniques for improving channel estimation and tracking in a wireless communication system 有权
    在无线通信系统中改善信道估计和跟踪的技术

    公开(公告)号：US08238482B2

    公开(公告)日：2012-08-07

    申请号：US12250613

    申请日：2008-10-14

    申请人： Ning Chen ,  Ahsan U. Aziz ,  Leo G. Dehner ,  Taeyoon Kim

    发明人： Ning Chen ,  Ahsan U. Aziz ,  Leo G. Dehner ,  Taeyoon Kim

    IPC分类号： H04L27/06

    CPC分类号： H04L5/0053 ,  H04L25/0204 ,  H04L25/0236 ,  H04W28/04 ,  H04W56/0055

    摘要： A technique for performing channel tracking and/or channel estimation in a wireless communication device includes receiving a reference signal and one or more non-error propagation physical channel signals. In general, the one or more non-error propagation physical channel signals must be correctly decoded before a data channel can be decoded. Channel tracking and/or channel estimation are/is then performed based on the reference signal and at least one of the one or more non-error propagation physical channel signals.

    摘要翻译： 用于在无线通信设备中执行信道跟踪和/或信道估计的技术包括接收参考信号和一个或多个非错误传播物理信道信号。 一般来说，一个或多个非错误传播物理信道信号必须在数据信道可被解码之前被正确解码。 然后基于参考信号和一个或多个非错误传播物理信道信号中的至少一个执行信道跟踪和/或信道估计。

    TECHNIQUES FOR IMPROVING CHANNEL ESTIMATION AND TRACKING IN A WIRELESS COMMUNICATION SYSTEM
    5.
    发明申请
    TECHNIQUES FOR IMPROVING CHANNEL ESTIMATION AND TRACKING IN A WIRELESS COMMUNICATION SYSTEM 有权
    在无线通信系统中改进信道估计和跟踪的技术

    公开(公告)号：US20130034017A1

    公开(公告)日：2013-02-07

    申请号：US13567997

    申请日：2012-08-06

    申请人： Ning Chen ,  Ahsan U. Aziz ,  Leo G. Dehner ,  Taeyoon Kim

    发明人： Ning Chen ,  Ahsan U. Aziz ,  Leo G. Dehner ,  Taeyoon Kim

    IPC分类号： H04W16/00

    CPC分类号： H04L5/0053 ,  H04L25/0204 ,  H04L25/0236 ,  H04W28/04 ,  H04W56/0055

    摘要： A technique for performing channel tracking and/or channel estimation in a wireless communication device includes receiving a reference signal and one or more non-error propagation physical channel signals. In general, the one or more non-error propagation physical channel signals must be correctly decoded before a data channel can be decoded. Channel tracking and/or channel estimation are/is then performed based on the reference signal and at least one of the one or more non-error propagation physical channel signals.

    摘要翻译： 用于在无线通信设备中执行信道跟踪和/或信道估计的技术包括接收参考信号和一个或多个非错误传播物理信道信号。 一般来说，一个或多个非错误传播物理信道信号必须在数据信道可被解码之前被正确解码。 然后基于参考信号和一个或多个非错误传播物理信道信号中的至少一个执行信道跟踪和/或信道估计。

    Vector NCO and twiddle factor generator
    7.
    发明授权
    Vector NCO and twiddle factor generator 有权
    矢量NCO和旋转因子发生器

    公开(公告)号：US09087003B2

    公开(公告)日：2015-07-21

    申请号：US13666289

    申请日：2012-11-01

    申请人： Leo G. Dehner ,  Oded Yishay

    发明人： Leo G. Dehner ,  Oded Yishay

    IPC分类号： G06F17/14 ,  G06F1/03

    CPC分类号： G06F17/142 ,  G06F1/0328 ,  G06F17/14

    摘要： A method and apparatus may be used to generate complex exponentials for either frequency domain or time domain applications by programming input parameter values into a complex exponential vector generator (260) having a frequency generator stage (281) and a vector phase accumulator stage (282) arranged with a vector element multiplier stage (283) to generate complex exponential phase index values (α0, α1, . . . αv−1) that are processed by a complex exponential generator stage (284) to output a plurality of complex exponential values (e.g., ej2πα0, ej2πα1, . . . ej2παv−1) that may be rearranged by a permutation unit (286) for use by vector data path.

    摘要翻译： 方法和装置可以用于通过将输入参数值编程到具有频率发生器级（281）和矢量相位累加器级（282）的复指数矢量生成器（260）中来为频域或时域应用产生复指数， 布置有矢量元素乘法器级（283）以产生由复指数发生器级（284）处理的复数指数相位索引值（α0，α1，...αv-1），以输出多个复指数值 例如ej2＆pgr;α0，ej2＆pgr;α1，... ej2＆pgr;αv-1），其可以由置换单元（286）重新排列以供矢量数据路径使用。

    Method and system for wireless communications between base and mobile stations
    8.
    发明授权
    Method and system for wireless communications between base and mobile stations 有权
    基站和移动台之间无线通信的方法和系统

    公开(公告)号：US08346205B2

    公开(公告)日：2013-01-01

    申请号：US13190384

    申请日：2011-07-25

    申请人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

    发明人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

    IPC分类号： H04B1/16

    CPC分类号： H04B1/16 ,  H04B17/382 ,  H04W52/0225 ,  Y02D70/00 ,  Y02D70/1262

    摘要： A method and system for wireless communications between base and mobile stations use reference signals transmitted from base stations prior transmission of data signals. The reference signals are used to determine propagation characteristics of communication channels between the base and mobile stations and optimize, in real time, parameters of receivers of the mobile stations for processing the following data signals. Applications of the invention include wireless communication systems compliant with OFDMA, 3GPP LTE, RFN-OFDMA, OFDM, TDMA, and the like communication protocols.

    摘要翻译： 用于基站和移动站之间的无线通信的方法和系统在数据信号的传输之前使用从基站发送的参考信号。 参考信号用于确定基站和移动台之间的通信信道的传播特性，并实时优化用于处理以下数据信号的移动站接收机的参数。 本发明的应用包括符合OFDMA，3GPP LTE，RFN-OFDMA，OFDM，TDMA等的通信协议的无线通信系统。

    Techniques for Calibrating a Transceiver of a Communication Device
    10.
    发明申请
    Techniques for Calibrating a Transceiver of a Communication Device 有权
    用于校准通信设备的收发器的技术

    公开(公告)号：US20100041353A1

    公开(公告)日：2010-02-18

    申请号：US12191831

    申请日：2008-08-14

    申请人： Ronald C. Alford ,  Leo G. Dehner ,  Richard B. Meador ,  Christian J. Rotchford

    发明人： Ronald C. Alford ,  Leo G. Dehner ,  Richard B. Meador ,  Christian J. Rotchford

    IPC分类号： H04B17/00

    CPC分类号： H04B17/21 ,  H04B17/101 ,  H04B17/14

    摘要： A technique for calibrating a transceiver of a wireless communication device includes selectively coupling an output node of a transmitter of the transceiver to an input node of a receiver of the transceiver. A calibration signal is provided, from the output node of the transmitter, to the input node of the receiver. The calibration signal is down-converted, with the receiver, to provide a down-converted calibration signal. A discrete Fourier transform is performed on the down-converted calibration signal. Finally, one or more correction factors are determined based on an analysis of the discrete Fourier transform of the down-converted calibration signal. At least one of the correction factors is utilized to facilitate substantial cancellation of a direct current offset associated with the transceiver.

    摘要翻译： 用于校准无线通信设备的收发器的技术包括将收发器的发射机的输出节点选择性地耦合到收发器的接收机的输入节点。 从发射机的输出节点向接收机的输入节点提供校准信号。 校准信号与接收器进行下变频，以提供下变频校准信号。 对下变频校准信号进行离散傅里叶变换。 最后，基于对下变频校准信号的离散傅里叶变换的分析来确定一个或多个校正因子。 使用校正因子中的至少一个来促进与收发器相关联的直流偏移的实质性消除。