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    Channel estimation for OFDM systems
    1.
    发明授权
    Channel estimation for OFDM systems 失效
    OFDM系统的信道估计

    公开(公告)号：US08031787B2

    公开(公告)日：2011-10-04

    申请号：US11946214

    申请日：2007-11-28

    申请人： Stefan Fechtel ,  Christian Rom ,  Benny Vejlgaard

    发明人： Stefan Fechtel ,  Christian Rom ,  Benny Vejlgaard

    IPC分类号： H04K1/00

    CPC分类号： H04L25/022 ,  H04L25/0212 ,  H04L25/0232

    摘要： In a method for channel estimation of an OFDM signal transmitted via a channel, an initial channel transfer function is calculated by channel estimation. A channel impulse response is calculated on the basis of the initial channel transfer function. Values of the channel impulse response or of a filtered channel impulse response are classified as noise or as a signal as a function of the level of the values of the channel impulse or of the level of the values of the filtered channel impulse response. A noise-reduced channel impulse response is calculated on the basis of the channel impulse response using the classification, and a noise-reduced channel transfer function is calculated on the basis of this noise-reduced channel impulse response.

    摘要翻译： 在通过信道发送的OFDM信号的信道估计方法中，通过信道估计来计算初始信道传递函数。 基于初始信道传递函数计算信道脉冲响应。 信道脉冲响应或经滤波的信道脉冲响应的值被分类为噪声或作为信道脉冲的值的水平或滤波的信道脉冲响应的值的电平的函数的信号。 基于使用分类的信道脉冲响应来计算噪声降低的信道脉冲响应，并且基于该降噪信道脉冲响应来计算噪声降低的信道传递函数。

    Radio devices and methods for controlling radio devices
    3.
    发明授权
    Radio devices and methods for controlling radio devices 有权
    用于控制无线电设备的无线电设备和方法

    公开(公告)号：US09008581B2

    公开(公告)日：2015-04-14

    申请号：US12614440

    申请日：2009-11-08

    申请人： Markus Mueck ,  Christian Drewes ,  Christian Rom ,  Wen Xu

    发明人： Markus Mueck ,  Christian Drewes ,  Christian Rom ,  Wen Xu

    IPC分类号： H04B1/00 ,  H04W72/00 ,  H04W24/00 ,  H04W72/08 ,  H04M1/725 ,  H04W8/00 ,  H04W28/18

    CPC分类号： H04W72/085 ,  H04M1/725 ,  H04M2250/02 ,  H04M2250/06 ,  H04W8/005 ,  H04W28/18

    摘要： In an embodiment, a radio device is provided. The radio device may include a signal transmitter configured to transmit a plurality of signals, the signals being transmitted with different intensities; a response receiver configured to receive a response message to one of the transmitted signals from a radio communication device having received the respective transmitted signal of the plurality of transmitted signals, the response message identifying the received message; and a assessment circuit configured to assess the reachability of the radio communication device from the radio device based on the intensity of the signal to which the radio communication device has responded.

    摘要翻译： 在一个实施例中，提供无线电设备。 无线电设备可以包括被配置为发送多个信号的信号发射机，所述信号以不同的强度发送; 响应接收器，其被配置为从已经接收到所述多个发送信号的相应发送信号的无线电通信设备向所发送的信号之一接收响应消息，所述响应消息标识所接收的消息; 以及评估电路，被配置为基于无线电通信设备已经响应的信号的强度来评估无线电设备从无线电设备的可达性。

    CHANNEL ESTIMATION FOR OFDM SYSTEMS
    4.
    发明申请
    CHANNEL ESTIMATION FOR OFDM SYSTEMS 失效
    OFDM系统的信道估计

    公开(公告)号：US20080130771A1

    公开(公告)日：2008-06-05

    申请号：US11946214

    申请日：2007-11-28

    申请人： Stefan Fechtel ,  Christian Rom ,  Benny Vejlgaard

    发明人： Stefan Fechtel ,  Christian Rom ,  Benny Vejlgaard

    IPC分类号： H04K1/10

    CPC分类号： H04L25/022 ,  H04L25/0212 ,  H04L25/0232

    摘要： In a method for channel estimation of an OFDM signal transmitted via a channel, an initial channel transfer function is calculated by channel estimation. A channel impulse response is calculated on the basis of the initial channel transfer function. Values of the channel impulse response or of a filtered channel impulse response are classified as noise or as a signal as a function of the level of the values of the channel impulse or of the level of the values of the filtered channel impulse response. A noise-reduced channel impulse response is calculated on the basis of the channel impulse response using the classification, and a noise-reduced channel transfer function is calculated on the basis of this noise-reduced channel impulse response.

    摘要翻译： 在通过信道发送的OFDM信号的信道估计方法中，通过信道估计来计算初始信道传递函数。 基于初始信道传递函数计算信道脉冲响应。 信道脉冲响应或经滤波的信道脉冲响应的值被分类为噪声或作为信道脉冲的值的水平或滤波的信道脉冲响应的值的电平的函数的信号。 基于使用分类的信道脉冲响应来计算噪声降低的信道脉冲响应，并且基于该降噪信道脉冲响应来计算噪声降低的信道传递函数。

    RADIO DEVICES AND METHODS FOR CONTROLLING RADIO DEVICES
    6.
    发明申请
    RADIO DEVICES AND METHODS FOR CONTROLLING RADIO DEVICES 有权
    用于控制无线电设备的无线电设备和方法

    公开(公告)号：US20110111764A1

    公开(公告)日：2011-05-12

    申请号：US12614440

    申请日：2009-11-08

    申请人： Markus Mueck ,  Christian Drewes ,  Christian Rom ,  Wen Xu

    发明人： Markus Mueck ,  Christian Drewes ,  Christian Rom ,  Wen Xu

    IPC分类号： H04W72/00 ,  H04B17/00 ,  H04W72/08 ,  H04B15/00

    CPC分类号： H04W72/085 ,  H04M1/725 ,  H04M2250/02 ,  H04M2250/06 ,  H04W8/005 ,  H04W28/18

    摘要： In an embodiment, a radio device is provided. The radio device may include a signal transmitter configured to transmit a plurality of signals, the signals being transmitted with different intensities; a response receiver configured to receive a response message to one of the transmitted signals from a radio communication device having received the respective transmitted signal of the plurality of transmitted signals, the response message identifying the received message; and a assessment circuit configured to assess the reachability of the radio communication device from the radio device based on the intensity of the signal to which the radio communication device has responded.

    摘要翻译： 在一个实施例中，提供无线电设备。 无线电设备可以包括被配置为发送多个信号的信号发射机，所述信号以不同的强度发送; 响应接收器，其被配置为从已经接收到所述多个发送信号的相应发送信号的无线电通信设备向所发送的信号之一接收响应消息，所述响应消息标识所接收的消息; 以及评估电路，被配置为基于无线电通信设备已经响应的信号的强度来评估无线电设备从无线电设备的可达性。