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    CHANNEL TRACKING IN AN OFDM WIRELESS RECEIVER
    1.
    发明申请
    CHANNEL TRACKING IN AN OFDM WIRELESS RECEIVER 有权
    OFDM无线接收机中的信道跟踪

    公开(公告)号：US20080232497A1

    公开(公告)日：2008-09-25

    申请号：US12130368

    申请日：2008-05-30

    申请人： Brian Hart ,  David J. Pignatelli ,  Eldad Perahia ,  Paul C.P. Dankoski

    发明人： Brian Hart ,  David J. Pignatelli ,  Eldad Perahia ,  Paul C.P. Dankoski

    IPC分类号： H04L27/28 ,  H03D1/04

    CPC分类号： H04L25/0228 ,  H04L27/2647

    摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.

    摘要翻译： 一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。 接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。 该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。 该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积 估价和决策后价值的比值。 该复值产品形成用于更新存储数量的当前通道估计值的度量。

    Channel tracking in an OFDM wireless receiver
    2.
    发明授权
    Channel tracking in an OFDM wireless receiver 有权
    OFDM无线接收机中的信道跟踪

    公开(公告)号：US07821915B2

    公开(公告)日：2010-10-26

    申请号：US12130368

    申请日：2008-05-30

    申请人： Brian Hart ,  David J. Pignatelli ,  Eldad Perahia ,  Paul C. P. Dankoski

    发明人： Brian Hart ,  David J. Pignatelli ,  Eldad Perahia ,  Paul C. P. Dankoski

    IPC分类号： H04J11/00

    CPC分类号： H04L25/0228 ,  H04L27/2647

    摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.

    摘要翻译： 一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。 接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。 该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。 该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积 估价和决策后价值的比值。 该复值产品形成用于更新存储数量的当前通道估计值的度量。

    Channel tracking in a OFDM wireless receiver
    3.
    发明授权
    Channel tracking in a OFDM wireless receiver 有权
    OFDM无线接收机中的信道跟踪

    公开(公告)号：US07397758B1

    公开(公告)日：2008-07-08

    申请号：US10807547

    申请日：2004-03-22

    申请人： Brian Hart ,  David J. Pignatelli ,  Eldad Perahia ,  Paul C. P. Dankoski

    发明人： Brian Hart ,  David J. Pignatelli ,  Eldad Perahia ,  Paul C. P. Dankoski

    IPC分类号： H04J11/00 ,  H04J1/00

    CPC分类号： H04L25/0228 ,  H04L27/2647

    摘要： An apparatus and a method to estimate the channel response for a set of subcarriers in an OFDM receiver. The receiver receives a packet of information that includes a known transmitted part having known subcarrier values, and includes a signal-to-tone transformer to determine the subcarriers of a signal corresponding to a received packet. For each subcarrier, the method stores a function of an initial estimate of the channel response for the subcarrier, and accepts a post-channel correction pre-decision constellation point value for the subcarrier. The method further includes making a decision using the pre-decision constellation point value, re-modulating the decision to form a post-decision constellation point value, and forming a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values to forms a measure of the current channel estimate to use for updating the stored quantity.

    摘要翻译： 一种用于估计OFDM接收机中的一组子载波的信道响应的装置和方法。 接收机接收包括具有已知子载波值的已知发射部分的信息分组，并且包括信号到音调变换器以确定与接收到的分组相对应的信号的子载波。 对于每个子载波，该方法存储子载波的信道响应的初始估计的函数，并且接收用于子载波的信道后校正预决定星座点值。 该方法还包括使用预决定星座点值进行判定，重新调制决定以形成后决定星座点值，以及形成子载波和复合物的第一估计的函数的复值乘积 预判定值和后决定值的估值比率，以形成用于更新存储数量的当前信道估计值的度量。

    Multiple antenna processing on transmit for wireless local area networks
    6.
    发明授权
    Multiple antenna processing on transmit for wireless local area networks 有权
    用于无线局域网的多天线处理

    公开(公告)号：US09002299B2

    公开(公告)日：2015-04-07

    申请号：US10957107

    申请日：2004-10-01

    申请人： Eldad Perahia ,  Bretton Lee Douglas ,  Brian Hart ,  Daniel Joseph Lyons

    发明人： Eldad Perahia ,  Bretton Lee Douglas ,  Brian Hart ,  Daniel Joseph Lyons

    IPC分类号： H04B7/00 ,  H04L25/03 ,  H04L25/02 ,  H04B7/06 ,  H04L27/00

    CPC分类号： H04B7/0608 ,  H04B7/0602 ,  H04B7/0615 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/03343 ,  H04L27/2601 ,  H04L2027/0095 ,  H04W84/12

    摘要： A method and an apparatus in a first wireless station of a network transmitting to a second wireless station. The network uses multi-tone OFDM signals. The first station includes multiple antennas and a receive and a transmit signal path per antenna. Each receive signal path includes a discrete Fourier transformer determining the tones in a received signal, and each transmit signal path includes an inverse discrete Fourier transformer converting tones to a signal. The method includes determining channel estimates for each tone and each receive path while receiving from the second station, determining transmit weights to transmit to the second station, tone-by-tone weighting a signal for transmission to the second station to produce weighted tone sets for each transmit signal path, and transmitting the weighted tone sets. The first station is configured so that the weighting produces additive beamforming without the second station needing multiple antennas.

    摘要翻译： 一种发送到第二无线站的网络的第一无线站中的方法和装置。 网络使用多音频OFDM信号。 第一站包括多个天线以及每个天线的接收和发射信号路径。 每个接收信号路径包括确定接收信号中的音调的离散傅里叶变换器，并且每个发射信号路径包括将音调转换为信号的离散傅立叶变换逆变换器。 该方法包括确定每个音调和每个接收路径的信道估计，同时从第二站接收确定发送权重以发送给第二站，逐个音调加权信号以传输到第二站以产生加权音调集合 每个发送信号路径，并发送加权音调集。 第一站被配置为使得加权产生加法波束成形，而不需要第二站需要多个天线。

    Acquiring a signal parameter for a neighboring access point
    7.
    发明授权
    Acquiring a signal parameter for a neighboring access point 有权
    获取相邻接入点的信号参数

    公开(公告)号：US08861383B2

    公开(公告)日：2014-10-14

    申请号：US12689840

    申请日：2010-01-19

    申请人： Santosh Pandey ,  Allan Thomson ,  Brian Hart ,  Jagdish Girimaji

    发明人： Santosh Pandey ,  Allan Thomson ,  Brian Hart ,  Jagdish Girimaji

    IPC分类号： G01R31/08 ,  H04W48/16 ,  H04W64/00 ,  H04W36/08

    CPC分类号： H04W48/16 ,  H04W36/08 ,  H04W64/00

    摘要： In an example embodiment, a wireless device is configured to associate with a first access point on a first frequency. The wireless device listens for a predefined frame, which may be sent by neighboring access points or other wireless devices. When the wireless device receives a signal comprising a predefined frame, the wireless device acquires a parameter, such as signal strength, for the signal. The wireless device sends the parameter for the signal to the first access point.

    摘要翻译： 在示例实施例中，无线设备被配置为在第一频率上与第一接入点相关联。 无线设备侦听可由相邻接入点或其他无线设备发送的预定义帧。 当无线设备接收到包括预定义帧的信号时，无线设备获取信号的诸如信号强度的参数。 无线设备将信号的参数发送到第一接入点。

    Convertible Trailer and Storage Basket
    9.
    发明申请
    Convertible Trailer and Storage Basket 有权
    可转换拖车和储物篮

    公开(公告)号：US20130221629A1

    公开(公告)日：2013-08-29

    申请号：US13776849

    申请日：2013-02-26

    申请人： Brian Hart

    发明人： Brian Hart

    IPC分类号： B62D63/06

    CPC分类号： B62D63/061 ,  B62J9/00 ,  B62K27/003

    摘要： Provided is an all-terrain trailer for hauling large objects over uneven landscapes. The trailer is capable of carrying items within its volume in both its deployed and stowed state. Deployed, the trailer is a basket shaped body with a pair of wheels removably secured via a removable axle. The trailer is attached to the lead vehicle using a removable trailer hitch linkage that is secured to the basket body via fasteners. In a stowed state, the tires and axle are stored within a storage area in a lower portion of the basket body. In one embodiment, a false bottom is placed over the storage area, creating a flat trailer bed that objects can be laid upon. The basket body is removably secured to the hood of a lead vehicle, thereby providing a carrying basket while the vehicle is in transit.

    摘要翻译： 提供了一个全地形拖车，用于拖拉不平坦的景观上的大物体。 拖车能够在其部署和收起状态下携带其体积内的物品。 拖车是一个篮子形的主体，一对轮子通过一个可拆卸的轴可拆卸地固定。 拖车使用可移动的挂车联结装置连接到牵引车辆，该联动装置通过紧固件固定到筐体上。 在收起状态下，轮胎和轴被储存在篮体的下部的存储区域内。 在一个实施例中，将假底部放置在存储区域上方，形成可放置对象的平坦拖车床。 筐体可拆卸地固定到引导车辆的引擎盖上，从而在车辆行驶时提供载物篮。

    Adaptive AGC in a wireless network receiver
    10.
    发明授权
    Adaptive AGC in a wireless network receiver 有权
    无线网络接收机中的自适应AGC

    公开(公告)号：US07668523B2

    公开(公告)日：2010-02-23

    申请号：US11672132

    申请日：2007-02-07

    申请人： Andrew R. Adams ,  Philip J. Ryan ,  Brian Hart

    发明人： Andrew R. Adams ,  Philip J. Ryan ,  Brian Hart

    IPC分类号： H04B1/16

    CPC分类号： H04W52/52 ,  H03G3/3068

    摘要： An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal path including a plurality of sections including a first section coupled to the antenna subsystem and a next section. Each section has an adjustable gain and is able to provide a measure of the signal strength at its output. The method includes waiting for a start of packet indication, providing a measure of the signal strength at the output of the first section and the next section, and adjusting the gains of the first and the next sections using the provided measured signal strengths. In one embodiment, the receive signal path includes a filter, the provided measure for the first section is before the filter, and the provided measure for the second section is after the filter. The gain adjusting sets first section's gain according to the measured signal strength at the output of the first section and sets the next section's gain according to the provided measure of signal strength at the output of the next section relative to the provided measure of signal strength at the output of the first section. In one embodiment, the gain adjusting o is carried out in sequential AGC stages, one stage setting the gain of one or more sections.

    摘要翻译： 存储用于实现方法的指令的装置，载体介质以及用于控制无线电接收机的增益的方法，用于在无线网络中接收信息分组。 接收机连接到天线子系统，并且具有包括多个部分的接收信号路径，所述多个部分包括耦合到天线子系统的第一部分和下一部分。 每个部分都有一个可调节的增益，能够提供其输出信号强度的测量。 该方法包括等待分组指示的开始，提供在第一部分和下一部分的输出处的信号强度的测量，以及使用所提供的测量信号强度来调整第一和下一个部分的增益。 在一个实施例中，接收信号路径包括滤波器，所提供的第一部分的测量在滤波器之前，并且所提供的第二部分的测量值在滤波器之后。 增益调整根据第一部分输出端的测量信号强度设置第一部分的增益，并根据提供的下一部分输出端的信号强度相对于所提供的信号强度测量值来设置下一部分的增益 第一部分的输出。 在一个实施例中，增益调整o在连续AGC阶段中执行，一个阶段设置一个或多个部分的增益。