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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。

    METHODS AND ARRANGEMENTS TO EXTEND OPERATIONAL BANDWIDTH
    9.
    发明申请
    METHODS AND ARRANGEMENTS TO EXTEND OPERATIONAL BANDWIDTH 审中-公开
    方法和安排延长操作带宽

    公开(公告)号：US20170034317A1

    公开(公告)日：2017-02-02

    申请号：US15106277

    申请日：2013-12-28

    申请人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

    发明人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

    IPC分类号： H04L29/06 ,  H04W72/04

    CPC分类号： H04L69/22 ,  H04L27/2626 ,  H04L69/323 ,  H04W72/044 ,  H04W84/12

    摘要： Logic may parse a data stream into two or more 80 megahertz or 160 megahertz bandwidth frequency segments. Logic may parse a data stream into two or more frequency segments having a total bandwidth of greater than 160 megahertz. Logic may deparse the data stream prior to transmitting the data stream to transmit a communication with a contiguous bandwidth of greater than 160 megahertz. Logic may deparse the data stream prior to space-time block coding of the data stream. Logic may transmit the data stream in two or more frequency segments having a total bandwidth of greater than 160 megahertz. Logic may receive a communication with a contiguous bandwidth or two or more frequency segments with contiguous or non-contiguous bandwidths. Logic may parse a communication with a contiguous bandwidth into two or more frequency segments. And logic may deparse the frequency segments to decode the communication.

    摘要翻译： 逻辑可以将数据流解析为两个或更多个80兆赫兹或160兆赫兹带宽频率段。 逻辑可以将数据流解析成具有大于160兆赫的总带宽的两个或更多个频段。 在发送数据流之前，逻辑可能会使数据流松散，以传输具有大于160兆赫兹的连续带宽的通信。 在数据流的空时块编码之前，逻辑可以削弱数据流。 逻辑可以在总带宽大于160兆赫兹的两个或多个频段中发送数据流。 逻辑可以接收具有连续带宽或具有连续或不连续带宽的两个或多个频率段的通信。 逻辑可以将具有连续带宽的通信解析为两个或更多个频率段。 并且逻辑可以削弱频段以解码通信。

    ACCESS POINT (AP), USER STATION (STA) AND METHOD FOR SPATIAL MODULATION ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (SM-OFDM) COMMUNICATION
    10.
    发明申请
    ACCESS POINT (AP), USER STATION (STA) AND METHOD FOR SPATIAL MODULATION ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (SM-OFDM) COMMUNICATION 有权
    接入点（AP），用户站（STA）和用于空间调制正交频分多址（SM-OFDM）通信的方法

    公开(公告)号：US20160381684A1

    公开(公告)日：2016-12-29

    申请号：US14748791

    申请日：2015-06-24

    申请人： Ahmed Gamal Helmy Mohamed ,  Eldad Perahia ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Mohamed K. Hassanin

    发明人： Ahmed Gamal Helmy Mohamed ,  Eldad Perahia ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Mohamed K. Hassanin

    IPC分类号： H04W72/04 ,  H04L1/00 ,  H04B7/02

    CPC分类号： H04L1/0071 ,  H04B7/028 ,  H04L1/0041 ,  H04L5/0023 ,  H04L5/0044

    摘要： Embodiments of an access point (AP), user station (STA), and method for spatial modulation orthogonal frequency division multiplexing (SM-OFDM) communication in a wireless network are generally described herein. The AP may transmit an SM-OFDM signal that comprises multiple OFDM signals. The SM-OFDM signal may be transmitted in channel resources that comprise multiple sub-carriers and the OFDM signals may be based at least partly on data symbols for used data portions of the sub-carriers. The used data portions may be based on a first portion of encoded bits and the data symbols for the used data portions may be based on a second portion of the encoded bits. In some examples, the used data portions of the sub-carriers may be different for at least some of the OFDM signals.

    摘要翻译： 无线网络中用于空间调制正交频分复用（SM-OFDM）通信的接入点（AP），用户站（STA）和方法的实施例在这里通常被描述。 AP可以发送包括多个OFDM信号的SM-OFDM信号。 可以在包括多个子载波的信道资源中发送SM-OFDM信号，并且OFDM信号可以至少部分地基于用于子载波的使用数据部分的数据符号。 所使用的数据部分可以基于编码比特的第一部分，并且所使用的数据部分的数据符号可以基于编码比特的第二部分。 在一些示例中，对于至少一些OFDM信号，子载波的使用数据部分可以是不同的。