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    Multichannel orthogonal frequency division multiplexed receivers with antenna selection and maximum-ratio combining and associated methods
    93.
    发明授权
    Multichannel orthogonal frequency division multiplexed receivers with antenna selection and maximum-ratio combining and associated methods 有权
    多通道正交频分复用接收机，具有天线选择和最大比组合及相关方法

    公开(公告)号：US07649833B2

    公开(公告)日：2010-01-19

    申请号：US10749903

    申请日：2003-12-29

    申请人： Ali S Sadri ,  Alexander A. Maltsev ,  Sergey E Sergeyev ,  Alexei V Dayydov ,  Vadim S Sergeyev

    发明人： Ali S Sadri ,  Alexander A. Maltsev ,  Sergey E Sergeyev ,  Alexei V Dayydov ,  Vadim S Sergeyev

    IPC分类号： H04J11/00

    CPC分类号： H04W28/04 ,  H04B7/0857 ,  H04B7/0874 ,  H04L5/0023 ,  H04L27/2608 ,  H04L27/2647 ,  H04W24/00

    摘要： A reconfigurable multichannel receiver may selectively operate in increased throughput modes and/or increased range modes. In some embodiments, the receiver may select two or more antennas from a plurality of spatially diverse antennas to receive more than one subchannel of a wideband orthogonal frequency division multiplexed (OFDM) channel. Maximum-ratio combining may be performed on corresponding symbol-modulated subcarriers from the two or more antennas, and a single OFDM symbol may be generated from contributions from the subchannels received by the two or more antennas. In other embodiments, more than one subchannel of a wideband OFDM channel may be received through a single antenna selected from a plurality of spatially diverse antennas. In other embodiments, a single subchannel may be received by a plurality of spatially diverse antennas and maximum-ratio combining may be performed on corresponding symbol-modulated subcarriers received by the antennas.

    摘要翻译： 可重新配置的多通道接收器可以选择性地以增加的吞吐量模式和/或增加的范围模式操作。 在一些实施例中，接收机可以从多个空间多样的天线中选择两个或更多个天线，以接收宽带正交频分复用（OFDM）信道的多于一个子信道。 可以对来自两个或更多个天线的相应的符号调制副载波执行最大比组合，并且可以从由两个或更多个天线接收的子信道的贡献生成单个OFDM符号。 在其他实施例中，可以通过从多个空间多样的天线中选择的单个天线来接收多于一个的宽带OFDM信道的子信道。 在其他实施例中，单个子信道可以由多个空间上不同的天线接收，并且可以对由天线接收的对应的符号调制子载波执行最大比合并。

    MIMO TRANSMITTER AND METHOD FOR TRANSMITTING AN OFDM SYMBOL IN ACCORDANCE WITH AN IEEE 802.11 COMMUNICATION STANDARD OVER A PLURALITY OF SPATIAL CHANNELS
    94.
    发明申请
    MIMO TRANSMITTER AND METHOD FOR TRANSMITTING AN OFDM SYMBOL IN ACCORDANCE WITH AN IEEE 802.11 COMMUNICATION STANDARD OVER A PLURALITY OF SPATIAL CHANNELS 有权
    用于根据IEEE 802.11通信标准在多个空间信道上发送OFDM符号的MIMO发射机和方法

    公开(公告)号：US20090252257A1

    公开(公告)日：2009-10-08

    申请号：US12482671

    申请日：2009-06-11

    申请人： John Sadowsky ,  Minnie Ho ,  Sumeet Sandhu ,  Alexander A. Maltsev ,  Eric A. Jacobsen ,  Ali S. Sadri

    发明人： John Sadowsky ,  Minnie Ho ,  Sumeet Sandhu ,  Alexander A. Maltsev ,  Eric A. Jacobsen ,  Ali S. Sadri

    IPC分类号： H04K1/10 ,  H04L1/02 ,  H04L27/28

    CPC分类号： H04W16/28 ,  H04B7/0408 ,  H04L27/2602 ,  H04W74/02

    摘要： A multiple-input-multiple output (MIMO) transmitter for transmitting an orthogonal frequency division multiplexed (OFDM) symbol over a plurality of spatial channels using a plurality of antennas is described. The transmitter includes encoding circuitry to encode blocks of input bits in accordance with a variable encoding rate to generate blocks of encoded bits and a spatial-frequency parser to parse the blocks of encoded bits into spatial-frequency groups. The transmitter also includes subcarrier modulators to modulate each spatial-frequency group of encoded bits on one of the OFDM subcarriers to generate symbol-modulated subcarriers. Spatial-frequency groups having a greater number of encoded bits are modulated at higher-order modulation levels and spatial-frequency groups having a lesser number of encoded bits are modulated at lower-order modulation orders.

    摘要翻译： 描述了使用多个天线在多个空间信道上发送正交频分复用（OFDM）符号的多输入多输出（MIMO）发射机。 发射机包括编码电路，用于根据可变编码速率对输入比特块进行编码以产生编码比特块和空间频率解析器，以将编码比特的块解析为空间频率组。 发射机还包括子载波调制器，以调制OFDM子载波之一上的编码比特的每个空间频率组，以产生符号调制的副载波。 具有更多数量的编码比特的空间频率组在高阶调制级别被调制，并且具有较少编码比特数的空间频率组以低阶调制阶调制。

    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
    97.
    发明授权
    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system 有权
    多天线正交频分复用通信系统中自适应比特加载的系统和方法

    公开(公告)号：US07394858B2

    公开(公告)日：2008-07-01

    申请号：US10750587

    申请日：2003-12-29

    申请人： John S. Sadowsky ,  Minnie Ho ,  Sumeet Sandhu ,  Alexander A. Maltsev ,  Eric A. Jacobsen ,  Ali S Sadri

    发明人： John S. Sadowsky ,  Minnie Ho ,  Sumeet Sandhu ,  Alexander A. Maltsev ,  Eric A. Jacobsen ,  Ali S Sadri

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04W16/28 ,  H04B7/0408 ,  H04L27/2602 ,  H04W74/02

    摘要： In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath characteristics of the spatial channel allowing the communication of additional data without an increase in frequency bandwidth. Space-frequency subcarrier modulation assignments may be dynamically assigned on a per subcarrier basis as well as a per spatial channel basis to help maximize the data-carrying capacity of the channel. In some embodiments, each of the spatial channels may be associated with one of a plurality of spatially diverse antennas. In other embodiments, beamforming may be performed to allow the transmission and/or reception of signals within the spatial channels.

    摘要翻译： 在正交频分复用（OFDM）系统中，发射机和/或接收机在非正交空间信道上传送单独的数据流。 每个空间信道可以使用相同的OFDM子载波集合，并且可以利用空间信道的多径特性，允许附加数据的通信而不增加频带宽度。 可以在每个子载波基础上以及每个空间信道基础上动态分配空频子载波调制分配，以帮助最大化信道的数据承载能力。 在一些实施例中，每个空间信道可以与多个空间多样的天线中的一个相关联。 在其他实施例中，可以执行波束成形以允许空间信道内的信号的发送和/或接收。

    Systems and methods for high-throughput wideband wireless local area network communications
    98.
    发明授权
    Systems and methods for high-throughput wideband wireless local area network communications 有权
    用于高通量宽带无线局域网通信的系统和方法

    公开(公告)号：US07349436B2

    公开(公告)日：2008-03-25

    申请号：US10676372

    申请日：2003-09-30

    申请人： Alexander A. Maltsev ,  Ali S Sadri ,  Vadim S Sergeyev ,  Adrian P Stephens

    发明人： Alexander A. Maltsev ,  Ali S Sadri ,  Vadim S Sergeyev ,  Adrian P Stephens

    IPC分类号： H04J3/16 ,  H04J3/22

    CPC分类号： H04L5/0053 ,  H04L5/0007 ,  H04L5/0094 ,  H04L27/2602 ,  H04W72/0406 ,  H04W84/12

    摘要： A frame format provides for wideband wireless local area network communications and informs narrower-band communication units when the channels are occupied by wider-band communication units. In some embodiments, the frame format includes a channelization field identifying channels that are used for communicating subsequent wideband fields of a packet, and a wideband-header field communicated on the identified channels. The wideband-header field may identify sub-fields that may be present in the wideband-header field, and may identify the presence of a wideband-data field. A long-compatibility field may be present that provides protection at the MAC level. The long-compatibility field may transport MAC frames that may include medium-reservation information compatible with narrower-band communication units.

    摘要翻译： 帧格式提供宽带无线局域网通信，并且当信道被更宽带通信单元占用时通知窄带通信单元。 在一些实施例中，帧格式包括识别用于传送分组的后续宽带字段的信道的信道化字段以及在所识别的信道上传送的宽带报头字段。 宽带报头字段可以标识可能存在于宽带报头字段中的子字段，并且可以识别宽带数据字段的存在。 可能存在在MAC级提供保护的长兼容性字段。 长兼容性字段可以传送可能包括与窄带通信单元兼容的媒体预留信息的MAC帧。

    Wireless device with directional antennas for use in millimeter-wave peer-to-peer networks and methods for adaptive beam steering
    99.
    发明申请
    Wireless device with directional antennas for use in millimeter-wave peer-to-peer networks and methods for adaptive beam steering 有权
    具有用于毫米波对等网络的定向天线的无线设备和用于自适应波束转向的方法

    公开(公告)号：US20070287384A1

    公开(公告)日：2007-12-13

    申请号：US11452710

    申请日：2006-06-13

    申请人： Ali S. Sadri ,  Eduardo Casas ,  Duncan Kitchin

    发明人： Ali S. Sadri ,  Eduardo Casas ,  Duncan Kitchin

    IPC分类号： H04B1/00

    CPC分类号： H04W76/19 ,  H04B7/0491 ,  H04B7/0695 ,  H04W92/18

    摘要： Embodiments of wireless device and method for communicating in a wireless network are generally described herein. Other embodiments may be described and claimed. In some embodiments, a wireless device establishes a link using a directional antenna in an initially selected direction with another wireless device. If the link in the initially selected direction deteriorates, the link may be reestablished in a previously identified alternate direction. In some embodiments, the initially selected direction and the alternate direction are jointly selected by both the first and second wireless devices.

    摘要翻译： 本文中通常描述在无线网络中进行通信的无线设备和方法的实施例。 可以描述和要求保护其他实施例。 在一些实施例中，无线设备使用具有另一无线设备的初始选择方向的定向天线来建立链路。 如果最初选择的方向上的链路恶化，则可以在先前识别的替代方向上重新建立链路。 在一些实施例中，初始选择的方向和替代方向由第一和第二无线设备共同选择。

    Adaptive power control in wideband CDMA cellular systems (WCDMA) and methods of operation
    100.
    发明授权
    Adaptive power control in wideband CDMA cellular systems (WCDMA) and methods of operation 失效
    宽带CDMA蜂窝系统（WCDMA）中的自适应功率控制和操作方法

    公开(公告)号：US06690652B1

    公开(公告)日：2004-02-10

    申请号：US09413991

    申请日：1999-10-07

    申请人： Ali S. Sadri

    发明人： Ali S. Sadri

    IPC分类号： H04J1300

    CPC分类号： H04W52/267 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0059 ,  H04L1/0071 ,  H04W52/221 ,  H04W52/223 ,  H04W52/42

    摘要： A WCDMA system includes a Base Station (BS) transmitter, or forward transmitter and a pilot channel that transmits control signals between the BS and a Mobile Station (MS) to reconfigure their transmitter/receiver. Reconfiguration is performed according to the prediction of the channel attenuation and the threshold set at the BS or MS based on its channel power probability density function separated into three distinct equal probable regions. In one embodiment, Seamless Rate Change (SRC)/Transmitter Power Control (TPC) logic uses the predicted channel attenuation to signal both the transmitter and the receiver in a channel to reconfigure their transmit power level according to the power density function (pdf) of the channel power and threshold level. A transmission rate is reduced when the power level is below the threshold and increased when the channel power is above threshold. The pilot channel is used to signal the mobile station and the base station.

    摘要翻译： WCDMA系统包括基站（BS）发射机或前向发射机和在BS与移动台（MS）之间传输控制信号以重新配置其发射机/接收机的导频信道。 根据信道衰减的预测和基于其信道功率概率密度函数的BS或MS设置的阈值来进行重新配置，该函数被分成三个不同的相等可能区域。 在一个实施例中，无缝速率改变（SRC）/发射机功率控制（TPC）逻辑使用预测的信道衰减来在信道中向发射机和接收机两者发信号，以根据功率密度函数（pdf）重新配置其发射功率电平 通道功率和阈值水平。 当功率电平低于阈值时，当信道功率高于阈值时，传输速率降低。 导频信道用于向移动台和基站发信号。