利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

93 条记录 (耗时 0.023 秒)

    MIMO transmitter and method for transmitting OFDM symbols
    51.
    发明授权
    MIMO transmitter and method for transmitting OFDM symbols 有权
    MIMO发射机和发射OFDM符号的方法

    公开(公告)号：US08705645B2

    公开(公告)日：2014-04-22

    申请号：US13489595

    申请日：2012-06-06

    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： An orthogonal-frequency division multiplexed (OFDM) transmitter is configured to transmit a data unit in accordance with a multiple-input multiple-output (MIMO) technique over a wideband channel comprising a 20 MHz channel and another channel using a plurality of spatially diverse antennas. The transmitter is further configured to include in the data unit, a parameter indicating a modulation and coding scheme and a parameter indicating number of spatial streams. Each of the spatial streams is encoded and beamformed for receipt by one or more different receiving stations.

    摘要翻译： 正交频分复用（OFDM）发射机被配置为根据多输入多输出（MIMO）技术在包括20MHz信道的宽带信道和使用多个空间多样的天线的另一信道上发送数据单元 。 发射机还被配置为在数据单元中包括指示调制和编码方案的参数以及指示空间流数量的参数。 每个空间流被编码并且被波束形成以便由一个或多个不同的接收站接收。

    PROVIDING CQI FEEDBACK WITH COMMON CODE RATE TO A TRANSMITTER STATION
    54.
    发明申请
    PROVIDING CQI FEEDBACK WITH COMMON CODE RATE TO A TRANSMITTER STATION 有权
    向发射机站提供具有通用码率的CQI反馈

    公开(公告)号：US20110294438A1

    公开(公告)日：2011-12-01

    申请号：US13205589

    申请日：2011-08-08

    申请人： Qinghua Li ,  Guangjie Li ,  Xintian E. Lin ,  Minnie Ho

    发明人： Qinghua Li ,  Guangjie Li ,  Xintian E. Lin ,  Minnie Ho

    IPC分类号： H04W4/00

    CPC分类号： H04B7/0632 ,  H04B7/0641 ,  H04B7/0643 ,  H04L1/0025 ,  H04L1/0029

    摘要： Methods and apparatuses for providing CQI feedback to a transmitter station are described herein. In one implementation, an apparatus may include a transceiver to transmit and receive signals to and from a transmitter station, and a controller coupled to the transceiver to control the transceiver to transmit to the transmitter station a first channel quality indicator (CQI) that corresponds to a first modulation level to be used by the transmitter station to transmit first signals, and to control the transceiver to transmit to the transmitter station a differential indicator that comprises two bits or less to differentially indicate a second CQI relative to the first CQI, wherein the second CQI corresponds to a second modulation level to be used by the transmitter station to transmit second signals. Other embodiments may be described and/or claimed.

    摘要翻译： 本文描述了用于向发射机站提供CQI反馈的方法和装置。 在一个实现中，设备可以包括收发信机，用于向发射台发送信号和从发射机站接收信号，以及耦合到收发器的控制器，以控制收发信机向发射台发送对应于发射机的第一信道质量指示符（CQI） 要由发射机站用于发送第一信号的第一调制电平，并且控制收发信机向发射台发送包含两位或更少差分指示相对于第一CQI的第二CQI的差分指示符，其中， 第二CQI对应于由发射机站用于发射第二信号的第二调制电平。 可以描述和/或要求保护其他实施例。

    MIMO transmitter and method for transmitting a group of sequential OFDM symbols in accordance with an IEEE 802.16 communication standard
    56.
    发明授权
    MIMO transmitter and method for transmitting a group of sequential OFDM symbols in accordance with an IEEE 802.16 communication standard 有权
    MIMO发射机和根据IEEE 802.16通信标准发送一组连续OFDM符号的方法

    公开(公告)号：US07885346B2

    公开(公告)日：2011-02-08

    申请号：US12482689

    申请日：2009-06-11

    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： A multiple-input-multiple output (MIMO) transmitter for transmitting a group of sequential orthogonal frequency division multiplexed (OFDM) symbols on a time-division duplexed (TDD) channel in accordance with an IEEE 802.16 standard using a plurality of antennas. The MIMO transmitter comprises a spatial-frequency parser to parse a block of bits into spatial-frequency blocks of a variable number of coded bits, and subcarrier modulators to individually modulate OFDM subcarriers with the spatial-frequency blocks in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers. The TDD channel comprises a plurality of the groups of the OFDM subcarriers, and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments.

    摘要翻译： 一种多输入多输出（MIMO）发射机，用于使用多个天线根据IEEE 802.16标准在时分双工（TDD）信道上发送一组顺序正交频分复用（OFDM）符号。 MIMO发射机包括用于将比特块解析成可变数量的编码比特的空间频率块的空间频率解析器，以及根据空间频率副载波调制单独调制具有空间频率块的OFDM子载波的子载波调制器 用于生成符号调制子载波组的分配。 TDD信道包括多个OFDM子载波组，并且每个子载波组内的OFDM子载波和每个顺序的OFDM符号组内的OFDM副载波具有相同的空间频率副载波调制分配。

    Beam-former and combiner for a multiple-antenna system
    57.
    发明授权
    Beam-former and combiner for a multiple-antenna system 有权
    波束形成器和多天线系统的组合器

    公开(公告)号：US07746967B2

    公开(公告)日：2010-06-29

    申请号：US10427187

    申请日：2003-04-30

    申请人： Minnie Ho ,  Sumeet Sandhu

    发明人： Minnie Ho ,  Sumeet Sandhu

    IPC分类号： H04L1/02 ,  H04L27/08 ,  H04B7/02

    CPC分类号： H04B7/0842 ,  H04B7/0851 ,  H04B7/0854

    摘要： A compensating correction value for adjusting analog signals received from multiple antenna elements takes into account the effects of colored noise, co-channel interference, and inter-sample interference. The method of generating the compensating correction value for analog combining architectures considers the total channel impulse response over a block of time.

    摘要翻译： 用于调整从多个天线元件接收的模拟信号的补偿校正值考虑了彩色噪声，同频道干扰和样本间干扰的影响。 为模拟组合架构生成补偿校正值的方法考虑了一段时间内的总信道脉冲响应。

    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
    58.
    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：US07738579B2

    公开(公告)日：2010-06-15

    申请号：US12118838

    申请日：2008-05-12

    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 ,  H04L27/18

    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。

    MIMO TRANSMITTER AND METHOD FOR TRANSMITTING AN OFDM SYMBOL IN ACCORDANCE WITH AN IEEE 802.11 COMMUNICATION STANDARD OVER A PLURALITY OF SPATIAL CHANNELS
    60.
    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。