利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

234 条记录 (耗时 0.021 秒)

    Frequency domain equalization
    4.
    发明授权
    Frequency domain equalization 有权
    频域均衡

    公开(公告)号：US07388907B2

    公开(公告)日：2008-06-17

    申请号：US11184680

    申请日：2005-07-19

    申请人： Anand G. Dabak ,  Eko Onggosanusi

    发明人： Anand G. Dabak ,  Eko Onggosanusi

    IPC分类号： H04B1/00 ,  H03H7/30

    CPC分类号： H04L25/03159 ,  H04L2025/03375 ,  H04L2025/03426 ,  H04L2025/03522

    摘要： A radio receiver 102 is provided. The radio receiver 102 comprises one or more data Fast Fourier Transformers, each data Fast Fourier Transformer operable to perform a Fast Fourier Transform on an input data block, one or more impulse response Fast Fourier Transformers, each impulse response Fast Fourier Transformer operable to perform a Fast Fourier Transform on a channel impulse response, one or more multiplier components operable to multiply a term of the output of one of the data Fast Fourier Transformers by a term of the output of one of the impulse response Fast Fourier Transformers, and one or more Inverse Fast Fourier Transformers, each Inverse Fast Fourier Transformer operable to perform an Inverse Fast Fourier Transform based on an output of one or more of the multipliers.

    摘要翻译： 提供无线电接收机102。 无线电接收器102包括一个或多个数据快速傅立叶变换器，每个数据快速傅立叶变换器可操作以对输入数据块执行快速傅里叶变换，一个或多个脉冲响应快速傅立叶变换器，每个脉冲响应快速傅立叶变换器可操作以执行 对信道脉冲响应的快速傅立叶变换，一个或多个乘法器组件，可操作以将数据快速傅里叶变换器之一的输出的项乘以脉冲响应快速傅立叶变换器之一的输出项，以及一个或多个 快速傅里叶逆变换器，每个快速傅里叶逆变换器可操作以基于一个或多个乘法器的输出执行快速傅立叶逆变换。

    Reverse Viterbi and forward serial list Viterbi decoding for FER
    5.
    发明授权
    Reverse Viterbi and forward serial list Viterbi decoding for FER 有权
    反向维特比和正向串行列表维特比解码为FER

    公开(公告)号：US08483327B2

    公开(公告)日：2013-07-09

    申请号：US12383154

    申请日：2009-03-20

    申请人： Timothy M. Schmidl ,  Ariel Zaltsman ,  Anand G. Dabak

    发明人： Timothy M. Schmidl ,  Ariel Zaltsman ,  Anand G. Dabak

    IPC分类号： H04L27/06

    CPC分类号： H03M13/4115 ,  H03M13/09 ,  H03M13/356 ,  H03M13/4169

    摘要： A convolutionally encoded frame to be decoded includes a first portion of bits having additional error protection and another portion without additional error protection. The decoding of the frame involves reverse Viterbi decoding or Viterbi decoding on a reversed bit sequence followed by applying a serial list Viterbi algorithm to the first portion. The result is that the list of probable sequences have unique sets of bits in the first portion.

    摘要翻译： 要解码的卷积编码帧包括具有附加错误保护的第一部分位和不具有附加错误保护的另一部分。 该帧的解码涉及对反向比特序列的逆维特比解码或维特比解码，然后将序列表维特比算法应用于第一部分。 结果是可能序列的列表在第一部分中具有唯一的位集合。

    Wireless MIMO transmitter with antenna and tone precoding blocks
    9.
    发明授权
    Wireless MIMO transmitter with antenna and tone precoding blocks 有权
    具有天线和音调预编码块的无线MIMO发射机

    公开(公告)号：US08023589B2

    公开(公告)日：2011-09-20

    申请号：US11199629

    申请日：2005-08-09

    申请人： Eko Onggosanusi ,  Anand G. Dabak

    发明人： Eko Onggosanusi ,  Anand G. Dabak

    IPC分类号： H04L27/00

    CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0619 ,  H04L5/023 ,  H04L25/0206 ,  H04L27/2608

    摘要： Various wireless precoding systems and methods are presented. In some embodiments, a wireless transmitter comprises an antenna precoding block, a transform block, and multiple transmit antennas. The antenna precoding block receives frequency coefficients from multiple data streams and distributes the frequency coefficients across multiple transmit signals in accordance with frequency-dependent matrices. The transform block transforms the precoded frequency coefficients into multiple time domain transmit signals to be transmitted by the multiple antennas. The frequency coefficients from multiple data streams may be partitioned into tone groups, and all the frequency coefficients from a given tone group may be redistributed in accordance with a single matrix for that tone group. In some implementations, the frequency coefficients within a tone group for a given data stream may also be precoded. In some alternative embodiments, tone group precoding may be employed in a single channel system.

    摘要翻译： 提出了各种无线预编码系统和方法。 在一些实施例中，无线发射机包括天线预编码块，变换块和多个发射天线。 天线预编码块从多个数据流接收频率系数，并根据频率依赖矩阵在多个发射信号之间分配频率系数。 变换块将预编码的频率系数转换成由多个天线发射的多个时域发射信号。 来自多个数据流的频率系数可以被划分为音调组，并且来自给定音调组的所有频率系数可以根据该音调组的单个矩阵重新分配。 在一些实现中，给定数据流的音调组内的频率系数也可以被预编码。 在一些替代实施例中，音调组预编码可以用于单个信道系统中。

    Wireless system with hybrid automatic retransmission request in interference-limited communications
    10.
    发明授权
    Wireless system with hybrid automatic retransmission request in interference-limited communications 有权
    具有混合自动重传请求的无线系统在受干扰有限的通信中

    公开(公告)号：US09094248B2

    公开(公告)日：2015-07-28

    申请号：US11931311

    申请日：2007-10-31

    申请人： Eko N. Onggosanusi ,  Anand G. Dabak ,  Timothy M. Schmidl

    发明人： Eko N. Onggosanusi ,  Anand G. Dabak ,  Timothy M. Schmidl

    IPC分类号： H04B7/02 ,  H04L25/03 ,  H04L1/06 ,  H04L1/18 ,  H04L25/06 ,  H04L1/16 ,  H04L25/02

    CPC分类号： H04L25/03038 ,  H04L1/06 ,  H04L1/16 ,  H04L1/1812 ,  H04L25/0228 ,  H04L25/067 ,  H04L2025/0342 ,  H04L2025/03624 ,  Y10S370/913

    摘要： A wireless receiver for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, where the signals comprise a plurality of symbols. The receiver comprises a plurality of receive antennas and collection circuitry for collecting a plurality of signal samples with at least one symbol and with interference effects between different symbols. The receiver also comprises suppression circuitry, for suppressing the interference effects. The receiver also comprises circuitry for receiving signals from the suppression circuitry and for providing estimates of a group of bits. The receiver also comprises error detection circuitry for detecting an error in a packet that comprises the group of bits. Lastly, the receiver also comprises circuitry for requesting the transmitter to transmit a retransmission of a packet in response to detecting the error.

    摘要翻译： 一种无线接收机，用于在受干扰限制的系统中从干扰受限的发射机接收信号，该系统包括至少一个发射天线，其中信号包括多个符号。 接收机包括多个接收天线和收集电路，用于收集具有至少一个符号的多个信号采样并且在不同符号之间具有干扰效应。 接收机还包括用于抑制干扰效应的抑制电路。 接收机还包括用于从抑制电路接收信号并提供一组比特的估计的电路。 接收机还包括用于检测包含该比特组的分组中的错误的错误检测电路。 最后，接收机还包括用于响应于检测到错误而请求发送器发送分组的重传的电路。