Guard section length detection method and system
    11.
    发明授权
    Guard section length detection method and system 有权
    保护段长度检测方法和系统

    公开(公告)号:US07860178B2

    公开(公告)日:2010-12-28

    申请号:US11889958

    申请日:2007-08-17

    IPC分类号: H04K1/10

    摘要: A guard section length detection method is disclosed. In the method, a guard section length detection method is used in an OFDM system. The OFDM symbol includes a data interval having a first length, and a guard section having a guard section length. The method detects a first symbol boundary and a second symbol boundary, and determines the guard section length based on a length between the first symbol boundary and the second symbol boundary.

    摘要翻译: 公开了一种防护部长度检测方法。 在该方法中,在OFDM系统中使用保护部分长度检测方法。 OFDM符号包括具有第一长度的数据间隔和具有保护部分长度的保护部分。 该方法检测第一符号边界和第二符号边界,并且基于第一符号边界和第二符号边界之间的长度来确定保护部分长度。

    Guard section length detection method and system
    12.
    发明授权
    Guard section length detection method and system 有权
    保护段长度检测方法和系统

    公开(公告)号:US08121229B2

    公开(公告)日:2012-02-21

    申请号:US11826031

    申请日:2007-07-11

    IPC分类号: H04L27/06

    摘要: A guard section length detection method detects whether a preamble signal is received. A short preamble boundary is then detected, then detecting a frame boundary and detecting a guard section length. In the step of detecting the guard section length a second matched filter capable of processing 128 point data sets is detected. Four different 128 point data sets have a distance of 8 points, 16 points, 32 points, and 64 points respectively from the frame boundary to the second matched filter. Four signal correlation values are calculated for determining the guard section length.

    摘要翻译: 保护部分长度检测方法检测是否接收到前置信号。 然后检测短前导码边界,然后检测帧边界并检测保护段长度。 在检测保护段长度的步骤中,检测能够处理128点数据集的第二匹配滤波器。 四个不同的128点数据集分别具有从帧边界到第二匹配滤波器的8点,16点,32点和64点的距离。 计算四个信号相关值以确定防护段长度。

    Method for estimating and compensating IQ imbalance in OFDM systems
    13.
    发明授权
    Method for estimating and compensating IQ imbalance in OFDM systems 有权
    IQ系统估计和补偿IQ失衡的方法

    公开(公告)号:US07652976B2

    公开(公告)日:2010-01-26

    申请号:US11797723

    申请日:2007-05-07

    IPC分类号: H04J11/00

    摘要: A method for compensating IQ imbalance is disclosed. First, an OFDM signal is received. The OFDM signal is translated into frequency domain, wherein the translated OFDM signal has N sub-carriers noted as Y(1)-Y(N). The IQ imbalance compensation factor is generated according to the k-th sub-carrier of the translated signal Y(k), the (N−k+2)-th sub-carrier of the translated signal Y(N−k+2), and the complex conjugates thereof.

    摘要翻译: 公开了一种用于补偿IQ不平衡的方法。 首先,接收OFDM信号。 OFDM信号被转换为频域,其中被转换的OFDM信号具有标记为Y(1)-Y(N)的N个子载波。 IQ不平衡补偿因子根据转换信号Y(k)的第k个副载波,转换信号Y(N-k + 2)的第(N-k + 2)个副载波产生, ,及其复合物。

    Method for estimating and compensating IQ imbalance in OFDM systems
    14.
    发明申请
    Method for estimating and compensating IQ imbalance in OFDM systems 有权
    IQ系统估计和补偿IQ失衡的方法

    公开(公告)号:US20080279221A1

    公开(公告)日:2008-11-13

    申请号:US11797723

    申请日:2007-05-07

    IPC分类号: H04B3/10

    摘要: A method for compensating IQ imbalance is disclosed. First, an OFDM signal is received. The OFDM signal is translated into frequency domain, wherein the translated OFDM signal has N sub-carriers noted as Y(1)-Y(N). The IQ imbalance compensation factor is generated according to the k-th sub-carrier of the translated signal Y(k), the (N−k+2)-th sub-carrier of the translated signal Y(N−k+2), and the complex conjugates thereof.

    摘要翻译: 公开了一种用于补偿IQ不平衡的方法。 首先,接收OFDM信号。 OFDM信号被转换为频域,其中被转换的OFDM信号具有标记为Y(1)-Y(N)的N个子载波。 IQ不平衡补偿因子根据转换信号Y(k)的第k个副载波,转换信号Y(N-k + 2)的第(N-k + 2)个副载波产生, ,及其复合物。

    Adaptive channel estimator and adaptive channel estimation method
    15.
    发明申请
    Adaptive channel estimator and adaptive channel estimation method 有权
    自适应信道估计和自适应信道估计方法

    公开(公告)号:US20080075182A1

    公开(公告)日:2008-03-27

    申请号:US11798762

    申请日:2007-05-16

    IPC分类号: H04J11/00 H04K1/10

    摘要: An adaptive channel estimator for estimating channel frequency responses when receiving OFDM symbols. The adaptive channel estimator comprises a channel estimator and a channel tracking module. The channel estimator generates one first channel frequency response for each OFDM symbol when operated in the first mode, and generates the channel frequency responses of a second channel frequency response for every N-th OFDM symbols when operated in the second mode, wherein N is a constant integer exceeding one and j is a non-negative integer. The channel tracking module indicates a channel status, and controls the channel estimator to operate in a first mode or a second mode according to the channel status.

    摘要翻译: 一种自适应信道估计器,用于在接收OFDM符号时估计信道频率响应。 自适应信道估计器包括信道估计器和信道跟踪模块。 当在第一模式下操作时,信道估计器为每个OFDM符号生成一个第一信道频率响应,并且在第二模式下操作时,为每个第N个OFDM符号产生第二信道频率响应的信道频率响应,其中N是 超过1的常数整数,j是非负整数。 信道跟踪模块指示信道状态,并且根据信道状态控制信道估计器在第一模式或第二模式中操作。

    Guard section length detection method and system
    16.
    发明申请
    Guard section length detection method and system 有权
    保护段长度检测方法和系统

    公开(公告)号:US20080019458A1

    公开(公告)日:2008-01-24

    申请号:US11826031

    申请日:2007-07-11

    IPC分类号: H04B15/00

    摘要: A guard section length detection method detects whether a preamble signal is received. A short preamble boundary is then detected, then detecting a frame boundary and detecting a guard section length. In the step of detecting the guard section length a second matched filter capable of processing 128 point data sets is detected. Four different 128 point data sets have a distance of 8 points, 16 points, 32 points, and 64 points respectively from the frame boundary to the second matched filter. Four signal correlation values are calculated for determining the guard section length.

    摘要翻译: 保护部分长度检测方法检测是否接收到前置信号。 然后检测短的前导码边界,然后检测帧边界并检测保护段长度。 在检测保护段长度的步骤中,检测能够处理128点数据集的第二匹配滤波器。 四个不同的128点数据集分别具有从帧边界到第二匹配滤波器的8点,16点,32点和64点的距离。 计算四个信号相关值以确定防护段长度。

    CHANNEL INFORMATION FEEDBACK METHOD AND WIRELESS COMMUNICATION DEVICE USING THE SAME
    17.
    发明申请
    CHANNEL INFORMATION FEEDBACK METHOD AND WIRELESS COMMUNICATION DEVICE USING THE SAME 有权
    信道反馈方法和无线通信装置

    公开(公告)号:US20130163645A1

    公开(公告)日:2013-06-27

    申请号:US13338207

    申请日:2011-12-27

    IPC分类号: H04B7/02 H04B1/38 H04B17/00

    摘要: A channel information feedback method for multi-antenna system, and a wireless communication device using the same method are provided. The proposed method could reduce feedback overhead for multiple-input multiple-output (MIMO) wireless channel information, and is based on compressive sensing technique. Prior to sending back channel information, a receiver estimates the channel and multiplies the vectorized channel with a random matrix to generate compressed feedback content. Upon receiving the compressed feedback content at a transmitter, the channel information could be restored with signal recovery algorithms of compressive sensing technique. In the other embodiment, the proposed method further adaptively adjusts compression ratio of the compressed feedback content in accordance to the prevailing channel quality. Further, for slow-varying MIMO channels, there is proposed another channel information feedback method which switches between a fixed spasifying-basis and a signal-dependent sparsifying-basis.

    摘要翻译: 提供了一种用于多天线系统的信道信息反馈方法和使用相同方法的无线通信装置。 所提出的方法可以减少多输入多输出(MIMO)无线信道信息的反馈开销,并且基于压缩感测技术。 在发送信道信息之前,接收机估计信道并将矢量化信道与随机矩阵相乘以产生压缩反馈内容。 一旦在发射机处接收到压缩的反馈内容,可以利用压缩感测技术的信号恢复算法恢复信道信息。 在另一实施例中,所提出的方法进一步根据主流信道质量自适应地调整压缩反馈内容的压缩比。 此外,对于慢速变化的MIMO信道,提出了另一种信道信息反馈方法,其基于固定基于扩频的信号和基于信号的稀疏化。

    System and method for subcarrier allocation and permutation
    18.
    发明授权
    System and method for subcarrier allocation and permutation 有权
    子载波分配和置换的系统和方法

    公开(公告)号:US08331482B2

    公开(公告)日:2012-12-11

    申请号:US12481880

    申请日:2009-06-10

    IPC分类号: H04L27/26 H04L23/00

    摘要: A subcarrier allocation method for use by a transmitter, the transmitter being configured to, when transmitting first and second data streams, allocate pilot symbols for the first and second data streams to subcarriers, such that a first plurality of subcarriers carry the pilot symbols for the first data stream and a second plurality of subcarriers carry the pilot symbols for the second data stream. The method includes allocating, when the transmitter transmits the first data stream but does not transmit the second data stream, the second plurality of subcarriers to carry no formation or information relating to the first data stream.

    摘要翻译: 一种由发射机使用的副载波分配方法,所述发射机被配置为当发射第一和第二数据流时,将第一和第二数据流的导频符号分配给子载波,使得第一多个子载波携带用于 第一数据流和第二多个子载波携带用于第二数据流的导频符号。 该方法包括当发射机发送第一数据流但不发送第二数据流时,分配第二多个子载波,以不携带与第一数据流有关的形成或信息。

    Progressive parallel interference canceller and method and receiver thereof
    19.
    发明授权
    Progressive parallel interference canceller and method and receiver thereof 有权
    逐行并行干扰消除器及其方法和接收器

    公开(公告)号:US08331477B2

    公开(公告)日:2012-12-11

    申请号:US12554930

    申请日:2009-09-07

    IPC分类号: H04B7/02 H04L1/02

    CPC分类号: H04J11/004 H04L27/2647

    摘要: A progressive parallel interference canceller (PPIC) and a method and a receiver thereof are illustrated. The PPIC reconstructs each subchannel interference reconstruction signal through several iterations and subtracts the corresponding subchannel interference reconstruction signal from each subchannel frequency-domain reception signal to obtain a subchannel frequency-domain signal. Thereby, according to the present disclosure, inter-channel interference can be cancelled without re-performing channel coding or estimating the signal to noise ratio (SNR) or frequency offset.

    摘要翻译: 示出了逐行并行干扰消除器(PPIC)及其方法和接收器。 PPIC通过几次迭代重构每个子信道干扰重建信号,并从每个子信道频域接收信号中减去相应的子信道干扰重建信号,以获得子信道频域信号。 因此,根据本公开,可以消除信道间干扰,而不需要重新进行信道编码或估计信噪比(SNR)或频率偏移。

    Communication methods and systems having permutation schemes
    20.
    发明授权
    Communication methods and systems having permutation schemes 有权
    具有置换方案的通信方法和系统

    公开(公告)号:US08239710B2

    公开(公告)日:2012-08-07

    申请号:US12503584

    申请日:2009-07-15

    IPC分类号: G06F11/00

    摘要: A wireless communication method implemented in a communication system may include receiving a data sequence to be permuted, and obtaining information associated with the data sequence to be permuted, the information containing at least a length of the data sequence and a sampling spacing for permuting the data sequence. The method may also include identifying a first portion of the data sequence having a first number of adjacent data items, and a second portion of the data sequence having a second number of adjacent data items. The method may also include accessing the first number of data items from the first portion at the sampling spacing, and placing the accessed first number of data items into a predetermined number of sub-blocks included within a permuted data sequence to be generated based on the received data sequence. The method may further include inserting each of the second number of data items into an end position of one of the sub-blocks within the permuted data sequence, and outputting the permuted data sequence.

    摘要翻译: 在通信系统中实现的无线通信方法可以包括接收要被置换的数据序列,以及获得与要被置换的数据序列相关联的信息,所述信息至少包含数据序列的长度和用于置换数据的采样间隔 序列。 该方法还可以包括识别具有第一数量的相邻数据项的数据序列的第一部分,以及具有第二数量的相邻数据项的数据序列的第二部分。 该方法还可以包括以采样间隔从第一部分访问第一数量的数据项,以及将所访问的第一数量的数据项放入包括在经置换的数据序列内的预定数量的子块中,以基于 接收数据序列。 该方法还可以包括将第二数量的数据项中的每一个插入置换的数据序列中的一个子块的结束位置,并输出置换的数据序列。