Methods for Selecting a Coarse Frequency Offset Estimation for an Orthogonal Frequency Division Multiplexing Modulated Signal
    1.
    发明申请
    Methods for Selecting a Coarse Frequency Offset Estimation for an Orthogonal Frequency Division Multiplexing Modulated Signal 有权
    用于选择正交频分复用调制信号的粗频偏移估计的方法

    公开(公告)号:US20080260056A1

    公开(公告)日:2008-10-23

    申请号:US12103698

    申请日:2008-04-15

    IPC分类号: H04L27/28

    摘要: The present invention provides methods for selecting the coarse frequency offset estimation in an orthogonal frequency division multiplexing system that may include: searching within a predefined subset for a set of frequency offset candidates; selectively searching outside the predefined subset for additional frequency offset candidates; and combining one or more ICDC method and CIR based method to select the coarse frequency offset.

    摘要翻译: 本发明提供了用于在正交频分复用系统中选择粗频偏估计的方法,所述正交频分复用系统可以包括:在预定义子集内搜索一组频偏候选; 选择性地在预定义子集之外搜索额外的频率偏移候选; 并组合一个或多个ICDC方法和基于CIR的方法来选择粗频偏移。

    Quasi-block diagonal low-density parity-check code for MIMO systems
    2.
    发明申请
    Quasi-block diagonal low-density parity-check code for MIMO systems 审中-公开
    用于MIMO系统的准块对角低密度奇偶校验码

    公开(公告)号:US20050268202A1

    公开(公告)日:2005-12-01

    申请号:US10857042

    申请日:2004-05-28

    摘要: A method codes multiple data streams in multiple-input, multiple-output communications systems. In a transmitter, an input bitstream is encoded as codewords b in multiple layers. Each layer is modulated. A quasi-block diagonal, low-density parity-check code is applied to each layer, the quasi-block diagonal, parity-check code being a matrix H, the matrix H including one row of blocks for each subcode, and one row of blocks for each layer such that Hb=0 for any valid codeword. The layers are then forwarded to transmit antennas as a transmitted signal x.

    摘要翻译: 一种方法在多输入多输出通信系统中对多个数据流进行编码。 在发射机中,输入比特流被编码为多层的码字b。 每层调制。 准块对角线,低密度奇偶校验码被应用于每个层,准块对角线,奇偶校验码是矩阵H,矩阵H包括每个子码的一行块,以及一行 每个层的块,使得对于任何有效的码字,Hb = 0。 然后将层转发到发射天线作为发射信号x。

    Methods for selecting a coarse frequency offset estimation for an orthogonal frequency division multiplexing modulated signal
    3.
    发明授权
    Methods for selecting a coarse frequency offset estimation for an orthogonal frequency division multiplexing modulated signal 有权
    用于选择正交频分复用调制信号的粗频偏估计的方法

    公开(公告)号:US08023597B2

    公开(公告)日:2011-09-20

    申请号:US12103698

    申请日:2008-04-15

    IPC分类号: H04L27/06

    摘要: The present invention provides methods for selecting the coarse frequency offset estimation in an orthogonal frequency division multiplexing system that may include: searching within a predefined subset for a set of frequency offset candidates; selectively searching outside the predefined subset for additional frequency offset candidates; and combining one or more ICDC method and CIR based method to select the coarse frequency offset.

    摘要翻译: 本发明提供了用于在正交频分复用系统中选择粗频偏估计的方法,所述正交频分复用系统可包括:在预定义子集内搜索一组频偏候选; 选择性地在预定义子集之外搜索额外的频率偏移候选; 并组合一个或多个ICDC方法和基于CIR的方法来选择粗频偏移。

    Methods for PRS-Based Symbol Timing Adjustment for OFDM Systems
    4.
    发明申请
    Methods for PRS-Based Symbol Timing Adjustment for OFDM Systems 审中-公开
    OFDM系统基于PRS的符号定时调整方法

    公开(公告)号:US20090110135A1

    公开(公告)日:2009-04-30

    申请号:US12258362

    申请日:2008-10-24

    IPC分类号: H04L7/00

    摘要: This invention relates to methods for determining symbol timing shift for a received signal, comprising the steps of: demodulating a received signal; removing a phase reference sequence from the demodulated signal to generate a channel frequency response; converting said channel frequency response to the time domain to generate a channel impulse response; determining a detection threshold; determining a first path and a last path as a function of the detection threshold; and calculating a timing shift as a function of the first path and the last path.

    摘要翻译: 本发明涉及用于确定接收信号的符号定时偏移的方法,包括以下步骤:解调所接收的信号; 从解调信号中去除相位参考序列以产生信道频率响应; 将所述信道频率响应转换成时域以产生信道脉冲响应; 确定检测阈值; 确定作为所述检测阈值的函数的第一路径和最后路径; 以及计算作为所述第一路径和所述最后路径的函数的定时偏移。

    Methods for Soft Bit Companding for Time De-interleaving of Digital Signals
    5.
    发明申请
    Methods for Soft Bit Companding for Time De-interleaving of Digital Signals 审中-公开
    用于数字信号时间去交织的软比特压缩方法

    公开(公告)号:US20090103601A1

    公开(公告)日:2009-04-23

    申请号:US12253919

    申请日:2008-10-17

    申请人: Jianxuan Du Yue Chen

    发明人: Jianxuan Du Yue Chen

    IPC分类号: H04B1/66

    摘要: This invention provides methods for reducing the bit width of soft information, while maintaining a large dynamic range by applying compression and expansion. In particular, this invention provides methods for time de-interleaving of soft information, comprising the steps of: quantizing the soft information into a first soft information having a first pre-defined number of bits; compressing the first soft information into a second soft information having a second pre-defined number of bits; time de-interleaving the second soft information; and decompressing the time de-interleaved second soft information.

    摘要翻译: 本发明提供了通过应用压缩和扩展来保持较大动态范围的方式来减少软信息的位宽度。 具体地,本发明提供了用于软信息的时间去交织的方法,包括以下步骤:将软信息量化为具有第一预定位数的第一软信息; 将第一软信息压缩成具有第二预定位数的第二软信息; 时间去交织第二软信息; 并解压缩时间去交织的第二软信息。

    Minimizing feedback rate for channel state information in MIMO systems
    6.
    发明授权
    Minimizing feedback rate for channel state information in MIMO systems 有权
    最小化MIMO系统中信道状态信息的反馈速率

    公开(公告)号:US07359470B2

    公开(公告)日:2008-04-15

    申请号:US10939284

    申请日:2004-09-10

    IPC分类号: H04L7/02

    CPC分类号: H04L1/0687

    摘要: A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.

    摘要翻译: 一种方法使在多输入多输出通信系统中将信道状态信息从接收机反馈到发射机的速率最小化。 确定发射机和接收机之间的信道的时间自相关函数。 估计通道的空间协方差信息。 然后,从接收机向发射机反馈信道状态信息的最小速率基于实际信道状态信息和估计的空间协方差信息和时间自相关函数。

    Training frames for MIMO stations
    7.
    发明申请
    Training frames for MIMO stations 失效
    MIMO站的训练帧

    公开(公告)号:US20060274847A1

    公开(公告)日:2006-12-07

    申请号:US11127006

    申请日:2005-05-11

    IPC分类号: H04L1/02

    摘要: A method transmits transmitting training frames in a MIMO system. A long sequence of training frames is transmitted from a station B to a station A via a channel of the MIMO system, in which the station A includes NA antennas and N—SS RF chains and the station B includes NB antennas and NB—SS RF chains, and a number of frames in the long sequence of training frames is at least equal to A short sequence of training frames is transmitted from the station A to the station B via the channel in response to receiving the long sequence of training frames. A number of frames in the short training sequence is at least equal to

    摘要翻译: 一种在MIMO系统中发送训练帧的方法。 训练帧的长序列经由MIMO系统的信道从站B发送到站A,其中,站A包括NA天线,并且N - SUB> SS RF链,并且站B包括N个B个天线和N B个天线,并且N B个< SUB> SS RF链,并且训练帧的长序列中的多个帧至少等于A响应于接收,经由信道从站A向站B发送短序列的训练帧 训练框架的长序列。 短训练序列中的多个帧至少等于

    Methods for Modified Signal Acquisition for OFDM Schemes
    8.
    发明申请
    Methods for Modified Signal Acquisition for OFDM Schemes 审中-公开
    OFDM方案修改信号采集方法

    公开(公告)号:US20090103667A1

    公开(公告)日:2009-04-23

    申请号:US12253927

    申请日:2008-10-17

    IPC分类号: H04L27/06

    摘要: This invention relates to methods for determining coarse symbol timing and mode detection by using CP correlation-based techniques. In particular, this invention relates to methods for determining symbol timing, frame timing, and system mode for signal acquisition, comprising the steps of: detecting symbol timing and system mode based on cyclic prefix correlation; and determining a null symbol as a function of a pre-defined number of consecutive symbols and using said null symbol to determine frame timing.

    摘要翻译: 本发明涉及通过使用基于CP相关的技术来确定粗符号定时和模式检测的方法。 具体地说,本发明涉及用于确定信号采集的符号定时,帧定时和系统模式的方法,包括以下步骤:基于循环前缀相关检测符号定时和系统模式; 以及确定作为预定数量的连续符号的函数的空符号,并且使用所述空符号来确定帧定时。

    Training frames for MIMO stations
    9.
    发明授权
    Training frames for MIMO stations 失效
    MIMO站的训练帧

    公开(公告)号:US07486720B2

    公开(公告)日:2009-02-03

    申请号:US11127006

    申请日:2005-05-11

    IPC分类号: H04B1/38 H04B7/02 H04L27/00

    摘要: A method transmits training frames in a MIMO system. A long sequence of training frames is transmitted from a station B to a station A via a channel of the MIMO system, in which the station A includes NA antennas and NA—SS RF chains and the station B includes NB antennas and NB—SS RF chains, and a number of frames in the long sequence of training frames is at least equal to where is a lower bound operator. A short sequence of training frames is transmitted from the station A to the station B via the channel in response to receiving the long sequence of training frames. A number of frames in the short training sequence is at least equal to

    摘要翻译: 一种方法在MIMO系统中发送训练帧。 训练帧的长序列经由MIMO系统的信道从站B发送到站A,其中站A包括NA天线和NA SS-射频链,并且站B包括 NB天线和NB SS RF链,并且训练帧的长序列中的多个帧至少等于下界运算符的位置。 响应于接收到长的训练帧序列,经由信道将短序列的训练帧从站A发送到站B. 短训练序列中的多个帧至少等于

    Minimizing feedback rate for channel state information in MIMO systems
    10.
    发明申请
    Minimizing feedback rate for channel state information in MIMO systems 有权
    最小化MIMO系统中信道状态信息的反馈速率

    公开(公告)号:US20060056533A1

    公开(公告)日:2006-03-16

    申请号:US10939284

    申请日:2004-09-10

    IPC分类号: H04L1/02

    CPC分类号: H04L1/0687

    摘要: A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.

    摘要翻译: 一种方法使在多输入多输出通信系统中将信道状态信息从接收机反馈到发射机的速率最小化。 确定发射机和接收机之间的信道的时间自相关函数。 估计通道的空间协方差信息。 然后,从接收机向发射机反馈信道状态信息的最小速率基于实际信道状态信息和估计的空间协方差信息和时间自相关函数。