公开(公告)号：US07826544B2

公开(公告)日：2010-11-02

申请号：US11824600

申请日：2007-06-29

申请人： Eyal Bick ,  Uri Perlmutter

发明人： Eyal Bick ,  Uri Perlmutter

IPC分类号： H04K1/10

CPC分类号： H04L27/2662 ,  H04L27/266 ,  H04L27/2678

摘要： In general, in one aspect, the disclosure describes a method defining order and means in which physical parameters of a received OFDM signal may be detected. A fractional frequency offset is determined for the OFDM signal and is used to determine a coarse location for received signal preamble. A symbol boundary is determined based on the coarse location and the course location is used to determine preamble location. A preamble sequence and integer frequency offset is determined based on the preamble location.

摘要翻译： 通常，在一个方面，本公开描述了定义可以检测接收的OFDM信号的物理参数的顺序和装置的方法。 确定OFDM信号的分数频偏，并用于确定接收信号前同步码的粗略位置。 基于粗略位置确定符号边界，并且使用路线位置来确定前导码位置。 基于前导码位置确定前导码序列和整数频率偏移。

公开(公告)号：US07606139B2

公开(公告)日：2009-10-20

申请号：US11635886

申请日：2006-12-08

申请人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

发明人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

IPC分类号： H04J11/00

CPC分类号： H04L27/2656 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2605 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2686

摘要： A method for detecting a preamble location in a multiple preamble OFDM (Orthogonal Frequency Division Multiplexing) system is disclosed. An OFDM signal is generated with a plurality of frames, and each of the frames includes symbols and a predetermined preamble symbol. A maximum FDDC (Frequency Domain Differential Correlator) value is computed for each of the symbols in some of the frames. The preamble location in a frame is determined by summing the maximum FDDC value for each symbol at a same frame location in consecutive frames of the OFDM signal.

摘要翻译： 公开了一种用于检测多前同步码OFDM（正交频分复用）系统中的前导码位置的方法。 利用多个帧生成OFDM信号，并且每个帧包括符号和预定的前导码符号。 对于一些帧中的每个符号计算最大FDDC（频域差分相关器）值。 通过在OFDM信号的连续帧中的相同帧位置处对每个符号的最大FDDC值求和来确定帧中的前导码位置。

公开(公告)号：US07843872B2

公开(公告)日：2010-11-30

申请号：US11796956

申请日：2007-04-30

申请人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

发明人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

IPC分类号： H04W4/00

CPC分类号： H04L25/022 ,  H04L25/0228 ,  H04W36/30

摘要： Methods and arrangements for wireless communications are described. Embodiments include transformations, code, state machines or other logic to receive from a transmitter a signal representing a known sequence of symbols. The signal may be transmitted over a plurality of sub channels. The embodiments may also include determining channel responses at the sub channels and determining a reception of the known sequence. The determining may include treating the channel responses at the sub channels in a differential manner to cancel out channel phase responses and obtain channel amplitudes. In some embodiments, the cancelling may be performed by multiplying frequency domain values representing reception of a sub channel by the complex conjugate of frequency domain values of a neighboring sub channel. Many embodiments may also include calculating a carrier to interference and noise ratio (CINR) of the signal. In several embodiments, the signal may represent the preamble of a wireless frame.

摘要翻译： 描述无线通信的方法和布置。 实施例包括转换，代码，状态机或用于从发射机接收表示已知符号序列的信号的其他逻辑。 信号可以在多个子信道上发送。 实施例还可以包括确定子信道处的信道响应并确定已知序列的接收。 确定可以包括以差分方式处理子信道处的信道响应以消除信道相位响应并获得信道幅度。 在一些实施例中，可以通过将表示子信道的接收的频域值乘以相邻子信道的频域值的复共轭来执行抵消。 许多实施例还可以包括计算信号的载波与干扰和噪声比（CINR）。 在几个实施例中，信号可以表示无线帧的前同步码。

公开(公告)号：US20080267059A1

公开(公告)日：2008-10-30

申请号：US11796956

申请日：2007-04-30

申请人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

发明人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

IPC分类号： H04J11/00 ,  H03D1/00 ,  H04B1/00 ,  H04B7/00

CPC分类号： H04L25/022 ,  H04L25/0228 ,  H04W36/30

摘要： Methods and arrangements for wireless communications are described. Embodiments include transformations, code, state machines or other logic to receive from a transmitter a signal representing a known sequence of symbols. The signal may be transmitted over a plurality of sub channels. The embodiments may also include determining channel responses at the sub channels and determining a reception of the known sequence. The determining may include treating the channel responses at the sub channels in a differential manner to cancel out channel phase responses and obtain channel amplitudes. In some embodiments, the cancelling may be performed by multiplying frequency domain values representing reception of a sub channel by the complex conjugate of frequency domain values of a neighboring sub channel. Many embodiments may also include calculating a carrier to interference and noise ratio (CINR) of the signal. In several embodiments, the signal may represent the preamble of a wireless frame.

摘要翻译： 描述无线通信的方法和布置。 实施例包括转换，代码，状态机或用于从发射机接收表示已知符号序列的信号的其他逻辑。 信号可以在多个子信道上发送。 实施例还可以包括确定子信道处的信道响应并确定已知序列的接收。 确定可以包括以差分方式处理子信道处的信道响应以消除信道相位响应并获得信道幅度。 在一些实施例中，可以通过将表示子信道的接收的频域值乘以相邻子信道的频域值的复共轭来执行抵消。 许多实施例还可以包括计算信号的载波与干扰和噪声比（CINR）。 在几个实施例中，信号可以表示无线帧的前同步码。

公开(公告)号：US20090003471A1

公开(公告)日：2009-01-01

申请号：US11824600

申请日：2007-06-29

申请人： Eyal Bick ,  Uri Perlmutter

发明人： Eyal Bick ,  Uri Perlmutter

IPC分类号： H04L27/28

CPC分类号： H04L27/2662 ,  H04L27/266 ,  H04L27/2678

摘要： In general, in one aspect, the disclosure describes a method defining order and means in which physical parameters of a received OFDM signal may be detected. A fractional frequency offset is determined for the OFDM signal and is used to determine a coarse location for received signal preamble. A symbol boundary is determined based on the coarse location and the course location is used to determine preamble location. A preamble sequence and integer frequency offset is determined based on the preamble location.

摘要翻译： 通常，在一个方面，本公开描述了定义可以检测接收的OFDM信号的物理参数的顺序和装置的方法。 确定OFDM信号的分数频偏，并用于确定接收信号前同步码的粗略位置。 基于粗略位置确定符号边界，并且使用路线位置来确定前导码位置。 基于前导码位置确定前导码序列和整数频率偏移。

公开(公告)号：US20080137527A1

公开(公告)日：2008-06-12

申请号：US11635886

申请日：2006-12-08

申请人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

发明人： Eyal Bick ,  Uri Perlmutter ,  Yuval Lomnitz

IPC分类号： H04J11/00 ,  H04L27/28

CPC分类号： H04L27/2656 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2605 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2686

摘要： A method for detectable a pre-amble location in a multiple preamble OFDM (Orthogonal Frequency Division Multiplexing) system is disclosed. An OFDM signal is generated with a plurality of frames, and each of the frames includes symbols and a predetermined preamble symbol. A maximum FDDC (Frequency Domain Differential Correlator) value is computed for each of the symbols in some of the frames. The pre-amble location in a frame is determined by summing the maximum FDDC value for each symbol at a same frame location in consecutive frames of the OFDM signal.

摘要翻译： 公开了一种在多前同步码OFDM（正交频分复用）系统中可检测前同步码头位置的方法。 利用多个帧生成OFDM信号，并且每个帧包括符号和预定的前导码符号。 对于一些帧中的每个符号计算最大FDDC（频域差分相关器）值。 通过在OFDM信号的连续帧中的相同帧位置处对每个符号的最大FDDC值求和来确定帧中的前同步码头位置。