公开(公告)号：WO2007070456A2

公开(公告)日：2007-06-21

申请号：PCT/US2006047137

申请日：2006-12-06

Applicant: INTEL CORP ,  RESHETOV ALEXANDER V ,  SOUPIKOV ALEXEI M ,  KAPUSTIN ALEXANDER D

Inventor： RESHETOV ALEXANDER V ,  SOUPIKOV ALEXEI M ,  KAPUSTIN ALEXANDER D

IPC: G06T15/50

CPC classification number: G06T15/50

Abstract: A method and apparatus for binary classification includes using signs of float values to detect different subgroups, detecting whether all entries in the group belong to the same subgroup, splitting original subgroup into uniform subgroups and classifying subgroups using array of float values. Coherency in groups of rays is detected by generating a group of rays, determining an originating point and a direction for each ray in the group, determining coherency of the group of rays and determining a group of rays as coherent as one in which all rays determined to travel in the same direction for each coordinate x, y, and z and determining a group of rays as incoherent otherwise and traversing the group of incoherent rays differently from the coherent group of rays.

Abstract translation: 用于二进制分类的方法和装置包括使用浮点值的符号来检测不同的子组，检测组中的所有条目是否属于同一个子组，将原始子组分割成均匀的子组，并使用浮点数的数组来分类子组。 通过产生一组光线，确定组中的每个射线的始发点和方向来检测射线组中的一致性，确定射线组的一致性并确定与所有射线确定的一致的光线 对于每个坐标x，y和z以相同的方向行进，并且确定一组不相干的光线，并且穿过与相干的射线组不同的非相干射线组。

公开(公告)号：WO2004086708A1

公开(公告)日：2004-10-07

申请号：PCT/RU2003/000124

申请日：2003-03-28

Applicant: INTEL CORPORATION ,  MALTSEV, Alexander A. ,  PUDEYEV, Andrey V. ,  SOUPIKOV, Alexei M. ,  TIRASPOLSKY, Sergey A.

Inventor： MALTSEV, Alexander A. ,  PUDEYEV, Andrey V. ,  SOUPIKOV, Alexei M. ,  TIRASPOLSKY, Sergey A.

IPC: H04L27/26

CPC classification number: H04L27/2675 ,  H04L7/041 ,  H04L7/10 ,  H04L27/2663 ,  H04L27/2665

Abstract: An OFDM packet is initially detected by auto-correlating short training symbols to generate an initial packet detection signal. The initial packet detection signal may be used to initiate a coarse timing synchronization process, which may use a short symbol matched filter. A coarse timing signal may be generated from at least some of the short training symbols by correlating sampled short training symbols with short filter matched coefficients. The coarse-timing signal may be used to initiate the operation of a fine timing synchronization process, which may use a long symbol matched filter. A fine timing signal may be generated from at least some of the long training symbols by correlating sampled long training symbols with long filter-matched coefficients. The fine timing signal may be used to initiate channel estimation by performing a Fast Fourier Transform (FFT) operation on the long training symbols. The fine timing signal may also be used to initiate data signal processing using the channel estimation and may include starting an FFT operation on data symbols.

Abstract translation: 最初通过自动相关短训练符号来检测OFDM分组，以产生初始分组检测信号。 初始分组检测信号可以用于发起可以使用短符号匹配滤波器的粗略定时同步过程。 通过将采样的短训练符号与短的滤波器匹配系数相关联，可以从至少一些短训练符号生成粗定时信号。 粗定时信号可以用于启动精细定时同步过程的操作，其可以使用长符号匹配滤波器。 通过将采样的长训练符号与长滤波器匹配系数相关联，可以从至少一些长训练符号生成精细定时信号。 精细定时信号可以用于通过对长训练符号执行快速傅里叶变换（FFT）操作来启动信道估计。 精细定时信号也可以用于使用信道估计来启动数据信号处理，并且可以包括对数据符号开始FFT操作。

公开(公告)号：WO2007070456A3

公开(公告)日：2007-06-21

申请号：PCT/US2006/047137

申请日：2006-12-06

Applicant: INTEL CORPORATION ,  RESHETOV, Alexander, V. ,  SOUPIKOV, Alexei, M. ,  KAPUSTIN, Alexander, D.

Inventor： RESHETOV, Alexander, V. ,  SOUPIKOV, Alexei, M. ,  KAPUSTIN, Alexander, D.

IPC: G06T15/00

Abstract: A method and apparatus for binary classification includes using signs of float values to detect different subgroups, detecting whether all entries in the group belong to the same subgroup, splitting original subgroup into uniform subgroups and classifying subgroups using array of float values. Coherency in groups of rays is detected by generating a group of rays, determining an originating point and a direction for each ray in the group, determining coherency of the group of rays and determining a group of rays as coherent as one in which all rays determined to travel in the same direction for each coordinate x, y, and z and determining a group of rays as incoherent otherwise and traversing the group of incoherent rays differently from the coherent group of rays.

公开(公告)号：WO2004086710A1

公开(公告)日：2004-10-07

申请号：PCT/RU2003/000126

申请日：2003-03-28

Applicant: INTEL CORPORATION ,  MALTSEV, Alexander A. ,  PUDEYEV, Andrey, V. ,  SOUPIKOV, Alexei, M. ,  AKHMETOV, Dmitry V.

Inventor： MALTSEV, Alexander A. ,  PUDEYEV, Andrey, V. ,  SOUPIKOV, Alexei, M. ,  AKHMETOV, Dmitry V.

IPC: H04L27/26

CPC classification number: H04L27/266 ,  H04L27/2659 ,  H04L27/2675

Abstract: An orthogonal frequency division multiplexed (OFDM) receiver achieves improved frequency synchronization by generating a fine frequency offset of an OFDM packet with a two-channel frequency offset estimation scheme. Concurrent autocorrelations are performed with training symbols delayed by one and two durations of the training symbols. The respective correlation outputs are integrated over one and a half durations and one half duration to generate phase shift estimates. The phase shift estimates are weighted and combined to generate the fine frequency offset estimate which is used to rotate the phase of OFDM data symbols prior to performing a Fast Fourier Transform (FFT) on the data symbols.

Abstract translation: 正交频分复用（OFDM）接收机通过利用双信道频偏估计方案生成OFDM分组的精细频率偏移来实现改进的频率同步。 训练符号延时一个和两个持续时间的训练符号执行并发自相关。 相应的相关输出在一个半持续时间和一半的时间内被积分以产生相移估计。 相移估计被加权并组合以产生精细频率偏移估计，其用于在对数据符号执行快速傅里叶变换（FFT）之前旋转OFDM数据符号的相位。

公开(公告)号：WO2004086709A1

公开(公告)日：2004-10-07

申请号：PCT/RU2003/000125

申请日：2003-03-28

Applicant: INTEL CORPORATION ,  MALTSEV, Alexander A. ,  RUBTSOV, Alexy, E. ,  SOUPIKOV, Alexei, M.

Inventor： MALTSEV, Alexander A. ,  RUBTSOV, Alexy, E. ,  SOUPIKOV, Alexei, M.

IPC: H04L27/26

CPC classification number: H04L27/2657 ,  H04L27/2675 ,  H04L27/2695

Abstract: An OFDM receiver applies phase compensation to subcarriers of data symbols of an OFDM packet. A phase compensation estimate is generated from pilot subcarriers within the data symbol and applied to the subcarriers of the data symbol prior to demapping. The pilot subcarriers of the data symbol are combined and weighted to generate an observation vector. Recursive filtering is performed on the observation vector to generate the phase compensation estimate. The recursive filtering may include performing an extended Kalman-type filtering (EKF) operation on the observation vector using a channel estimate, an additive noise power estimate, a signal to noise ratio (SNR) estimate and a priori information about a dynamic model of the phase noise spectrum of transceiver oscillators. The channel estimate may be generated from a long training symbol of the OFDM packet, and the additive noise power estimate and the SNR estimate may be generated from short training symbols of the OFDM packet.

Abstract translation: OFDM接收机对OFDM分组的数据符号的子载波进行相位补偿。 从数据符号内的导频子载波产生相位补偿估计，并将其应用于解映射之前的数据符号的子载波。 数据符号的导频子载波被组合和加权以产生观测向量。 对观测向量进行递归滤波，生成相位补偿估计。 递归滤波可以包括使用信道估计，加性噪声功率估计，信噪比（SNR）估计和有关动态模型的先验信息对观测向量执行扩展卡尔曼型滤波（EKF）操作 收发器振荡器的相位噪声谱。 可以从OFDM分组的长训练符号生成信道估计，并且可以从OFDM分组的短训练符号生成加性噪声功率估计和SNR估计。