公开(公告)号：WO2011010180A1

公开(公告)日：2011-01-27

申请号：PCT/IB2009/006321

申请日：2009-07-22

Applicant: THOMSON LICENSING ,  ZHOU, Wei ,  ZOU, Li

Inventor： ZHOU, Wei ,  ZOU, Li

IPC: H04L25/03 ,  H04L27/34 ,  H04L27/38 ,  H04L1/00 ,  H03M13/25

CPC classification number: H03M13/1171 ,  H03M13/255 ,  H04L1/0057 ,  H04L1/06 ,  H04L25/03171 ,  H04L27/2627 ,  H04L27/2649 ,  H04L27/3405 ,  H04L27/38 ,  H04L2025/03611

Abstract: Methods and apparatus for non-binary, low density parity check coding are disclosed. The inventive methods comprise encoding the signal with a low density parity check code, rotating a component of the coded signal, delaying the rotated component, and interleaving symbols associated with the rotated and delayed components of the signal.

Abstract translation: 公开了用于非二进制，低密度奇偶校验编码的方法和装置。 本发明的方法包括用低密度奇偶校验码对信号进行编码，旋转编码信号的分量，延迟旋转的分量，以及交织与信号的旋转和延迟分量相关联的符号。

公开(公告)号：WO2009040623A3

公开(公告)日：2009-05-22

申请号：PCT/IB2008002448

申请日：2008-09-19

Applicant: THOMSON LICENSING ,  LIU PENG ,  ZOU LI

Inventor： LIU PENG ,  ZOU LI

IPC: H04L25/02 ,  H04L27/26

CPC classification number: H04L25/0232 ,  H04L25/0204 ,  H04L25/0216 ,  H04L27/2647

Abstract: A Digital Video Broadcasting-Terrestrial/Handheld (DVB-T/H) receiver comprises a controller and a frequency interpolator for use in estimating channel state information (CSI) information of a received signal by frequency interpolation. The controller determines a multi-path delay (Tmax) for the received signal and adjusts the bandwidth of the frequency interpolator as a function of the determined multi-path delay. For example, when the multi- path delay is small, the bandwidth of the frequency interpolator is adjusted to be smaller than the bandwidth of the frequency interpolator when the multi-path delay is large. In addition, the controller may also change the coefficients of the frequency interpolator such that different word lengths are used for the coefficients as a function of the determined multi-path delay.

Abstract translation: 数字视频广播 - 地面/手持（DVB-T / H）接收机包括控制器和频率插值器，用于通过频率插值来估计接收信号的信道状态信息（CSI）信息。 控制器确定接收信号的多径延迟（Tmax），并根据确定的多径延迟调整频率插值器的带宽。 例如，当多径延迟小时，当多路径延迟较大时，频率插值器的带宽被调整为小于频率插值器的带宽。 此外，控制器还可以改变频率内插器的系数，使得不同的字长度被用作系数，作为确定的多径延迟的函数。

公开(公告)号：WO2009044256A1

公开(公告)日：2009-04-09

申请号：PCT/IB2008/002584

申请日：2008-10-01

Applicant: THOMSON LICENSING ,  LIU, Dun ,  ZOU, Li

Inventor： LIU, Dun ,  ZOU, Li

IPC: H04L27/26 ,  H04L25/02

CPC classification number: H04L25/0232 ,  H04L25/0216 ,  H04L25/022 ,  H04L27/2601

Abstract: A method and apparatus for channel estimation is described. The method (400) includes receiving (420) an OFDM signal containing pilot sub-carriers, calculating (440) a transmission channel response based on the pilot sub-carriers, deriving (450) a time delay characteristic based on the transmission channel response, and selecting (470) interpolation filter coefficients in response to determining the maximum delay due to the channel response. The apparatus (200) includes an extraction block (220) for separating sub-carriers containing reference data and for determining the effect of the transmission channel on the separated sub- carriers, an interpolation circuit (230) for outputting an estimate of the effect of the transmission channel, and a controller (250) for altering the characteristics of the interpolation circuit (230) in response to the effect of the transmission channel.

Abstract translation: 描述了用于信道估计的方法和装置。 方法（400）包括接收（420）包含导频子载波的OFDM信号，基于导频子载波计算（440）传输信道响应，基于传输信道响应导出（450）延时特性， 以及响应于确定由于所述信道响应引起的最大延迟来选择（470）内插滤波器系数。 所述装置（200）包括用于分离包含参考数据的子载波并用于确定所述传输信道对所述分离的子载波的影响的提取块（220），用于输出对所述参考数据的影响的估计的内插电路（230） 传输信道，以及用于响应于传输信道的影响而改变内插电路（230）的特性的控制器（250）。

公开(公告)号：WO2009009929A1

公开(公告)日：2009-01-22

申请号：PCT/CN2007/002200

申请日：2007-07-19

Applicant: THOMSON LICENSING ,  ZOU, Li ,  YANG, Shenghao

Inventor： ZOU, Li ,  YANG, Shenghao

IPC: H04L9/28

CPC classification number: H04L9/065 ,  H04L27/2626 ,  H04L27/2647

Abstract: An encryption method comprises a multi-carrier modulation, and includes carrying out a permutation step in which an encrypting permutation operation is applied to input data according to an encryption key, and feeding the permuted data to an Inverse Fourier Transform (IFT) component (502) for performance of an IFT or part of an IFT associated with the multi-carrier modulation.

Abstract translation: 一种加密方法包括多载波调制，并且包括执行置换步骤，其中根据加密密钥将加密置换操作应用于输入数据，并将置换的数据馈送到逆傅里叶变换（IFT）分量（502） ），用于执行与多载波调制相关联的IFT或部分IFT。

公开(公告)号：WO2008089596A1

公开(公告)日：2008-07-31

申请号：PCT/CN2007/000208

申请日：2007-01-19

Applicant: THOMSON LINCENSING ,  WU, Yiling ,  ZOU, Li ,  LIU, Peng

Inventor： WU, Yiling ,  ZOU, Li ,  LIU, Peng

IPC: H04J11/00 ,  H04L25/02

CPC classification number: H04L25/0232 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/0226 ,  H04L27/2601

Abstract: The present invention provides an interpolating method for an OFDM system, a channel estimation method and apparatus, in which each OFDM symbol has scattered pilots inserted, and the interpolating method comprising: the step (S602) of inserting at least one copy of the first scattered pilot in each OFDM symbol before the first scattered pilot as virtual pilots, and inserting at least one copy of the last scattered pilot in each OFDM symbol behind the last scattered pilot as virtual pilots, after obtaining the channel state information on the sub channels which propagate the scattered pilots in the OFDM symbols by linear filtering; and the step (S604) of performing interpolation by a FIR filter with the channel state information.

Abstract translation: 本发明提供了一种用于OFDM系统的内插方法，信道估计方法和装置，其中每个OFDM符号具有插入的散射导频，并且所述内插方法包括：步骤（S602），插入第一分散的至少一个副本 在第一分散导频之前的每个OFDM符号中导频作为虚拟导频，并且在获得在传播的子信道上的信道状态信息之后，将最后分散导频后面的每个OFDM符号中的最后分散导频的至少一个拷贝插入虚拟导频 通过线性滤波在OFDM符号中的散射导频; 以及通过具有信道状态信息的FIR滤波器进行插值的步骤（S604）。

公开(公告)号：WO2008089595A1

公开(公告)日：2008-07-31

申请号：PCT/CN2007/000207

申请日：2007-01-19

Applicant: THOMSON LOCENSING ,  WU, Yiling ,  ZOU, Li ,  LIU, Dun

Inventor： WU, Yiling ,  ZOU, Li ,  LIU, Dun

IPC: H04L27/26

CPC classification number: H04L25/0212 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/023 ,  H04L25/0232 ,  H04L27/2647

Abstract: A time domain interpolation method for channel estimation under Doppler channels in a multi-carrier system comprises the steps of: dividing the received data into scattered pilots and non-scattered pilots to get the CSI of the scattered pilots; and implementing an interpolation to get the CSI of the non-scattered pilots. Implementing the interpolation comprises the steps of: sorting the non-scattered pilots into a first type pilots capable of being estimated by predicting; and a second type pilots capable of being estimated by filtering; estimating the CSI of the first type pilots by predicting; and estimating the CSI of the second type pilots by filtering. A time domain interpolation apparatus comprises a separation unit, a division unit, and an interpolation unit. The interpolation unit comprises a sorting unit, a predicting unit, and a filtering unit. This apparatus can achieve the balance between performance and hardware cost.

Abstract translation: 一种多载波系统中多普勒信道下信道估计的时域插值方法，包括以下步骤：将接收到的数据划分为散射导频和非散射导频，得到散射导频的CSI ; 并进行插值得到非散射飞行员的CSI。 实现插值包括以下步骤：将非分散导频分类为能够通过预测进行估计的第一类导频; 以及能够通过滤波来估计的第二类型导频; 通过预测来估计第一类型飞行员的CSI; 以及通过滤波来估计第二类型导频的CSI。 时域插值装置包括分离单元，分割单元和插值单元。 内插单元包括分类单元，预测单元和过滤单元。 该设备可以实现性能和硬件成本之间的平衡。

公开(公告)号：WO2011016835A1

公开(公告)日：2011-02-10

申请号：PCT/US2010/002040

申请日：2010-07-20

Applicant: THOMSON LICENSING ,  ZHOU, Wei ,  ZOU, Li ,  ZHAO, Yuping ,  ZHANG, Xiaoxin ,  LIU, Peng ,  WANG, Charles Chuanming

Inventor： ZHOU, Wei ,  ZOU, Li ,  ZHAO, Yuping ,  ZHANG, Xiaoxin ,  LIU, Peng ,  WANG, Charles Chuanming

IPC: H04L27/34 ,  H04L27/38 ,  H03M13/11 ,  H04L1/00 ,  H03M13/25 ,  H04L27/36 ,  H04L27/26

CPC classification number: H04L27/3488 ,  H03M13/1171 ,  H03M13/15 ,  H03M13/1515 ,  H03M13/255 ,  H03M13/2732 ,  H03M13/2906 ,  H03M13/356 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/0071 ,  H04L27/2626 ,  H04L27/3405 ,  H04L27/36

Abstract: Modern coding and modulation techniques have greatly improved the transmission of signals. A method is described including receiving a stream of data bits, demultiplexing the stream into a first and second substream, encoding the first and second substream using a low density parity check coding process, and mapping the first substream to a first region of a symbol constellation map and the second substream to a second region. Also, an apparatus is described including a demultiplexer (210) that produces a first and second substream, a first encoder (220) that encodes the first substream using a low density parity check coding process at a first encoding rate, a second encoder (222) that encodes the second substream at a second rate, and a symbol mapper (240) that maps bits from the first substream to a first region of a symbol constellation map and maps bits from the second substream to a second region.

Abstract translation: 现代编码和调制技术大大提高了信号的传输。 描述了一种方法，包括接收数据比特流，将流解复用为第一和第二子流，使用低密度奇偶校验编码过程对第一和第二子流进行编码，以及将第一子流映射到符号星座的第一区域 将第二子流映射到第二区域。 另外，描述了一种包括产生第一和第二子流的解复用器（210）的装置，以第一编码速率使用低密度奇偶校验编码处理对第一子流进行编码的第一编码器（220），第二编码器 ），以第二速率对第二子流编码的符号映射器（240），其将来自第一子流的比特映射到符号星座图的第一区域，并将来自第二子流的比特映射到第二区域。

公开(公告)号：WO2010073095A1

公开(公告)日：2010-07-01

申请号：PCT/IB2009/007838

申请日：2009-12-21

Applicant: THOMSON LICENSING ,  DU, Yongjiu ,  LIU, Peng ,  ZOU, Li

Inventor： DU, Yongjiu ,  LIU, Peng ,  ZOU, Li

IPC: H04J3/06 ,  H04L27/26

CPC classification number: H04L27/2656 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/2675

Abstract: A method for detection of frame timing error in a system in which a pseudorandom number sequence has been added to a transmitted signal is set out. It is applicable to Orthogonal Frequency Division Multiplexing systems.

Abstract translation: 提出了在发送信号中添加了伪随机数序列的系统中检测帧定时误差的方法。 适用于正交频分复用系统。

公开(公告)号：WO2009156828A1

公开(公告)日：2009-12-30

申请号：PCT/IB2009/006041

申请日：2009-06-24

Applicant: THOMSON LICENSING ,  ZHOU, Wei ,  ZOU, Li ,  ZHAO, Yuping ,  ZHANG, Xiaoxin

Inventor： ZHOU, Wei ,  ZOU, Li ,  ZHAO, Yuping ,  ZHANG, Xiaoxin

IPC: H03M13/25

CPC classification number: H03M13/256 ,  H03M13/1171 ,  H03M13/253 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L27/3416 ,  H04L27/38

Abstract: A concatenated coded modulation communication system and method combines Trellis Coded Modulation with non-Gray code constellation mapping, interleaving, and non-binary Low Density Parity Check coded channel modulation with Gray code constellation mapping to improve error performance.

Abstract translation: 串联编码调制通信系统和方法将格雷码编码调制与非格雷码组合映射，交错和非二进制低密度奇偶校验编码信道调制与格雷码星座映射相结合，以改善误码性能。

公开(公告)号：WO2009106957A1

公开(公告)日：2009-09-03

申请号：PCT/IB2009/000345

申请日：2009-02-24

Applicant: THOMSON LICENSING ,  ZHANG, Xiaoxin ,  ZHAO, Yuping ,  ZOU, Li

Inventor： ZHANG, Xiaoxin ,  ZHAO, Yuping ,  ZOU, Li

IPC: H04L27/26 ,  H04B1/12 ,  H04B1/10

CPC classification number: H03G3/001 ,  H03G3/345 ,  H04L5/0007 ,  H04L27/2647

Abstract: Methods and receivers for cancelling impulsive noise in Orthogonal Frequency Division Multiplexed (OFDM) wireless communications networks. The energy parameters of the impulsive noise in the signal are determined, and if the parameters exceed a threshold, the noise is cancelled from the signal by zeroing the pulses that exceed the threshold. The energy parameters and cancelling are performed in the time domain.

Abstract translation: 在正交频分复用（OFDM）无线通信网络中消除脉冲噪声的方法和接收机。 确定信号中的冲击噪声的能量参数，并且如果参数超过阈值，则通过使超过阈值的脉冲归零来从信号中消除噪声。 能量参数和取消在时域中进行。