公开(公告)号：EP2536082A1

公开(公告)日：2012-12-19

申请号：EP11170157.9

申请日：2011-06-16

申请人： Sequans Communications

发明人： Sezginer, Serdar ,  Liu, Yang

IPC分类号： H04L25/02

CPC分类号： H04L25/022 ,  H04L25/023 ,  H04L25/0244 ,  H04L25/0256

摘要： The invention relates to a channel estimation treatment method, said channel estimation being used for obtaining binary data conveyed in a signal.
According to the invention, said method comprises the following processing steps:
- obtaining a vector of channel estimates, called a current vector, each element of the current vector corresponding to an estimate of a subchannel;
- detecting, inside said current vector, at least one pilot symbol;
- splitting said current vector in at least two distinct subvector, at least one first subvector comprising channel estimates related to data symbols and/or pilots symbols and at least one second subvector comprising channel estimates related to null symbols;
- decoding of said at least one subvector, delivering at least one first treated subvector;
- modifying said at least one second subvector by assuming a presence of pilot symbols in said at least one second subvector, delivering at least one second treated subvector;
- calculating a new vector of channel estimates with said at least one first treated subvector and said at least one second treated subvector.

摘要翻译： 本发明涉及一种信道估计处理方法，所述信道估计用于获得在信号中传送的二进制数据。 根据本发明，所述方法包括以下处理步骤： - 获得称为当前向量的信道估计向量，所述当前向量的每个元素对应于子信道的估计; - 在所述电流矢量内检测至少一个导频符号; - 在至少两个不同子向量中分割所述当前向量，至少一个第一子向量包括与数据符号和/或导频符号相关的信道估计，以及包括与空符号相关的信道估计的至少一个第二子向量; - 解码所述至少一个子向量，传送至少一个第一处理的子向量; - 通过假设在所述至少一个第二子向量中存在导频符号来修改所述至少一个第二子向量，递送至少一个第二处理的子向量; - 利用所述至少一个第一处理子向量和所述至少一个第二处理子向量计算信道估计的新向量。

公开(公告)号：EP2597797B1

公开(公告)日：2017-07-26

申请号：EP11306565.0

申请日：2011-11-25

申请人： Sequans Communications

发明人： Sezginer, Serdar ,  Liu, Yang

IPC分类号： H04J11/00 ,  H04B1/7105 ,  H04B7/08 ,  H04L1/06

CPC分类号： H04L25/03006 ,  H04B1/7105 ,  H04J11/0036 ,  H04L1/005 ,  H04L1/0061 ,  H04L25/03286 ,  H04L2025/03426 ,  H04B7/04 ,  H04L1/06

公开(公告)号：EP2442507B1

公开(公告)日：2017-02-15

申请号：EP10187691.0

申请日：2010-10-15

申请人： Sequans Communications

发明人： Sezginer, Serdar ,  Liu, Yang

IPC分类号： H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0236 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0248 ,  H04L25/03318 ,  H04L2025/03414 ,  H04L2025/03426

公开(公告)号：EP2704384A2

公开(公告)日：2014-03-05

申请号：EP13181007.9

申请日：2013-08-20

申请人： Sequans Communications

发明人： Chrabieh, Rabih ,  Liu, Yang

IPC分类号： H04L25/06

CPC分类号： H04L25/067 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0631 ,  H04L25/03891 ,  H04L2025/03426

摘要： The disclosure relates to a method for decoding a received signal in a MIMO communication system and in at least one layer, each layer carrying at least one data symbol belonging to a signal constellation,
According to the disclosure, said method comprises, for one of said at least one layer, a maximum likelihood detection step (20) comprising:
- selecting (21) one candidate value for the data symbol of the layer,
- determining (22) the Euclidian distance between the received signal Y and the data signal transmitted using said candidate value multiplied by said channel matrix H, weighted by the inverse of a noise covariance matrix C such as | Y - ∑ i ⁢ H i ⁢ x i | C - 1 2 , expressed as :

wherein the terms depending on α k are computed by adding (220) to each of them a predetermined constant depending on the size of the constellation of the layer k, called a constellation dependent constant.

摘要翻译： 本公开涉及一种用于在MIMO通信系统中和在至少一个层中，每一层承载属于的信号星座图在至少一个数据符号，。根据本公开内容的接收信号进行解码，所述方法包括，对于所述的一个 的至少一个层，一个最大似然检测步骤（20），包括： - 选择用于该层的数据符号（21）的一个候选值， - 确定开采（22）使用所接收的信号Y和数据之间的欧几里德距离信号TRANS mitted 由所述信道矩阵H的所述候选值相乘，通过噪声协方差矩阵C的逆加权：如| Ÿ - “我¢¢H I X I | c ^ - 1 2，表示为：其中，根据±k中的术语通过添加（220）到它们中的每一个预定的常数取决于层k的星座的大小来计算，称为星座相关的常数。

公开(公告)号：EP2597797A1

公开(公告)日：2013-05-29

申请号：EP11306565.0

申请日：2011-11-25

申请人： Sequans Communications

发明人： Sezginer, Serdar ,  Liu, Yang

IPC分类号： H04J11/00 ,  H04B1/7105 ,  H04B7/08 ,  H04L1/06

CPC分类号： H04L25/03006 ,  H04B1/7105 ,  H04J11/0036 ,  H04L1/005 ,  H04L1/0061 ,  H04L25/03286 ,  H04L2025/03426 ,  H04B7/04 ,  H04L1/06

摘要： The invention relates to a Method for cancelling interferences of a received MIMO RF signal.
According to the invention, said method comprises:
- a step of receiving a signal y ;
- an initial step of obtaining, from said received signal y, at least one data representative of said decoded signal, called decoded data;
- computing said at least one decoded data in function of at least one predetermined criterion, delivering feedback data and a feedback decision;

and, in function of said feedback decision, at least one iteration of the following steps:
- constructing a set of feedback symbols from said feedback data;
- a step of obtaining, from said set of feedback symbols, at least one data representative of a feedback decoded signal, called feedback decoded data;
- computing said at least one feedback decoded data in function of said at least one predetermined criterion, delivering feedback data;

摘要翻译： 本发明涉及一种用于消除所接收的MIMO RF信号的干扰的方法。 根据本发明，所述方法包括： - 接收信号y的步骤; - 从所述接收信号y获得表示所述解码信号的至少一个数据的初始步骤，称为解码数据; - 以至少一个预定标准计算所述至少一个解码数据，传送反馈数据和反馈决定; 以及根据所述反馈决定的功能，进行以下步骤的至少一次迭代： - 从所述反馈数据构建一组反馈符号; - 从所述反馈符号组获得表示反馈解码信号的至少一个数据，称为反馈解码数据的步骤; - 根据所述至少一个预定标准计算所述至少一个反馈解码数据，传送反馈数据;

公开(公告)号：EP2442507A1

公开(公告)日：2012-04-18

申请号：EP10187691.0

申请日：2010-10-15

申请人： Sequans Communications

发明人： Sezginer, Serdar ,  Liu, Yang

IPC分类号： H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0236 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0248 ,  H04L25/03318 ,  H04L2025/03414 ,  H04L2025/03426

摘要： The invention relates to a channel estimating method in an orthogonal frequency division multiplexing (OFDM) system transmitting signals over said channel, wherein an OFDM symbol of each of said signals has at least one null subcarrier set in its defined bandwidth,
According to the invention, said method comprises the following steps:
- obtaining at least one initial channel estimate over at least one OFDM symbol of a received signal;
- processing said at least one initial channel estimate for delivering at least one soft information in a form of a complete matrix;
- improving said at least one initial channel estimate by performing a truncated singular value decomposition of a partial FFT matrix, wherein said partial FFT matrix comprises only the first LDP columns and the rows NDP of an FFT matrix of said complete matrix, said NDP rows corresponding to modulated subcarriers of received signal, including data and pilot symbols and excluding said at least one null subcarrier, delivering an improved channel estimate.

公开(公告)号：EP2704384B1

公开(公告)日：2016-11-02

申请号：EP13181007.9

申请日：2013-08-20

申请人： Sequans Communications

发明人： Chrabieh, Rabih ,  Liu, Yang

IPC分类号： H04L25/06 ,  H04L25/03

CPC分类号： H04L25/067 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0631 ,  H04L25/03891 ,  H04L2025/03426

公开(公告)号：EP2704384A3

公开(公告)日：2015-10-14

申请号：EP13181007.9

申请日：2013-08-20

申请人： Sequans Communications

发明人： Chrabieh, Rabih ,  Liu, Yang

IPC分类号： H04L25/06 ,  H04L25/03

CPC分类号： H04L25/067 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0631 ,  H04L25/03891 ,  H04L2025/03426

摘要： The disclosure relates to a method for decoding a received signal in a MIMO communication system and in at least one layer, each layer carrying at least one data symbol belonging to a signal constellation,
According to the disclosure, said method comprises, for one of said at least one layer, a maximum likelihood detection step (20) comprising:
- selecting (21) one candidate value for the data symbol of the layer,
- determining (22) the Euclidian distance between the received signal Y and the data signal transmitted using said candidate value multiplied by said channel matrix H, weighted by the inverse of a noise covariance matrix C such as | Y - ∑ i ⁢ H i ⁢ x i | C - 1 2 , expressed as :

wherein the terms depending on α k are computed by adding (220) to each of them a predetermined constant depending on the size of the constellation of the layer k, called a constellation dependent constant.