公开(公告)号：US20070201571A1

公开(公告)日：2007-08-30

申请号：US11711145

申请日：2007-02-26

申请人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

发明人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

IPC分类号： H04K1/10

CPC分类号： H04L25/0232 ,  H04L27/2647

摘要： A method of COFDM demodulation of successive symbols, each symbol comprising data carriers and pilots. The method includes, for each symbol, the determination of estimates of the transfer function of the channel for the symbol carriers, including the steps of determining, for first carriers such that, for the frequency positions of the considered carriers, symbols different from the symbol include pilots, a first estimate based on second estimates obtained for pilots having the frequency of the carrier; and determining, for second carriers, a third estimate based on the first estimates. For at least one first carrier, the first estimate is further determined based on at least the third estimate determined for a carrier of a symbol received before the symbol at the same frequency as the carrier.

摘要翻译： 连续符号的COFDM解调方法，每个符号包括数据载体和导频。 该方法包括对于每个符号，确定用于符号载波的信道的传递函数的估计，包括以下步骤：对于第一载波，对于所考虑的载波的频率位置，不同于符号的符号 包括导频，基于对具有载波频率的导频获得的第二估计的第一估计; 以及针对第二运营商，基于所述第一估计来确定第三估计。 对于至少一个第一载波，基于至少针对在与载波相同频率的符号之前接收到的符号的载波确定的第三估计进一步确定第一估计。

公开(公告)号：US20070237249A1

公开(公告)日：2007-10-11

申请号：US11710869

申请日：2007-02-26

申请人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

发明人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

IPC分类号： H04K1/10

CPC分类号： H04L25/0232 ,  H04L27/2607 ,  H04L27/2647

摘要： A method of COFDM demodulation of symbols, each including first carriers conveying data and pilots having their frequency positions varying at least partly from one symbol to the next symbol. The method includes, for each symbol, a step of determining a first estimate of the transfer function of the channel for each carrier in a set of the first carriers of the symbol such that, for the frequency positions of the considered carriers, symbols different from the symbol include pilots, corresponding to a linear combination of second estimates determined for pilots at the frequency of said carrier. The coefficients of the linear combination are determined in iterative fashion, a new coefficient value being equal to the sum of the last value of the coefficient and of a term including the product between an iteration step and an error term, the iteration step being determined in iterative fashion.

摘要翻译： 符号的COFDM解调的方法，每个包括传送数据的第一载波和其频率位置至少部分地从一个符号变化到下一个符号的导频。 该方法包括对于每个符号，确定符号的第一载波的集合中的每个载波的信道的传递函数的第一估计的步骤，使得对于所考虑的载波的频率位置，不同于 符号包括导频，对应于为所述载波的频率处的导频确定的第二估计的线性组合。 以迭代方式确定线性组合的系数，新的系数值等于系数的最后值与包括迭代步骤和误差项之间的乘积的项的和，迭代步骤在 迭代时尚。

公开(公告)号：US07801229B2

公开(公告)日：2010-09-21

申请号：US11710869

申请日：2007-02-26

申请人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

发明人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/0232 ,  H04L27/2607 ,  H04L27/2647

摘要： A method of COFDM demodulation of symbols, each including first carriers conveying data and pilots having their frequency positions varying at least partly from one symbol to the next symbol. The method includes, for each symbol, a step of determining a first estimate of the transfer function of the channel for each carrier in a set of the first carriers of the symbol such that, for the frequency positions of the considered carriers, symbols different from the symbol include pilots, corresponding to a linear combination of second estimates determined for pilots at the frequency of said carrier. The coefficients of the linear combination are determined in iterative fashion, a new coefficient value being equal to the sum of the last value of the coefficient and of a term including the product between an iteration step and an error term, the iteration step being determined in iterative fashion.

摘要翻译： 符号的COFDM解调的方法，每个包括传送数据的第一载波和其频率位置至少部分地从一个符号变化到下一个符号的导频。 该方法包括对于每个符号，确定符号的第一载波的集合中的每个载波的信道的传递函数的第一估计的步骤，使得对于所考虑的载波的频率位置，不同于 符号包括导频，对应于为所述载波的频率处的导频确定的第二估计的线性组合。 以迭代方式确定线性组合的系数，新的系数值等于系数的最后值与包括迭代步骤和误差项之间的乘积的项的和，迭代步骤在 迭代时尚。

公开(公告)号：US07715486B2

公开(公告)日：2010-05-11

申请号：US11711145

申请日：2007-02-26

申请人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

发明人： Olivier Isson ,  Fabrice Belveze ,  Fatima Aourik

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/0232 ,  H04L27/2647

摘要： A method of COFDM demodulation of successive symbols, each symbol comprising data carriers and pilots. The method includes, for each symbol, the determination of estimates of the transfer function of the channel for the symbol carriers, including the steps of determining, for first carriers such that, for the frequency positions of the considered carriers, symbols different from the symbol include pilots, a first estimate based on second estimates obtained for pilots having the frequency of the carrier; and determining, for second carriers, a third estimate based on the first estimates. For at least one first carrier, the first estimate is further determined based on at least the third estimate determined for a carrier of a symbol received before the symbol at the same frequency as the carrier.

摘要翻译： 连续符号的COFDM解调方法，每个符号包括数据载体和导频。 该方法包括对于每个符号，确定用于符号载波的信道的传递函数的估计，包括以下步骤：对于第一载波，对于所考虑的载波的频率位置，不同于符号的符号 包括导频，基于对具有载波频率的导频获得的第二估计的第一估计; 以及针对第二运营商，基于所述第一估计来确定第三估计。 对于至少一个第一载波，基于至少针对在与载波相同频率的符号之前接收到的符号的载波确定的第三估计进一步确定第一估计。