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公开(公告)号：EP1217798A3
公开(公告)日：2004-04-14
申请号：EP01129388.3
申请日：2001-12-18
申请人： NTT DoCoMo, Inc.
CPC分类号： H04L25/03038 , H04L2025/03401 , H04L2025/03477 , H04L2025/03617
摘要： During reception of a training signal b(n) in a received signal R (n) an estimated impulse response H m (n) of an M-channel channel, and a tap coefficient G (n) of a linear filter (111) are calculated by an adaptive algorithm through the use of the received signal R (n) and the training signal b(n). For an information symbol of the received signal R (n), the received signal R (n) is subjected to linear filtering with the most recently calculated tap coefficients G (n), and the linear filtering output Z (n) and the most recently estimated impulse response value H m (n) are used to calculate a soft decision value λ 1 . In the second and subsequent rounds of equalization, the likelihood b'(n) of a soft decision value λ 2 [b(n)] from a decoder is calculated, and a replica are generated by linearly filtering the likelihood b'(n) with an estimated impulse response value vector H L (n) obtained by approximating intersymbol interference with the current code b(n) to zero. A difference signal R c (n) between the replica and the received signal is calculated, and the estimated impulse response value vector H L (n) is used to update the tap coefficients G (n). Then the signal Z (n) is obtained by linearly filtering the difference signal R c (n) with the updated tap coefficient G (n), and the signal Z (n) and the estimated impulse response value vector H L (n) are used to calculate the soft decision value λ 1 .
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公开(公告)号：EP1233565A3
公开(公告)日：2003-05-21
申请号：EP02003795.8
申请日：2002-02-20
申请人： NTT DoCoMo, Inc.
CPC分类号： H04L25/0236 , H04L1/005 , H04L25/0204
摘要： An impluse response h mn (q) of each transmission path is estimated from N received signals r m (m=1, ···, M) and a known signal (for a number of users equal to N, n=1, ···, N). M×N matrix H (q) having h mn (q) as an element and a Q×Q matrix H having H (q) as an element are determined (where Q represents a number of multipaths of each transmitted wave and q=0, ···, Q-1). A soft decision value b' n (k) is determined from decoded λ 2 [b n (k)], and this is used to generate an interference component matrix B' (k) to generate an interference replica H·B' (k). The interference replica H·B' (k) is subtracted from a received matrix y (k) to determine y' (k). y (k) and H are used to determine an adaptive filter coefficient w n (k) to be applied to an n-th user in order to eliminate residual interference components in y' (k) according to the minimum mean square error criteria. y (k) is passed through w n (k) to provide a log-likelihood ratio as a received signal from the user n from which interferences are eliminated.
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3.发明授权Transmitter, receiver, power amplification method, and signal demodulation method 有权发射机，接收机，功率放大方法以及信号解调
公开(公告)号：EP2226981B1
公开(公告)日：2015-07-15
申请号：EP10250344.8
申请日：2010-02-26
申请人： NTT DOCOMO, INC.
IPC分类号： H04L27/26
CPC分类号： H04L27/2624 , H04L27/2626 , H04L27/2647
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4.发明公开Turbo-reception method and turbo-receiver for a MIMO system 有权Turbo-Empfängerund das entsprechende Verfahrenfürein MIMO系统
公开(公告)号：EP1233565A2
公开(公告)日：2002-08-21
申请号：EP02003795.8
申请日：2002-02-20
申请人： NTT DoCoMo, Inc.
CPC分类号： H04L25/0236 , H04L1/005 , H04L25/0204
摘要： An impluse response h mn (q) of each transmission path is estimated from N received signals r m (m=1, ···, M) and a known signal (for a number of users equal to N, n=1, ···, N). M×N matrix H (q) having h mn (q) as an element and a Q×Q matrix H having H (q) as an element are determined (where Q represents a number of multipaths of each transmitted wave and q=0, ···, Q-1). A soft decision value b' n (k) is determined from decoded λ 2 [b n (k)], and this is used to generate an interference component matrix B' (k) to generate an interference replica H·B' (k). The interference replica H·B' (k) is subtracted from a received matrix y (k) to determine y' (k). y (k) and H are used to determine an adaptive filter coefficient w n (k) to be applied to an n-th user in order to eliminate residual interference components in y' (k) according to the minimum mean square error criteria. y (k) is passed through w n (k) to provide a log-likelihood ratio as a received signal from the user n from which interferences are eliminated.
摘要翻译： 从N个接收信号rm（m = 1，...，M）和已知信号（对于等于N，n = 1，...的用户数量）来估计每个传输路径的内在响应hmn（q） ，N）。 确定具有hmn（q）作为元素的M×N矩阵H（q）和具有H（q）作为元素的QxQ矩阵H（其中Q表示每个发送波的多径的数量，q = 0，...， Q-1）。 从解码的λ2Äbn（k）Ü确定软判定值b'n（k），并且这用于产生干扰分量矩阵B'（k）以产生干扰复制品H.B'（k）。 从接收矩阵y（k）中减去干扰副本H.B'（k）以确定y'（k）。 y（k）和H用于确定要施加到第n个用户的自适应滤波器系数wn（k），以便根据最小均方误差准则来消除y'（k）中的残余干扰分量。 y（k）通过wn（k），以提供对数似然比作为来自消除干扰的用户n的接收信号。
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5.发明公开
公开(公告)号：EP1217798A2
公开(公告)日：2002-06-26
申请号：EP01129388.3
申请日：2001-12-18
申请人： NTT DoCoMo, Inc.
IPC分类号： H04L25/03
CPC分类号： H04L25/03038 , H04L2025/03401 , H04L2025/03477 , H04L2025/03617
摘要： During reception of a training signal in a received signal R (n) an estimated impulse response value H m (n) of an M-channel channel, and a tap coefficient G (n) of a linear filter 111 is calculated by an adaptive algorithm through the use of the received signal R (n) and the training signal b(n). For an information symbol of the received signal R (n), the received signal R (n) is subjected to linear filtering with the most recently calculated tap coefficient G (n), and the linear filtering output Z (n) and the most recently estimated impulse response value H m (n) are used to calculate a soft decision value λ 1 . In the second and subsequent rounds of equalization, the likelihood b'(n) of a soft decision value λ 2 [b(n)] from a decoder is calculated, and a replica is generated by linear-filtering the likelihood b'(n) with an estimated impulse response value vector H L (n) obtained by approximating intersymbol interference with the current code b(n) to zero. A difference signal R c (n) between the replica and the received signal is calculated, and the estimated impulse response value vector H L (n) is used to update the tap coefficient G (n). Then the signal Z (n) is obtained by linear-filtering the difference signal R c (n) with the updated tap coefficient G (n), and the signal Z (n) and the estimated impulse response value vector H L (n) are used to calculate the soft decision value λ 1 .
摘要翻译： 在接收信号R（n）中的训练信号的接收期间，通过自适应算法通过自适应算法计算M信道信道的估计脉冲响应值Hm（n）和线性滤波器111的抽头系数G（n） 使用接收信号R（n）和训练信号b（n）。 对于接收信号R（n）的信息符号，使用最近计算的抽头系数G（n）对接收信号R（n）进行线性滤波，并且将线性滤波输出Z（n）和最近的 估计的脉冲响应值Hm（n）用于计算软判决值λ1.在第二次和随后的均衡中，来自解码器的软判决值λ2（b）（n） 通过用与当前代码b（n）近似码间干扰获得的估计的脉冲响应值向量HL（n）线性滤波似然度b'（n）来生成副本。 计算复制和接收信号之间的差信号Rc（n），并且使用估计的脉冲响应值向量HL（n）来更新抽头系数G（n）。 然后通过用更新的抽头系数G（n）对差分信号Rc（n）进行线性滤波，并使用信号Z（n）和估计的脉冲响应值向量HL（n）来获得信号Z（n） 以计算软判决值λ1。
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公开(公告)号：EP1158694A3
公开(公告)日：2002-10-02
申请号：EP01107554.6
申请日：2001-03-27
申请人： NTT DoCoMo, Inc.
摘要： Outputs from respective elements of an array antenna 21 are demodulated, and the demodulated outputs are stored in storage means 29. The demodulated outputs are multiplied by tap coefficients of adaptive array antenna, then the multiplied outputs are combined by combining means 28, and the combined output is provided via a feed forward filter 22 to an adaptive equalizer 23, wherein it is equalized to obtain a decision symbol. During reception of a training signal the tap coefficients of adaptive array antenna and tap coefficients of the adaptive equalizer 23 are subjected to convergence processing by tap coefficient calculating means 24 so that an error signal becomes small, and then tap coefficients of the feed forward filter 22 and the adaptive equalizer 23 are subjected to convergence processing by tap coefficient calculating means 25 so that an error signal becomes small. Thereafter, the convergence processing by the means 24 and 25 is repeated, during which a training signal stored in storage means 29 is used, results of the immediately preceding convergence processing are used as initial values, and it is decided by receiving quality estimating means 26 whether the error signal has become sufficiently small relative to the received signal power.
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公开(公告)号：EP1158694A2
公开(公告)日：2001-11-28
申请号：EP01107554.6
申请日：2001-03-27
申请人： NTT DoCoMo, Inc.
摘要： Outputs from respective elements of an array antenna 21 are demodulated, and the demodulated outputs are stored in storage means 29. The demodulated outputs are multiplied by tap coefficients of adaptive array antenna, then the multiplied outputs are combined by combining means 28, and the combined output is provided via a feed forward filter 22 to an adaptive equalizer 23, wherein it is equalized to obtain a decision symbol. During reception of a training signal the tap coefficients of adaptive array antenna and tap coefficients of the adaptive equalizer 23 are subjected to convergence processing by tap coefficient calculating means 24 so that an error signal becomes small, and then tap coefficients of the feed forward filter 22 and the adaptive equalizer 23 are subjected to convergence processing by tap coefficient calculating means 25 so that an error signal becomes small. Thereafter, the convergence processing by the means 24 and 25 is repeated, during which a training signal stored in storage means 29 is used, results of the immediately preceding convergence processing are used as initial values, and it is decided by receiving quality estimating means 26 whether the error signal has become sufficiently small relative to the received signal power.
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公开(公告)号：EP1217798B1
公开(公告)日：2007-11-07
申请号：EP01129388.3
申请日：2001-12-18
申请人： NTT DoCoMo, Inc.
CPC分类号： H04L25/03038 , H04L2025/03401 , H04L2025/03477 , H04L2025/03617
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公开(公告)号：EP1233565B1
公开(公告)日：2006-08-23
申请号：EP02003795.8
申请日：2002-02-20
申请人： NTT DoCoMo, Inc.
CPC分类号： H04L25/0236 , H04L1/005 , H04L25/0204
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