公开(公告)号：US08102898B2

公开(公告)日：2012-01-24

申请号：US11816446

申请日：2006-02-24

申请人： Mariko Matsumoto ,  Shousei Yoshida ,  Noriyuki Maeda ,  Junichiro Kawamoto

发明人： Mariko Matsumoto ,  Shousei Yoshida ,  Noriyuki Maeda ,  Junichiro Kawamoto

IPC分类号： H04B1/707

CPC分类号： H04B1/7113

摘要： A corrected channel estimating apparatus is disclosed, which is capable of removing side-lobe components mutually leaking into transmission paths from channel estimates to increase the accuracy. A channel estimation unit calculates channel estimates for a plurality of transmission paths due to a signal that arrives through multipath. A channel estimate correction unit removes side-lobe components mutually leaking into the transmission paths from the channel estimates calculated by the channel estimation unit to correct the channel estimates. In this way, the corrected channel estimating apparatus estimates transmission paths of a multipath.

摘要翻译： 公开了一种校正信道估计装置，其能够从信道估计中去除相互泄漏到传输路径中的旁瓣分量，从而提高精度。 信道估计单元由于通过多路径到达的信号来计算多个传输路径的信道估计。 信道估计校正单元从信道估计单元计算的信道估计中去除相互泄漏到传输路径中的旁瓣分量，以校正信道估计。 以这种方式，校正信道估计装置估计多路径的传输路径。

公开(公告)号：US20090046588A1

公开(公告)日：2009-02-19

申请号：US11816446

申请日：2006-02-24

申请人： Mariko Matsumoto ,  Shousei Yoshida ,  Noriyuki Maeda ,  Junichiro Kawamoto

发明人： Mariko Matsumoto ,  Shousei Yoshida ,  Noriyuki Maeda ,  Junichiro Kawamoto

IPC分类号： H04L12/26

CPC分类号： H04B1/7113

摘要： A corrected channel estimating apparatus is disclosed, which is capable of removing side-lobe components mutually leaking into transmission paths from channel estimates to increase the accuracy. A channel estimation unit calculates channel estimates for a plurality of transmission paths due to a signal that arrives through multipath. A channel estimate correction unit removes side-lobe components mutually leaking into the transmission paths from the channel estimates calculated by the channel estimation unit to correct the channel estimates. In this way, the corrected channel estimating apparatus estimates transmission paths of a multipath.

摘要翻译： 公开了一种校正信道估计装置，其能够从信道估计中去除相互泄漏到传输路径中的旁瓣分量，从而提高精度。 信道估计单元由于通过多路径到达的信号来计算多个传输路径的信道估计。 信道估计校正单元从信道估计单元计算的信道估计中去除相互泄漏到传输路径中的旁瓣分量，以校正信道估计。 以这种方式，校正信道估计装置估计多路径的传输路径。

公开(公告)号：US07991360B2

公开(公告)日：2011-08-02

申请号：US10591663

申请日：2005-03-04

申请人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi ,  Shousei Yoshida ,  Masayuki Kimata

发明人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi ,  Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04B1/10

CPC分类号： H04B7/0854 ,  H04B1/7105 ,  H04B1/7107 ,  H04L1/0656 ,  H04L25/0228 ,  H04L2025/03426

摘要： A receiving apparatus, a receiving method, and a radio communications system are disclosed. The receiving apparatus is for receiving CDMA signals transmitted by M antennas and received by N antennas, where M and N are positive integers. The receiving apparatus includes a multipath receiving signal demodulating unit for primary demodulation of the CDMA signals received by the receiving antennas to obtain estimated transmission signals, and for obtaining signals in a multipath environment of each path of the receiving antennas based on the estimated results. Further, the receiving apparatus includes a multipath interference canceling unit for deducting signals of the paths other than a target path from the signals received by the receiving antennas to obtain multipath interference cancelled signals. Further, the receiving apparatus includes a demodulator for secondary demodulation of the multipath interference cancelled signals.

摘要翻译： 公开了接收装置，接收方法和无线电通信系统。 接收装置用于接收由M个天线发送并由N个天线接收的CDMA信号，其中M和N是正整数。 接收装置包括：多径接收信号解调单元，用于对由接收天线接收的CDMA信号进行一次解调以获得估计的传输信号，并且用于基于估计的结果获得接收天线的每个路径的多路径环境中的信号。 此外，接收装置包括：多径干扰消除单元，用于从由接收天线接收的信号中扣除目标路径以外的路径的信号，以获得多路径干扰消除信号。 此外，接收装置包括用于二次解调多径干扰消除信号的解调器。

公开(公告)号：US20070197166A1

公开(公告)日：2007-08-23

申请号：US10591663

申请日：2005-03-04

申请人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi ,  Shousei Yoshida ,  Masayuki Kimata

发明人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi ,  Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04B1/10 ,  H04B1/00 ,  H04B15/00

CPC分类号： H04B7/0854 ,  H04B1/7105 ,  H04B1/7107 ,  H04L1/0656 ,  H04L25/0228 ,  H04L2025/03426

摘要： A receiving apparatus, a receiving method, and a radio communications system are disclosed. The receiving apparatus is for receiving CDMA signals transmitted by M antennas and received by N antennas, where M and N are positive integers. The receiving apparatus includes a multipath receiving signal demodulating unit for primary demodulation of the CDMA signals received by the receiving antennas to obtain estimated transmission signals, and for obtaining signals in a multipath environment of each path of the receiving antennas based on the estimated results. Further, the receiving apparatus includes a multipath interference canceling unit for deducting signals of the paths other than a target path from the signals received by the receiving antennas to obtain multipath interference cancelled signals. Further, the receiving apparatus includes a demodulator for secondary demodulation of the multipath interference cancelled signals.

摘要翻译： 公开了接收装置，接收方法和无线电通信系统。 接收装置用于接收由M个天线发送并由N个天线接收的CDMA信号，其中M和N是正整数。 接收装置包括：多径接收信号解调单元，用于对由接收天线接收的CDMA信号进行一次解调以获得估计的传输信号，并且用于基于估计的结果获得接收天线的每个路径的多路径环境中的信号。 此外，接收装置包括：多径干扰消除单元，用于从由接收天线接收的信号中扣除目标路径以外的路径的信号，以获得多路径干扰消除信号。 此外，接收装置包括用于二次解调多径干扰消除信号的解调器。

公开(公告)号：US07826514B2

公开(公告)日：2010-11-02

申请号：US10526225

申请日：2004-04-26

申请人： Yoshikazu Kakura ,  Shousei Yoshida ,  Hiroyuki Atarashi ,  Noriyuki Maeda

发明人： Yoshikazu Kakura ,  Shousei Yoshida ,  Hiroyuki Atarashi ,  Noriyuki Maeda

IPC分类号： H04B1/00

CPC分类号： H04L5/026 ,  H04J11/0036 ,  H04J13/004 ,  H04L27/2613

摘要： A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.

摘要翻译： 一种无线电发射机 - 接收机，其中在发射机中使用导频符号，该发射机在频率轴上经过M码片扩​​频，并在时间轴上以N×M码片长度的扩频码（其中M和N为 任何整数等于或大于2），并且在接收机中，将不用于扩展所述导频信号的扩展码用作解扩码以对接收信号进行解扩，然后估计噪声和干扰功率。 用于扩展导频符号的扩展码和解扩使用的解扩码被分配为正交，即使只在时间轴上的N个码片。

公开(公告)号：US20060182167A1

公开(公告)日：2006-08-17

申请号：US10526225

申请日：2004-04-26

申请人： Yoshikazu Kakura ,  Shousei Yoshida ,  Hiroyuki Atarashi ,  Noriyuki Maeda

发明人： Yoshikazu Kakura ,  Shousei Yoshida ,  Hiroyuki Atarashi ,  Noriyuki Maeda

IPC分类号： H04B1/707

CPC分类号： H04L5/026 ,  H04J11/0036 ,  H04J13/004 ,  H04L27/2613

摘要： A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.

摘要翻译： 一种无线电发射机 - 接收机，其中在发射机中使用导频符号，该发射机在频率轴上经历了M码片扩频，并且在时间轴上通过M×N码片长度的扩展码（其中M和N是任何整数）进行N码片扩频 等于或大于2），并且在接收机中，将不用于扩展所述导频信号的扩展码用作解扩码，以对接收信号进行解扩，然后估计噪声和干扰功率。 用于扩展导频符号的扩展码和解扩使用的解扩码被分配为正交，即使只在时间轴上的N个码片。

公开(公告)号：US08144822B2

公开(公告)日：2012-03-27

申请号：US12117384

申请日：2008-05-08

申请人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

发明人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

IPC分类号： H03D1/04

CPC分类号： H04B1/10 ,  H04B7/0854 ,  H04B17/345 ,  H04B2201/70701 ,  H04W52/16 ,  H04W52/325

摘要： A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a received power of the pilot signal for each path; a part for removing a multipath interference component from the received power of the pilot signal by using a predetermined power ratio between the pilot signal and a data signal so as to obtain a corrected received power of the pilot signal; a part for estimating an estimated total power of the pilot signal and the data signal included in the received signal based on the corrected received power and the predetermined power ratio; and a part for subtracting the estimated total power from a total power of the received signal so as to obtain a noise power.

摘要翻译： 公开了一种噪声功率估计装置。 噪声功率估计装置包括：用于计算接收信号和导频信号之间的相关性的部分，以获得每个路径的导频信号的接收功率; 通过使用导频信号和数据信号之间的预定功率比，从导频信号的接收功率中去除多路径干扰分量的部分，以获得导频信号的校正接收功率; 用于基于校正的接收功率和预定功率比来估计导频信号的估计总功率和包括在接收信号中的数据信号的部分; 以及用于从接收信号的总功率中减去估计的总功率以获得噪声功率的部分。

公开(公告)号：US20080253432A1

公开(公告)日：2008-10-16

申请号：US12117384

申请日：2008-05-08

申请人： Junichiro KAWAMOTO ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

发明人： Junichiro KAWAMOTO ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

IPC分类号： H04B1/707

CPC分类号： H04B1/10 ,  H04B7/0854 ,  H04B17/345 ,  H04B2201/70701 ,  H04W52/16 ,  H04W52/325

摘要： A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a received power of the pilot signal for each path; a part for removing a multipath interference component from the received power of the pilot signal by using a predetermined power ratio between the pilot signal and a data signal so as to obtain a corrected received power of the pilot signal; a part for estimating an estimated total power of the pilot signal and the data signal included in the received signal based on the corrected received power and the predetermined power ratio; and a part for subtracting the estimated total power from a total power of the received signal so as to obtain a noise power.

摘要翻译： 公开了一种噪声功率估计装置。 噪声功率估计装置包括：用于计算接收信号和导频信号之间的相关性的部分，以获得每个路径的导频信号的接收功率; 通过使用导频信号和数据信号之间的预定功率比，从导频信号的接收功率中去除多路径干扰分量的部分，以获得导频信号的校正接收功率; 用于基于校正的接收功率和预定功率比来估计导频信号的估计总功率和包括在接收信号中的数据信号的部分; 以及用于从接收信号的总功率中减去估计的总功率以获得噪声功率的部分。

公开(公告)号：US20050255819A1

公开(公告)日：2005-11-17

申请号：US11121973

申请日：2005-05-05

申请人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

发明人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

IPC分类号： H04B1/707 ,  H04B7/08 ,  H04B17/02 ,  G01S3/16 ,  G01S3/28 ,  H04B1/06 ,  H04B7/00

CPC分类号： H04B1/7113 ,  H04B1/7107 ,  H04B1/7117

摘要： A path searcher (304) used in a receiver includes a power delay profile generating unit (402) configured to generate a power delay profile based on a signal received by the receiver, a sidelobe generating unit (406) configured to identify a sidelobe component of a path contained in the power delay profile based on a response characteristic of a band-limiting filter of the receiver, a sidelobe removing unit (407) configured to remove the sidelobe component from the power delay profile to produce a corrected power delay profile, and a path timing detection unit (408) configured to detect a path timing based on the corrected power delay profile.

摘要翻译： 在接收机中使用的路径搜索器（304）包括功率延迟分布生成单元（402），其被配置为基于由接收机接收的信号来产生功率延迟分布;旁瓣生成单元（406），被配置为识别旁路分量 基于接收机的带限滤波器的响应特性的功率延迟分布中包含的路径，配置成从功率延迟分布中去除旁瓣分量以产生校正的功率延迟分布的旁瓣去除单元（407），以及 路径定时检测单元（408），被配置为基于所述校正的功率延迟分布来检测路径定时。

公开(公告)号：US07421009B2

公开(公告)日：2008-09-02

申请号：US11128188

申请日：2005-05-13

申请人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

发明人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi

IPC分类号： H04B1/00

CPC分类号： H04B1/10 ,  H04B7/0854 ,  H04B17/345 ,  H04B2201/70701 ,  H04W52/16 ,  H04W52/325

摘要： A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a received power of the pilot signal for each path; a part for removing a multipath interference component from the received power of the pilot signal by using a predetermined power ratio between the pilot signal and a data signal so as to obtain a corrected received power of the pilot signal; a part for estimating an estimated total power of the pilot signal and the data signal included in the received signal based on the corrected received power and the predetermined power ratio; and a part for subtracting the estimated total power from a total power of the received signal so as to obtain a noise power.

摘要翻译： 公开了一种噪声功率估计装置。 噪声功率估计装置包括：用于计算接收信号和导频信号之间的相关性的部分，以获得每条路径的导频信号的接收功率; 通过使用导频信号和数据信号之间的预定功率比，从导频信号的接收功率中去除多路径干扰分量的部分，以获得导频信号的校正接收功率; 用于基于校正的接收功率和预定功率比来估计导频信号的估计总功率和包括在接收信号中的数据信号的部分; 以及用于从接收信号的总功率中减去估计的总功率以获得噪声功率的部分。