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公开(公告)号：US07983311B2
公开(公告)日：2011-07-19
申请号：US12298375
申请日：2007-04-23
IPC分类号： H04J3/00
CPC分类号： H04W56/0085 , H04L7/042 , H04L25/0224 , H04L27/261 , H04L27/2662 , H04W28/06 , H04W56/00
摘要： A correlation unit (32) sequentially obtains correlation values between a baseband signal and a reference signal and outputs the obtained reference signal to a section division unit (33). The output of the correlation unit (32) is divided into symbol time periods by the section division unit (33). A section position detection unit (34) detects a largest correlation value in each of sections resulting from the division by the correlation unit (32) and outputs, to a synchronization judgment unit (35), first position information that indicates a relative position of each detected largest correlation value. The synchronization judgment unit (35) detects an arrival of a packet signal and estimates a symbol timing based on the first position information of the sections.
摘要翻译： 相关单元（32）顺序地获得基带信号和参考信号之间的相关值，并将获得的参考信号输出到区段划分单元（33）。 相关单元（32）的输出由区段划分单元（33）分成符号时间段。 区间位置检测单元（34）检测由相关单元（32）分割得到的每个区间中的最大相关值，并向同步判断单元（35）输出表示每个区域的相对位置的第一位置信息 检测到最大相关值。 同步判断单元（35）检测分组信号的到达，并基于各部分的第一位置信息来估计符号定时。
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公开(公告)号：US20090175299A1
公开(公告)日：2009-07-09
申请号：US12298375
申请日：2007-04-23
CPC分类号： H04W56/0085 , H04L7/042 , H04L25/0224 , H04L27/261 , H04L27/2662 , H04W28/06 , H04W56/00
摘要： A correlation unit (32) sequentially obtains correlation values between a baseband signal and a reference signal and outputs the obtained reference signal to a section division unit (33). The output of the correlation unit (32) is divided into symbol time periods by the section division unit (33). A section position detection unit (34) detects a largest correlation value in each of sections resulting from the division by the correlation unit (32) and outputs, to a synchronization judgment unit (35), first position information that indicates a relative position of each detected largest correlation value. The synchronization judgment unit (35) detects an arrival of a packet signal and estimates a symbol timing based on the first position information of the sections.
摘要翻译： 相关单元（32）顺序地获得基带信号和参考信号之间的相关值，并将获得的参考信号输出到区段划分单元（33）。 相关单元（32）的输出由区段划分单元（33）分成符号时间段。 区间位置检测单元（34）检测由相关单元（32）分割得到的每个区间中的最大相关值，并向同步判断单元（35）输出表示每个区域的相对位置的第一位置信息 检测到最大相关值。 同步判断单元（35）检测分组信号的到达，并基于各部分的第一位置信息来估计符号定时。
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3.发明授权公开(公告)号：US08023599B2
公开(公告)日：2011-09-20
申请号：US12064421
申请日：2006-10-23
申请人： Koichiro Tanaka , Naganori Shirakata , Yoshio Urabe , Tsutomu Mukai , Kenji Miyanaga , Koji Imamura , Shuya Hosokawa
发明人： Koichiro Tanaka , Naganori Shirakata , Yoshio Urabe , Tsutomu Mukai , Kenji Miyanaga , Koji Imamura , Shuya Hosokawa
IPC分类号： H04B7/10
CPC分类号： H04B1/1027 , H04B1/7107 , H04B17/336 , H04L2025/03414 , H04L2025/03426
摘要： Interfering signals coming at random timings from different radio stations are identified. In order to attain this, a method for storing the characterizing quantity of an interfering signal included in a received signal includes calculating the characterizing quantity of the received signal, determining a probability that a desired signal is included in the received signal, determining that the received signal is an interfering signal when determining that there is no probability that the desired signal is included in the received signal, and storing the characterizing quantity of the received signal as an interfering signal characterizing quantity when it is determined at the received signal determination step that there is no probability that the desired signal is included in the received signal.
摘要翻译： 确定来自不同电台的随机定时信号的干扰信号。 为了实现这一点，包括在接收信号中的用于存储干扰信号的特征量的方法包括：计算接收信号的特征量，确定所需信号包含在接收信号中的概率，确定接收到的信号 信号是确定在接收信号中不存在所需信号的概率时的干扰信号，并且当在接收信号确定步骤确定接收信号确定步骤时将接收信号的特征量存储为干扰信号表征量 在所接收的信号中不包含所需信号的概率。
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公开(公告)号：US20100197262A1
公开(公告)日：2010-08-05
申请号：US12376387
申请日：2008-01-09
CPC分类号： H04B7/0865 , H04B17/345
摘要： The noise amount information storage unit 161 stores noise amount information which indicates relationships between gain value of the variable gain amplification units 121 and 125 and the amount of noise included in BB signals output from the down converters 131 and 135. The AGC unit 140 controls the gain value of the variable gain amplification units 121 and 125 so that the power of BB signals output from the down converters 131 and 135 becomes constant. The noise amount estimation unit 162 estimates noise amount of noise corresponding to the controlled gain value of the variable gain amplification units 121 and 125 by referring to the noise amount information stored in the noise amount information storage unit 161. The weight generation unit 170 generates weight matrix based on results of estimations performed by the channel characteristic estimation unit 150 and the noise estimation unit 162.
摘要翻译： 噪声量信息存储单元161存储指示可变增益放大单元121和125的增益值与从下变频器131和135输出的BB信号中包括的噪声量之间的关系的噪声量信息。AGC单元140控制 可变增益放大单元121和125的增益值，使得从下变频器131和135输出的BB信号的功率变得恒定。 噪声量估计单元162通过参考存储在噪声量信息存储单元161中的噪声量信息来估计与可变增益放大单元121和125的受控增益值相对应的噪声噪声量。权重生成单元170产生权重 基于由信道特性估计单元150和噪声估计单元162执行的估计结果的矩阵。
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5.发明授权OFDM receiving method of OFDM receiver for receiving an OFDM signal via a plurality of space paths 有权OFDM接收机的OFDM接收方法，用于经由多个空间路径接收OFDM信号公开(公告)号：US07558223B2
公开(公告)日：2009-07-07
申请号：US11395153
申请日：2006-04-03
CPC分类号： H04B7/0848 , H04L1/0048 , H04L1/06 , H04L5/026 , H04L25/03159 , H04L27/2657 , H04L27/2675 , H04L2025/03414 , H04L2025/03426 , H04L2027/003 , H04L2027/0048 , H04L2027/0067 , H04L2027/0087
摘要： OFDM signals each including a plurality of subcarriers (including data carriers and pilot carriers) orthogonal to each other are received by a plurality of receiver antennas. The received OFDM signals are each OFDM-demodulated into a plurality of receive subcarriers. Based on the plurality of receive subcarriers, the propagation coefficients of a plurality of space paths are estimated. An inverse matrix of a propagation matrix whose elements are the estimated propagation coefficients is calculated. Interference cancellation is performed for the plurality of receive subcarriers by using the inverse matrix, and transmit subcarriers multiplexed in space are estimated. A reliability of the inverse matrix is calculated. A pilot carrier is extracted from the estimated transmit subcarriers, and the extracted pilot carrier is weighted according to the reliability. An error included in the plurality of receive subcarriers is corrected based on the weighted pilot carrier.
摘要翻译： 每个包括彼此正交的多个子载波（包括数据载波和导频载波）的OFDM信号由多个接收机天线接收。 所接收的OFDM信号被OFDM解调成多个接收子载波。 基于多个接收子载波，估计多个空间路径的传播系数。 计算其元素是估计传播系数的传播矩阵的逆矩阵。 通过使用逆矩阵对多个接收子载波执行干扰消除，并且估计在空间中复用的发送子载波。 计算逆矩阵的可靠性。 从估计的发射子载波中提取导频载波，并根据可靠性对所提取的导频载波进行加权。 基于加权导频载波来校正包含在多个接收子载波中的误差。
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6.发明申请公开(公告)号：US20090135972A1
公开(公告)日：2009-05-28
申请号：US12064421
申请日：2006-10-23
申请人： Koichiro Tanaka , Naganori Shirakata , Yoshio Urabe , Tsutomu Mukai , Kenji Miyanaga , Koji Imamura , Shuya Hosokawa
发明人： Koichiro Tanaka , Naganori Shirakata , Yoshio Urabe , Tsutomu Mukai , Kenji Miyanaga , Koji Imamura , Shuya Hosokawa
IPC分类号： H04B1/04
CPC分类号： H04B1/1027 , H04B1/7107 , H04B17/336 , H04L2025/03414 , H04L2025/03426
摘要： An object is to identify interfering signals coming at random timings from different radio stations. In order to attain this object, a method for storing the characterizing quantity of an interfering signal included in a received signal comprises a characterizing quantity calculation step of calculating the characterizing quantity of the received signal; a received signal determination step of determining a probability that a desired signal is included in the received signal, and determining that the received signal is an interfering signal when determining that there is no probability that the desired signal is included in the received signal; and an interfering signal characterizing quantity storage step of storing the characterizing quantity of the received signal as an interfering signal characterizing quantity when it is determined at the received signal determination step that there is no probability that the desired signal is included in the received signal.
摘要翻译： 目的是识别来自不同电台的随机定时的干扰信号。 为了达到这个目的，一种用于存储包含在接收信号中的干扰信号的特征量的方法包括：计算接收信号的特征量的特征量计算步骤; 接收信号确定步骤，确定在所接收的信号中包含期望信号的概率，并且当确定不存在在所接收的信号中包含期望信号的概率时，确定所接收的信号是干扰信号; 以及干扰信号特征量存储步骤，当在接收信号确定步骤确定在接收信号中不包括所需信号的可能性时，将接收信号的特征量存储为干扰信号特征量。
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7.发明申请公开(公告)号：US20090034647A1
公开(公告)日：2009-02-05
申请号：US12281388
申请日：2007-03-01
申请人： Naganori Shirakata , Shuya Hosokawa , Koji Imamura , Koichiro Tanaka , Kenji Miyanaga , Yoshio Urabe , Tsutomu Mukai
发明人： Naganori Shirakata , Shuya Hosokawa , Koji Imamura , Koichiro Tanaka , Kenji Miyanaga , Yoshio Urabe , Tsutomu Mukai
IPC分类号： H04B15/00
CPC分类号： H04L69/28 , H04L1/0007 , H04L1/16 , H04W16/14 , H04W72/12
摘要： At a time T131, a wireless communication apparatus 11A determines to transmit a data packet, and then performs interference signal detection for a period TA. At a time T132 preceding a time T133 at which the period TA has elapsed since the time T131, the wireless communication apparatus 11A detects a data packet d21 (an interference signal). At a time T134 at which a period TB has elapsed since the time T132 at which the interference signal has been detected, the wireless communication apparatus 11A starts transmitting a data packet d11 to a wireless communication apparatus 12A. At a time T136, the wireless communication apparatus 11A completes the transmission of the data packet d11.
摘要翻译： 在时间T131，无线通信设备11A确定发送数据分组，然后执行周期TA的干扰信号检测。 无线通信装置11A在从时刻T131开始经过了周期TA的时间T133之前的时刻T132，检测到数据分组d21（干扰信号）。 在从检测到干扰信号的时间T132开始经过了周期TB的时间T134之后，无线通信装置11A开始向无线通信装置12A发送数据包d11。 在时间T136，无线通信装置11A完成数据分组d11的发送。
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公开(公告)号：US20070121750A1
公开(公告)日：2007-05-31
申请号：US10573044
申请日：2005-03-09
申请人： Naganori Shirakata , Yasuo Harada , Koichiro Tanaka , Tomohiro Kimura , Shuya Hosokawa , Yoshio Urabe
发明人： Naganori Shirakata , Yasuo Harada , Koichiro Tanaka , Tomohiro Kimura , Shuya Hosokawa , Yoshio Urabe
IPC分类号： H04L1/02
CPC分类号： H04L27/2657 , H04L25/0204 , H04L27/2613 , H04L27/2675
摘要： In a transfer apparatus to which MIMO-OFDM is applied, a data transmission method and a data reception method are provided in which, even when there are frequency errors varying among transfer paths, the precision of estimation of an inverse propagation coefficient function can be improved, thereby making it possible to suppress a degradation in characteristics. Among symbols composed of a plurality of subcarriers orthognal to each other, the transfer apparatus uses, as a synchronization symbol, a symbol in which predetermined amplitudes and phases are assigned to a plurality of subcarriers spaced at predetermined frequency intervals. The synchronization symbol is divided into transmission antennas to generate a plurality of synchronization subsymbols, which are in turn simultaneously transmitted from a plurality of transmission antennas. A reception apparatus estimates a frequency error for each transfer path based on synchronization subsymbols included in signals received by a plurality of reception antennas, and based on the estimated frequency errors, corrects the received signals.
摘要翻译： 在应用MIMO-OFDM的传送装置中，提供数据传输方法和数据接收方法，其中即使在传输路径之间存在频率误差变化的情况下，也可以提高反向传播系数函数的估计精度 ，从而可以抑制特性的劣化。 在由彼此正交的多个子载波组成的符号之中，传送装置使用将预定的幅度和相位分配给以预定频率间隔隔开的多个子载波的符号作为同步符号。 同步符号被分成发送天线以产生多个同步子符号，这些同步子符号又从多个发送天线同时发送。 接收装置基于由多个接收天线接收的信号中包含的同步子符号估计每个传送路径的频率误差，并且基于估计的频率误差来校正接收到的信号。
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公开(公告)号：US20060221808A1
公开(公告)日：2006-10-05
申请号：US11395153
申请日：2006-04-03
IPC分类号： H04J11/00
CPC分类号： H04B7/0848 , H04L1/0048 , H04L1/06 , H04L5/026 , H04L25/03159 , H04L27/2657 , H04L27/2675 , H04L2025/03414 , H04L2025/03426 , H04L2027/003 , H04L2027/0048 , H04L2027/0067 , H04L2027/0087
摘要： OFDM signals each including a plurality of subcarriers (including data carriers and pilot carriers) orthogonal to each other are received by a plurality of receiver antennas. The received OFDM signals are each OFDM-demodulated into a plurality of receive subcarriers. Based on the plurality of receive subcarriers, the propagation coefficients of a plurality of space paths are estimated. An inverse matrix of a propagation matrix whose elements are the estimated propagation coefficients is calculated. Interference cancellation is performed for the plurality of receive subcarriers by using the inverse matrix, and transmit subcarriers multiplexed in space are estimated. A reliability of the inverse matrix is calculated. A pilot carrier is extracted from the estimated transmit subcarriers, and the extracted pilot carrier is weighted according to the reliability. An error included in the plurality of receive subcarriers is corrected based on the weighted pilot carrier.
摘要翻译： 每个包括彼此正交的多个子载波（包括数据载波和导频载波）的OFDM信号由多个接收机天线接收。 所接收的OFDM信号被OFDM解调成多个接收子载波。 基于多个接收子载波，估计多个空间路径的传播系数。 计算其元素是估计传播系数的传播矩阵的逆矩阵。 通过使用逆矩阵对多个接收子载波执行干扰消除，并且估计在空间中复用的发送子载波。 计算逆矩阵的可靠性。 从估计的发射子载波中提取导频载波，并根据可靠性对所提取的导频载波进行加权。 基于加权导频载波来校正包含在多个接收子载波中的误差。
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公开(公告)号：US08233865B2
公开(公告)日：2012-07-31
申请号：US12376387
申请日：2008-01-09
IPC分类号： H04B1/00
CPC分类号： H04B7/0865 , H04B17/345
摘要： The noise amount information storage unit 161 stores noise amount information which indicates relationships between gain value of the variable gain amplification units 121 and 125 and the amount of noise included in BB signals output from the down converters 131 and 135. The AGC unit 140 controls the gain value of the variable gain amplification units 121 and 125 so that the power of BB signals output from the down converters 131 and 135 becomes constant. The noise amount estimation unit 162 estimates noise amount of noise corresponding to the controlled gain value of the variable gain amplification units 121 and 125 by referring to the noise amount information stored in the noise amount information storage unit 161. The weight generation unit 170 generates weight matrix based on results of estimations performed by the channel characteristic estimation unit 150 and the noise estimation unit 162.
摘要翻译： 噪声量信息存储单元161存储指示可变增益放大单元121和125的增益值与从下变频器131和135输出的BB信号中包括的噪声量之间的关系的噪声量信息。AGC单元140控制 可变增益放大单元121和125的增益值，使得从下变频器131和135输出的BB信号的功率变得恒定。 噪声量估计单元162通过参考存储在噪声量信息存储单元161中的噪声量信息来估计与可变增益放大单元121和125的受控增益值相对应的噪声噪声量。权重生成单元170产生权重 基于由信道特性估计单元150和噪声估计单元162执行的估计结果的矩阵。
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