公开(公告)号：US07551548B2

公开(公告)日：2009-06-23

申请号：US11387966

申请日：2006-03-24

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

IPC分类号： H04J11/00

CPC分类号： H04L27/2647

摘要： Orthogonal frequency division multiplexing demodulation apparatus includes: antenna to receive signal including holding period including part of period ranging from leading portion of delayed wave of maximum-delay time to trailing portion of preceding wave, unit estimating channel response of signal received by antenna, unit holding, based on channel response, first-signal component contained in holding period, first-signal component including second-signal component which is contained in period of preset length which is included in holding period, unit acquiring filter-bank outputs by subjecting second-signal component to frequency conversion, unit generating replicas for each of filter-bank outputs, based on estimated-channel response, frequency response of each of filter-bank outputs, and candidates for modulation signal corresponding to subcarrier included in each of filter-bank outputs, unit selecting one of replicas which minimizes quantity corresponding to differences between components of each of filter-bank outputs and components of replicas, and unit determining modulation signal based on selected replica.

摘要翻译： 正交频分复用解调装置包括：天线接收信号，包括保持周期，包括从最大延迟时间的延迟波的前导部分到前一个波形的尾部的时间段的一部分，单元估计由天线接收的信号的信道响应，单元保持 基于信道响应，包含在保持周期中的第一信号分量包括包含在保持周期中的预设长度的周期中的第二信号分量的第一信号分量通过对第二信号进行二次信号的单元获取滤波器组输出 基于估计的信道响应，每个滤波器组输出的频率响应以及与每个滤波器组输出中包括的子载波相对应的调制信号的候选，对于每个滤波器组输出的单元生成副本， 选择最小化对应于co之间的差异的数量的复制品之一的单元 滤波器组输出和副本组件中的每一个的组成部分，以及基于选择的副本的单元确定调制信号。

公开(公告)号：US20060285482A1

公开(公告)日：2006-12-21

申请号：US11387966

申请日：2006-03-24

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

IPC分类号： H04J11/00

CPC分类号： H04L27/2647

摘要： Orthogonal frequency division multiplexing demodulation apparatus includes: antenna to receive signal including holding period including part of period ranging from leading portion of delayed wave of maximum-delay time to trailing portion of preceding wave, unit estimating channel response of signal received by antenna, unit holding, based on channel response, first-signal component contained in holding period, first-signal component including second-signal component which is contained in period of preset length which is included in holding period, unit acquiring filter-bank outputs by subjecting second-signal component to frequency conversion, unit generating replicas for each of filter-bank outputs, based on estimated-channel response, frequency response of each of filter-bank outputs, and candidates for modulation signal corresponding to subcarrier included in each of filter-bank outputs, unit selecting one of replicas which minimizes quantity corresponding to differences between components of each of filter-bank outputs and components of replicas, and unit determining modulation signal based on selected replica.

公开(公告)号：US07627047B2

公开(公告)日：2009-12-01

申请号：US11288112

申请日：2005-11-29

申请人： Makoto Tsuruta ,  Hidehiro Matsuoka ,  Hideo Kasami

发明人： Makoto Tsuruta ,  Hidehiro Matsuoka ,  Hideo Kasami

IPC分类号： H04K1/10

CPC分类号： H04B7/0874 ,  H04B7/084 ,  H04B7/0857 ,  H04L27/2657 ,  H04L27/2675

摘要： An OFDM receiver apparatus mounted on a movable object for receiving an OFDM signal, includes a plurality of directional antennas which receive an OFDM signal, an estimator to estimate a center frequency of a spectrum of a Doppler component from one of the received signals or a multiplexed signal obtained by multiplexing the received signals, a shift quantity calculator to calculate a shift quantity from the estimated center frequency of the estimator and directivity information representing directivity directions of the directional antennas, a plurality of frequency shifters to subject the received signals to frequency shift according to the shift quantity to compensate for Doppler shift, a combining unit to diversity-combine frequency shifted signals of the frequency shifters, and a demodulator/decoder to demodulate and decode combining diversity signals of the combining unit.

摘要翻译： 安装在用于接收OFDM信号的可移动物体上的OFDM接收机装置包括接收OFDM信号的多个定向天线，估计器，用于从接收信号之一估计多普勒分量的频谱的中心频率，或多路复用 通过多路复用接收信号获得的信号;移位量计算器，用于根据估计器的估计中心频率计算偏移量，以及指示方向性天线的方向性方向的方向性信息;多个频移器，用于使接收到的信号进行频移， 到用于补偿多普勒频移的移位量，用于对移频器的频移信号进行分集组合的组合单元，以及解调/解码器，对组合单元的组合分集信号进行解调和解码。

公开(公告)号：US20060115011A1

公开(公告)日：2006-06-01

申请号：US11288112

申请日：2005-11-29

申请人： Makoto Tsuruta ,  Hidehiro Matsuoka ,  Hideo Kasami

发明人： Makoto Tsuruta ,  Hidehiro Matsuoka ,  Hideo Kasami

IPC分类号： H04K1/10

CPC分类号： H04B7/0874 ,  H04B7/084 ,  H04B7/0857 ,  H04L27/2657 ,  H04L27/2675

摘要： An OFDM receiver apparatus mounted on a movable object for receiving an OFDM signal, includes a plurality of directional antennas which receive an OFDM signal, an estimator to estimate a center frequency of a spectrum of a Doppler component from one of the received signals or a multiplexed signal obtained by multiplexing the received signals, a shift quantity calculator to calculate a shift quantity from the estimated center frequency of the estimator and directivity information representing directivity directions of the directional antennas, a plurality of frequency shifters to subject the received signals to frequency shift according to the shift quantity to compensate for Doppler shift, a combining unit to diversity-combine frequency shifted signals of the frequency shifters, and a demodulator/decoder to demodulate and decode combining diversity signals of the combining unit.

公开(公告)号：US20060114814A1

公开(公告)日：2006-06-01

申请号：US11268657

申请日：2005-11-08

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

IPC分类号： H04J11/00

CPC分类号： H04L25/03006 ,  H04L2025/03414

摘要： An OFDM demodulator that demodulates an OFDM signal includes an antenna that receives a signal including delayed signals, an estimation circuit that estimates the channel response of the received signal, and a control circuit that controls a length of a retention time interval based on the estimated channel response. The retention time interval includes a time period from the head of a delayed signal having a maximum delay time in the delayed signals to the tail of a preceding signal in the delayed signals based on the estimated channel response. The OFDM demodulator also includes a retention memory that retains a portion of the received signal corresponding to the retention time period, and a selection circuit that selects an OFDM symbol based on a calculation of a maximum likelihood that the retained received signal is equivalent to a signal replica based on the channel response.

公开(公告)号：US07570578B2

公开(公告)日：2009-08-04

申请号：US11268657

申请日：2005-11-08

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

IPC分类号： H04J11/00

CPC分类号： H04L25/03006 ,  H04L2025/03414

摘要： An OFDM demodulator that demodulates an OFDM signal includes an antenna that receives a signal including delayed signals, an estimation circuit that estimates the channel response of the received signal, and a control circuit that controls a length of a retention time interval based on the estimated channel response. The retention time interval includes a time period from the head of a delayed signal having a maximum delay time in the delayed signals to the tail of a preceding signal in the delayed signals based on the estimated channel response. The OFDM demodulator also includes a retention memory that retains a portion of the received signal corresponding to the retention time period, and a selection circuit that selects an OFDM symbol based on a calculation of a maximum likelihood that the retained received signal is equivalent to a signal replica based on the channel response.

摘要翻译： 解调OFDM信号的OFDM解调器包括接收包括延迟信号的信号的天线，估计接收信号的信道响应的估计电路以及基于所估计的信道来控制保持时间间隔的长度的控制电路 响应。 保留时间间隔包括从基于所估计的信道响应的延迟信号中延迟信号中延迟信号的最大延迟时间的头部到先前信号的尾部的时间段。 OFDM解调器还包括保留存储器，其保留对应于保留时间段的接收信号的一部分，以及选择电路，其基于所保留的接收信号等于信号的最大似然度的计算来选择OFDM符号 基于频道响应的副本。

公开(公告)号：US20060294170A1

公开(公告)日：2006-12-28

申请号：US11384497

申请日：2006-03-21

申请人： Hidehiro Matsuoka ,  Hideo Kasami ,  Makoto Tsuruta ,  Yasushi Murakami

发明人： Hidehiro Matsuoka ,  Hideo Kasami ,  Makoto Tsuruta ,  Yasushi Murakami

IPC分类号： G06F17/10

CPC分类号： H04L27/2647 ,  H04B7/0845 ,  H04B7/0848 ,  H04L25/0204

摘要： A diversity receiver device includes N antennas to receive OFDM signals, N digital filters to filter the signals received by the N antennas in order to reduce delay spread, K (K≦N) beamforming units configured to subject the filtered signals to a beamforming process by using combining weights, an eigen-decomposition unit configured to subject the filtered signals to eigen-decomposition to generate N eigenvalues, a weight setting unit configured to select K eigenvalues in descending order from the generated N eigenvalues in order to set eigenvectors corresponding to the K eigenvalues to the beamforming units as the combing weight, respectively, K FFT units configured to subject the output signals of the beamforming units to fast Fourier transformation to output FFT signals, and a diversity combining unit configured to combine the FFT signals.

摘要翻译： 分集接收机设备包括用于接收OFDM信号的N个天线，N个数字滤波器，以对由N个天线接收到的信号进行滤波，以便减少延迟扩展，K（K <= N）个波束形成单元，被配置为使滤波后的信号进行波束形成处理 通过使用组合权重，特征分解单元，被配置为对滤波后的信号进行本征分解以产生N个特征值;权重设置单元，被配置为从所生成的N个特征值以降序选择K个特征值，以便设置与本征值对应的特征向量 K个特征值分别作为梳理权重的KFT单元，被配置为使波束形成单元的输出信号经受快速傅里叶变换以输出FFT信号;以及分集合并单元，被配置为组合FFT信号。

公开(公告)号：US07305213B2

公开(公告)日：2007-12-04

申请号：US10810811

申请日：2004-03-29

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Tsuguhide Aoki ,  Kazumi Sato

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Tsuguhide Aoki ,  Kazumi Sato

IPC分类号： H04B1/00

CPC分类号： H04B1/707

摘要： A receiver comprising: an antenna which receives a radio signal including N possible symbols {c1(n), c2(n), . . . cM−1(n), cM(n)}, an N correlation units which are provided corresponding to the N possible symbols, respectively, each correlation unit detecting the degree of correlation with the radio signal received by the antenna, and a symbol determination unit which determines the symbol included in the radio signal received by the antenna based on the degree of correlation detected by the N correlation units. The N correlation units detect the degree of correlation between the radio signal received by the antenna and the N possible symbols represented by M chips {α0c1(n), α0c2(n)+α1c1(n), . . . , α0cM−1(n)+α1cM−2(n), α0cM(n)+α1cM−1(n)}.

摘要翻译： 一种接收机，包括：接收包括N个可能符号的无线电信号的天线，其中，n个可能的符号（n），。 。 。 （n），c（M），（N），N，N，N， 分别对应于N个可能的符号，每个相关单元检测与由天线接收的无线电信号的相关程度;以及符号确定单元，其基于相关程度确定由天线接收的无线电信号中包括的符号 由N个相关单元检测。 N个相关单元检测由天线接收的无线电信号与由M个码元（n）表示的N个可能符号之间的相关程度 ），α<0> 2 （n）+α1 C 1 / SUB> ^{（n），。 。 。 （n）M-1 M-2（M + 1） - - - - （1） （n）（n）（n） （n）M-1 （n）}。}

公开(公告)号：US20070297491A1

公开(公告)日：2007-12-27

申请号：US11846650

申请日：2007-08-29

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Tsuguhide Aoki ,  Kazumi Sato

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Tsuguhide Aoki ,  Kazumi Sato

IPC分类号： H04B1/00

CPC分类号： H04B1/707

摘要： A receiver comprising: an antenna which receives a radio signal including N possible symbols {c1(n), c2(n), cM−1(n), cM(n)}, an N correlation units which are provided corresponding to the N possible symbols, respectively, each correlation unit detecting the degree of correlation with the radio signal received by the antenna, and a symbol determination unit which determines the symbol included in the radio signal received by the antenna based on the degree of correlation detected by the N correlation units. The N correlation units detect the degree of correlation between the radio signal received by the antenna and the N possible symbols represented by M chips {α0c1(n),α0c2(n)+α1c1(n), . . . ,α0cM−1(n)+α1cM−2(n), α0cM(n)+α1cM−1(n)}.

摘要翻译： 一种接收机，包括：天线，其接收包括N个可能符号的无线电信号，其中，n个可能的符号（n），c（M），（c），（c） N个相关单元，分别与N个可能的符号对应地设置，每个相关单元检测与由天线接收的无线电信号的相关程度;以及符号确定单元，确定由天线接收的无线电信号中包括的符号 基于由N个相关单元检测到的相关程度。 N个相关单元检测由天线接收的无线电信号与由M个码元（n）表示的N个可能符号之间的相关程度 ），α<0> 2 （n）+α1 C 1 / SUB> ^{（n），。 。 。 （n）M-1 M-2（M + 1） - - - - （1） （n）（n）（n） （n）M-1 （n）}。}

公开(公告)号：US20070127361A1

公开(公告)日：2007-06-07

申请号：US11531190

申请日：2006-09-12

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Noritaka Deguchi ,  Seiichiro Horikawa

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Noritaka Deguchi ,  Seiichiro Horikawa

IPC分类号： H04J11/00

CPC分类号： H04L27/2647 ,  H04L27/2602

摘要： According to an aspect of the present invention, there is provided with an OFDM (Orthogonal Frequency Division Multiplexing) transmission apparatus, including: a subcarrier modulator configured to perform subcarrier modulation on a data sequence to generate subcarrier modulated signals; an IFFT unit configured to perform IFFT (Inverse Fast Fourier Transform) processing on the subcarrier modulated signals to generate a first OFDM symbol having a length corresponding to the number of FFT points at the IFFT processing; a symbol length shortener configured to obtain a part of the generated first OFDM symbol as a second OFDM symbol; and a transmitter configured to transmit the second OFDM symbol obtained to an other communication apparatus.

摘要翻译： 根据本发明的一个方面，提供了一种OFDM（正交频分复用）传输装置，包括：副载波调制器，被配置为对数据序列执行子载波调制以产生副载波调制信号; IFFT单元，被配置为对所述子载波调制信号执行IFFT（快速傅里叶逆变换）处理，以产生具有与所述IFFT处理中的FFT点数相对应的长度的第一OFDM符号; 符号长度缩短器，被配置为获得所生成的第一OFDM符号的一部分作为第二OFDM符号; 以及发送器，被配置为将获得的第二OFDM符号发送到另一通信装置。