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1. 发明申请

US20060294170A1 Diversity receiver device 审中-公开
标题翻译：分集接收机设备
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。

2. 发明申请

US20060114814A1 Orthogonal frequency division demodulator, method and computer program product 失效
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.

3. 发明授权

US07627047B2 Orthogonal frequency division multiplexing (OFDM) receiver 失效
标题翻译：正交频分复用（OFDM）接收机
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。

4. 发明申请

US20060115011A1 Orthogonal frequency division multiplexing (OFDM) receiver 失效
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.

5. 发明授权

US07551548B2 OFDM demodulation apparatus, method and computer readable medium 失效
标题翻译： OFDM解调装置，方法和计算机可读介质
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。

6. 发明申请

US20060285482A1 OFDM demodulation apparatus, method and computer readable medium 失效
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.

7. 发明授权

US07570578B2 Orthogonal frequency division demodulator, method and computer program product 失效
标题翻译：正交频分解调制器，方法和计算机程序产品
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。

8. 发明申请

US20080310566A1 FREQUENCY SYNCHRONIZING CIRCUIT, METHOD, AND RECEIVING APPARATUS USING THE CIRCUIT AND THE METHOD 审中-公开
标题翻译：使用电路的频率同步电路，方法和接收装置及其方法
公开(公告)号：US20080310566A1
公开(公告)日：2008-12-18
申请号：US12054609
申请日：2008-03-25
申请人： Makoto Tsuruta , Jun Mitsugi , Hidehiro Matsuoka , Mikihiro Yamazaki , Shizuo Akiyama
发明人： Makoto Tsuruta , Jun Mitsugi , Hidehiro Matsuoka , Mikihiro Yamazaki , Shizuo Akiyama
IPC分类号： H04B1/10 , H03L7/00
CPC分类号： H04L27/2657 , H03J7/02 , H03J2200/02 , H04L27/0014 , H04L27/266 , H04L2027/003 , H04L2027/0046 , H04L2027/0055 , H04L2027/0063 , H04L2027/0079
摘要： A frequency synchronizing circuit includes a first raising unit configured to raise a received signal by a first power to obtain a first raised signal, a filter to suppress noise in the first raised signal to obtain a filtered signal, a second raising unit configured to raise the filtered signal by a second power to obtain a second raised signal, an estimating unit configured to estimate a frequency offset in the received signal based on the second raised signal to obtain an estimated value, and an offset-cancelling unit configured to cancel the estimated value from the received signal, to output an offset cancelled signal.
摘要翻译：频率同步电路包括：第一提升单元，被配置为通过第一功率提高接收信号以获得第一升高信号;滤波器，用于抑制第一升高信号中的噪声以获得滤波信号;第二升高单元，滤波后的信号以获得第二升高信号，估计单元，被配置为基于所述第二升高信号估计所述接收信号中的频率偏移，以获得估计值;以及偏移消除单元，被配置为抵消所述估计值从接收到的信号中输出偏移消除信号。

9. 发明申请

US20080304589A1 WIRELESS RECEIVER, METHOD FOR CONTROLLING THE WIRELESS RECEIVER, PROGRAM FOR CONTROLLING THE WIRELESS RECEIVER, AND SEMICONDUCTOR INTEGRATED CIRCUIT 审中-公开
标题翻译：无线接收器，无线接收机的控制方法，无线接收机的控制程序和半导体集成电路
公开(公告)号：US20080304589A1
公开(公告)日：2008-12-11
申请号：US12052171
申请日：2008-03-20
申请人： Makoto Tsuruta , Jun Mitsugi , Hidehiro Matsuoka
发明人： Makoto Tsuruta , Jun Mitsugi , Hidehiro Matsuoka
IPC分类号： H04L27/28 , H04B1/10
CPC分类号： H04L27/2647 , H04B7/0888 , H04L25/022 , H04L25/03159 , H04L2025/03681
摘要： According to an embodiment of the invention, a wireless receiving apparatus includes: an antenna that receives an OFDM signal having an OFDM symbol and a guard interval; a front end section that performs frequency conversion and synchronization on the received OFDM signal; an ISI canceller that extracts a delay profile and removes leakage of the guard interval into the OFDM symbol by the use of the delay profile; a converter that performs orthogonal conversion on the ISI removed OFDM signal; an equalization section that performs equalization processing on the converted OFDM signal; an outer decoder that decodes the equalized OFDM signal; and an inner decoder that corrects an error in an inner code of the decoded OFDM signal, wherein the equalization section performs re-equalization processing on the converted OFDM signal by using a signal output from the inner decoder as the reference signal.
摘要翻译：根据本发明的实施例，无线接收装置包括：天线，其接收具有OFDM符号和保护间隔的OFDM信号; 对所接收的OFDM信号进行频率变换和同步的前端部; ISI消除器，其提取延迟分布，并通过使用延迟分布来将保护间隔的泄漏消除到OFDM符号中; 在ISI去除的OFDM信号上执行正交转换的转换器; 对所述转换后的OFDM信号进行均衡处理的均衡部; 解码均衡的OFDM信号的外部解码器; 以及内部解码器，其校正所述解码的OFDM信号的内部代码中的错误，其中所述均衡部分通过使用从所述内部解码器输出的信号作为参考信号，对经转换的OFDM信号执行重新均衡处理。

10. 发明授权

US08240676B2 Piston ring 有权
标题翻译：活塞环
公开(公告)号：US08240676B2
公开(公告)日：2012-08-14
申请号：US12280904
申请日：2007-02-27
申请人： Tomotaka Kariya , Hideshi Hitosugi , Makoto Tsuruta
发明人： Tomotaka Kariya , Hideshi Hitosugi , Makoto Tsuruta
IPC分类号： F16J9/26
CPC分类号： F16J9/26 , C23C30/00
摘要： There is provided a piston ring which can effectively prevent aluminum adhesion phenomenon to the piston ring.The piston ring includes a piston ring main body and a surface coating film on either upper or lower surface of the piston ring main body, or both the upper and lower surfaces of the piston ring. The surface coating film includes heat-resistant resin and copper based powder contained therein.
摘要翻译：提供了一种可有效防止活塞环铝粘附现象的活塞环。活塞环包括活塞环主体和活塞环主体的上表面或下表面上的表面涂层膜，或活塞环的上表面和下表面两者。表面涂膜包括耐热树脂和其中所含的铜基粉末。

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