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1. 发明授权

US08180004B2 Method for estimating amount of distortion in CFO and DCO, method for compensating received signals using the same, and receiver 失效
标题翻译：用于估计CFO和DCO中的失真量的方法，用于使用其来补偿接收信号的方法和接收机
公开(公告)号：US08180004B2
公开(公告)日：2012-05-15
申请号：US12740028
申请日：2008-11-05
申请人： Hai Lin , Katsumi Yamashita
发明人： Hai Lin , Katsumi Yamashita
IPC分类号： H04L1/00
CPC分类号： H04L27/2657 , H04L27/2675
摘要： A received signal delivered through a transmission line can be compensated for carrier frequency offset and direct-current offset to improve the signal-to-noise ratio of the received signal, eventually resulting in an effective improvement in the error rate. The received signal has convoluted influences through the transmission line, so that observation of continual symbols of periodic pilot signals on the frequency axis shows just a phase shift by the carrier frequency offset. Therefore, the carrier frequency offset can be analytically found from the continual symbols of periodic pilot signals, thereby allowing the direct-current offset to be estimated and both the carrier frequency offset and the direct-current offset to be compensated for.
摘要翻译：通过传输线传送的接收信号可以补偿载波频率偏移和直流偏移，以改善接收信号的信噪比，最终导致误码率的有效改善。接收到的信号通过传输线路产生卷积影响，从而观察频率轴上周期性导频信号的连续符号只显示载波频率偏移的相移。因此，可以从周期性导频信号的连续符号中分析地发现载波频率偏移，从而允许估计直流偏移，并补偿载波频率偏移和直流偏移。

2. 发明申请

US20100246723A1 METHOD FOR ESTIMATING AMOUNT OF DISTORTION IN CFO AND DCO, METHOD FOR COMPENSATING RECEIVED SIGNALS USING THE SAME, AND RECEIVER 失效
标题翻译：用于估计CFO和DCO中的失真量的方法，用于对使用其的接收信号进行补偿的方法和接收器
公开(公告)号：US20100246723A1
公开(公告)日：2010-09-30
申请号：US12740028
申请日：2008-11-05
申请人： Hai Lin , Katsumi Yamashita
发明人： Hai Lin , Katsumi Yamashita
IPC分类号： H04B1/10 , H04L25/06
CPC分类号： H04L27/2657 , H04L27/2675
摘要： A received signal delivered through a transmission line can be compensated for CFO and DCO to improve the SNR of the received signal, eventually resulting in an effective improvement in the error rate. In this context, methods for estimating and compensating for CFO and DCO have been studied, for example, using pilot signals or a blind method. However, the methods would require a huge amount of calculations for the estimation of CFO in the presence of DCO, as with the ML method, or never essentially eliminate errors from an estimated value. The received signal has convoluted influences through the transmission line, so that observation of the continual symbols of periodic pilot signals on the frequency axis shows just a phase shift by the CFO. Therefore, the CFO can be analytically found from the continual symbols of periodic pilot signals, thereby allowing the DCO to be estimated and both the CFO and the DCO to be compensated for.
摘要翻译：通过传输线传送的接收信号可以补偿CFO和DCO，以改善接收信号的SNR，最终导致错误率的有效改善。在这方面，已经研究了用于估计和补偿CFO和DCO的方法，例如使用导频信号或盲法。然而，如同ML方法一样，这些方法将需要大量的计算，以便在存在DCO的情况下估计CFO，或从不从本质上消除估计值的误差。接收到的信号通过传输线路产生卷积影响，从而在频率轴上观察到周期性导频信号的连续符号只是CFO的相移。因此，可以从周期性导频信号的连续符号中分析地找到CFO，从而允许估计DCO，并且补偿CFO和DCO。

3. 发明申请

US20100208783A1 METHOD FOR CALCULATING CFO AND I/Q IMBALANCE COMPENSATION COEFFICIENTS, COMPENSATION METHOD USING THE SAME, AND METHOD FOR TRANSMITTING PILOT SIGNAL 审中-公开
标题翻译：用于计算CFO和I / Q不平衡补偿系数的方法，使用该方法的补偿方法和用于发送引导信号的方法
公开(公告)号：US20100208783A1
公开(公告)日：2010-08-19
申请号：US12679581
申请日：2008-09-27
申请人： Hai Lin , Katsumi Yamashita
发明人： Hai Lin , Katsumi Yamashita
IPC分类号： H04B17/00 , H04L27/22 , H04J3/00
CPC分类号： H04L27/2657 , H04L27/2613 , H04L27/2675 , H04L27/3863 , H04L2027/0016 , H04L2027/0024 , H04L2027/0091
摘要： The OFDM scheme based communication system is currently being put into practical use because of its effective use of frequencies and its enhanced resistance to multipath. However, since the OFDM scheme treats multiplexed signals with overlapped spectra, the orthogonality between carriers are corrupted and the error rate characteristic is degraded in the presence of CFO. Furthermore, since locally oscillated signals different by a phase of π/2 are difficult to obtain in demodulating the I/Q signal, an imbalance is caused between the I/Q signals, resulting in degradation in the error rate characteristic. The invention suggests a novel pilot signal, and a method for analytically determining compensation values for CFO and I/Q imbalance and compensating for those distortions using the resulting values. Furthermore, the invention is applicable not only to the OFDM scheme but also to any protocol that involves pilot signals.
摘要翻译：基于OFDM方案的通信系统目前正在投入实际使用，因为它有效地利用了频率并增强了对多路径的抵抗力。然而，由于OFDM方案用重叠频谱处理多路复用信号，所以载波之间的正交性被破坏，并且在存在CFO的情况下错误率特性降低。此外，由于在解调I / Q信号时难以获得与pgr / / 2的相位不同的局部振荡信号，所以在I / Q信号之间引起不平衡，导致误码率特性的劣化。本发明提出了一种新颖的导频信号，以及用于分析地确定CFO和I / Q不平衡的补偿值并使用所得到的值来补偿那些失真的方法。此外，本发明不仅适用于OFDM方案，而且也适用于涉及导频信号的任何协议。

4. 发明申请

US20110206105A1 METHOD FOR DETERMINING HYBRID DOMAIN COMPENSATION PARAMETERS FOR ANALOG LOSS IN OFDM COMMUNICATION SYSTEMS AND COMPENSATING FOR THE SAME 审中-公开
标题翻译：用于确定OFDM通信系统中模拟丢失的混合域补偿参数的方法及其相互补偿
公开(公告)号：US20110206105A1
公开(公告)日：2011-08-25
申请号：US13125881
申请日：2009-11-02
申请人： Hai Lin , Katsumi Yamashita
发明人： Hai Lin , Katsumi Yamashita
IPC分类号： H04B17/00 , H04L27/01
CPC分类号： H04B7/0851 , H04B7/0426 , H04B7/0854
摘要： In a transmit/receive system, the carrier frequency offset (CFO), I/Q imbalance, and DC offset (DCO) can cause serious signal distortions. These analog losses can be compensated for individually or in combination of any two of them by following various methods that have been suggested. However, there have suggested no methods of simultaneously compensating, for these three types of losses that occur in actual devices at the same time. The present invention suggests a novel pilot signal that has a cyclic signal portion and a portion of two equally spaced continual signals. The invention provides a method for compensating for the CFO, I/Q imbalance, and DCO by simultaneously performing the time domain compensation and the channel estimation using those signal portions. The method also compensates for the I/Q imbalance and the channel response on the transmitter side in the OFDM scheme.
摘要翻译：在发送/接收系统中，载波频率偏移（CFO），I / Q不平衡和DC偏移（DCO）可能导致严重的信号失真。这些模拟损失可以通过遵循已经提出的各种方法单独地或通过其中任何两个的组合来补偿。然而，对于同时在实际装置中发生的这三种类型的损耗，没有提出同时补偿的方法。本发明提出了一种新颖的导频信号，其具有循环信号部分和两个等间隔的连续信号的一部分。本发明提供了一种用于通过同时执行时域补偿和使用这些信号部分的信道估计来补偿CFO，I / Q不平衡和DCO的方法。该方法还补偿OFDM方案中发射机侧的I / Q不平衡和信道响应。

5. 发明申请

US20100177851A1 COMPENSATION METHOD, PROGRAM, RECORDING MEDIUM, AND RECEIVER FOR OFDM SIGNAL HAVING CFO AND DCO 审中-公开
标题翻译：具有CFO和DCO的OFDM信号的补偿方法，程序，记录介质和接收器
公开(公告)号：US20100177851A1
公开(公告)日：2010-07-15
申请号：US12665455
申请日：2008-06-19
申请人： Hai Lin , Katsumi Yamashita
发明人： Hai Lin , Katsumi Yamashita
IPC分类号： H04L25/06 , H04L27/06
CPC分类号： H04L25/03343 , H04L25/06 , H04L27/2657 , H04L27/2676
摘要： A frequency offset (CFO) and a direct current component offset (DCO) occur in an OFDM scheme signal. To address this, such a method has been suggested which allows a pilot signal to be mixed with a communicated signal for compensation. However, if the pilot signal has a long duration, then a compensation method without the pilot signal is required to compensate signals during that period. However, no such a method is conventionally available which compensates for both the CFO and DCO without the pilot signal. Using the orthogonality of the OFDM signal, the matrix of a system in which CDO and DCO have occurred is subjected to the singular value decomposition, thereby predetermining the CFO candidate value which allows for demodulating zero from the received signal and an array of numerical values of CFO check data. Then, in a compensation section (17), the received signal is successively multiplied by the numerical values. The typical CFO value provided when the minimum value has been demodulated is outputted as an estimate value for compensation.
摘要翻译：在OFDM方案信号中出现频率偏移（CFO）和直流分量偏移（DCO）。为了解决这个问题，已经提出了这样的方法，其允许将导频信号与通信信号混合以进行补偿。然而，如果导频信号具有较长的持续时间，则需要不具有导频信号的补偿方法来补偿该期间的信号。然而，没有这种传统上可用的方法来补偿没有导频信号的CFO和DCO。使用OFDM信号的正交性，其中发生CDO和DCO的系统的矩阵经受奇异值分解，从而预先确定允许从接收信号中解调零的CFO候选值和数字值 CFO检查数据。然后，在补偿部（17）中，将接收信号依次乘以数值。当解调最小值时提供的典型CFO值作为补偿的估计值被输出。

6. 发明申请

US20100054963A1 VARIABLE DISPLACEMENT ROTARY PUMP 有权
标题翻译：可变位移旋转泵
公开(公告)号：US20100054963A1
公开(公告)日：2010-03-04
申请号：US12546438
申请日：2009-08-24
申请人： Hironao Yokoi , Shigeru Suzuki , Katsumi Yamashita , Toshiro Fujii
发明人： Hironao Yokoi , Shigeru Suzuki , Katsumi Yamashita , Toshiro Fujii
IPC分类号： F04B49/24
CPC分类号： F04C11/001 , F04C14/02 , F04C14/065 , F04C14/26 , F04C2270/58
摘要： A variable displacement rotary pump includes a main pump unit, an auxiliary pump unit, a discharge passage, a bypass passage, a suction passage, a check valve and a control valve. The suction passage is in communication with the discharge passage through the bypass passage and a second discharge port. The check valve is disposed in the discharge passage for preventing fluid in a first discharge port of the main pump unit from flowing into the bypass passage. The control valve is operable for opening and closing the bypass passage. When the control valve opens the bypass passage and the check valve closes the discharge passage, flow rate of the fluid discharged from the discharge passage is reduced. A throttle passage is provided in the bypass passage or the control valve for regulating flow of the fluid in early phase of operation of the control valve to open the bypass passage.
摘要翻译：可变排量旋转泵包括主泵单元，辅助泵单元，排出通道，旁通通道，吸入通道，止回阀和控制阀。吸入通路与通过旁路通路的排出通路和第二排出口连通。止回阀设置在排出通道中，用于防止主泵单元的第一排出口中的流体流入旁通通道。控制阀可操作以打开和关闭旁路通道。当控制阀打开旁通通道并且止回阀关闭排出通道时，从排出通道排出的流体的流量减小。在旁通通道或控制阀中设置有节流通道，用于调节控制阀的早期操作中的流体的流动以打开旁路通道。

7. 发明申请

US20090208358A1 VARIABLE DISPLACEMENT GEAR PUMP 有权
标题翻译：变速齿轮泵
公开(公告)号：US20090208358A1
公开(公告)日：2009-08-20
申请号：US12370083
申请日：2009-02-12
申请人： Katsumi Yamashita , Shigeru Suzuki , Hironao Yokoi , Toshiro Fujii
发明人： Katsumi Yamashita , Shigeru Suzuki , Hironao Yokoi , Toshiro Fujii
IPC分类号： F01C1/14
CPC分类号： F04C2/18 , F04C14/065
摘要： The variable displacement gear pump for a loading system in an industrial vehicle has main and sub gear pump portions, suction, discharge and bypass passages, and check and opening valves. The main gear pump portion has main drive and driven gears, and has suction and discharge side spaces. The sub gear pump portion has sub drive and driven gears, and has suction and discharge side spaces. The bypass passage returns hydraulic fluid in the discharge-side space of the sub gear pump portion to the suction passage. The check valve prevents hydraulic fluid in the discharge-side space of the main gear pump portion from flowing to that of the sub gear pump portion. The opening valve is used for opening and closing the bypass passage, and closes the bypass passage due to a pressure in a discharge conduit of the loading system increased by the load applied to the loading system.
摘要翻译：用于工业车辆中的装载系统的可变排量齿轮泵具有主副齿轮泵部分，抽吸，排放和旁通通道以及检查和打开阀。主齿轮泵部分具有主驱动齿轮和从动齿轮，并且具有抽吸和排出侧空间。副齿轮泵部分具有副驱动齿轮和从动齿轮，并且具有吸入和排出侧空间。旁路通路将副齿轮泵部的排出侧空间的液压流体返回到吸入通路。止回阀防止主齿轮泵部分的排出侧空间中的液压流体流向副齿轮泵部分的液压流体。打开阀用于打开和关闭旁路通道，并且由于加载系统的排放管道中的压力增加到施加到装载系统的负载而使旁通通道关闭。

8. 发明授权

US06580541B1 System and method for transmitting information for amphibious traveling vehicle and system for controlling operation of the vehicle 失效
标题翻译：用于传输水陆两用行驶车辆信息的系统和方法以及用于控制车辆操作的系统
公开(公告)号：US06580541B1
公开(公告)日：2003-06-17
申请号：US09155005
申请日：1998-12-18
申请人： Katsumi Yamashita , Kenjiro Futami
发明人： Katsumi Yamashita , Kenjiro Futami
IPC分类号： H04B1000
CPC分类号： B63H21/21 , B60F3/0007 , B63H19/08 , B63H21/22 , B63H2025/028
摘要： In order to allow an amphibious traveling vehicle to safely travel along rails on the land and in the water, or underwater even off the rails, a system for transmitting information of amphibious traveling vehicle comprising a traveling vehicle-side control system (51) which controls the operating state of the traveling vehicle and is provided on the traveling vehicle for traveling under water or underwater and in the air, a host-side control system (53) which instructs the system (51) to operate the traveling vehicle and is provided separately from the traveling vehicle, and communication means (60 and 61) which transmit information between the systems (51 and 53) and are connected to these systems (51 and 53), said system being characterized in that said communication means (60 and 61) is constituted of modulators (54 and 55) which modulate received instruction information into light beams, demodulators (56 and 57) which demodulate received beams of light into the instruction information and a light beam transmitter/receiver (58 and 59), wherein the information transmission between the systems (51 and 53) can be performed with light beams.
摘要翻译：为了允许水陆两用的行驶车辆沿着轨道在陆地上，水下或水下甚至轨道上安全地行驶，用于传输水陆两用行驶车辆的信息的系统包括行驶车辆侧控制系统（51），其控制行驶车辆的操作状态设置在行驶车辆上，在水下或水下以及空中行驶，主机侧控制系统（53）指示系统（51）操作行驶车辆并分开设置以及在系统（51和53）之间传送信息并且连接到这些系统（51和53）的通信装置（60和61），所述系统的特征在于所述通信装置（60和61）由将调制器（54和55）调制到光束中的调制器（54和55），解调器（56和57）将接收到的光束解调成指令信息离子和光束发射器/接收器（58和59），其中系统（51和53）之间的信息传输可以用光束执行。

9. 发明申请

US20090041593A1 VARIABLE DISPLACEMENT TYPE GEAR PUMP 审中-公开
标题翻译：可变位移型齿轮泵
公开(公告)号：US20090041593A1
公开(公告)日：2009-02-12
申请号：US12186625
申请日：2008-08-06
申请人： Hironao Yokoi , Shigeru Suzuki , Katsumi Yamashita , Toshiro Fujii , Masaki Ota , Kazuo Murakami
发明人： Hironao Yokoi , Shigeru Suzuki , Katsumi Yamashita , Toshiro Fujii , Masaki Ota , Kazuo Murakami
IPC分类号： F04C14/26 , F04C2/14
CPC分类号： F04C11/001 , F04C2/086 , F04C2/18 , F04C14/065 , F04C14/26 , F04C2240/30
摘要： A variable displacement type gear pump has gear chambers, one of which is a specific gear chamber. A suction passage is formed in the housing so as to communicate with suction-side spaces. An outlet passage communicates with discharge-side spaces. A return passage returns the fluid discharged to the discharge-side space of the specific gear chamber to the suction passage. The return passage communicates with the suction passage at a confluence portion located upstream side of the suction-side space. An opening and closing valve opens the return passage in a small displacement operational state. A check valve is located between the discharge-side space of the specific gear chamber and the outlet passage for preventing the fluid discharged from the gear chamber other than the specific gear chamber from flowing into the discharge-side space of the specific gear chamber in the small displacement operational state.
摘要翻译：可变排量式齿轮泵具有齿轮室，其中一个是特定齿轮室。吸入通道形成在壳体中以与吸入侧空间连通。出口通道与排放侧空间连通。返回通道将排出到特定齿轮室的排放侧空间的流体返回到吸入通道。返回通道在位于吸入侧空间上游侧的汇合部分处与吸入通道连通。打开和关闭阀在小排量操作状态下打开返回通道。止回阀位于特定齿轮室的排出侧空间和出口通道之间，用于防止从特定齿轮室以外的齿轮室排出的流体流入特定齿轮室的排出侧空间小排量运行状态。

10. 发明授权

US08348635B2 Variable displacement gear pump 有权
标题翻译：可变排量齿轮泵
公开(公告)号：US08348635B2
公开(公告)日：2013-01-08
申请号：US12370083
申请日：2009-02-12
申请人： Katsumi Yamashita , Shigeru Suzuki , Hironao Yokoi , Toshiro Fujii
发明人： Katsumi Yamashita , Shigeru Suzuki , Hironao Yokoi , Toshiro Fujii
IPC分类号： F01C1/14
CPC分类号： F04C2/18 , F04C14/065
摘要： The variable displacement gear pump for a loading system in an industrial vehicle has main and sub gear pump portions, suction, discharge and bypass passages, and check and opening valves. The main gear pump portion has main drive and driven gears, and has suction and discharge side spaces. The sub gear pump portion has sub drive and driven gears, and has suction and discharge side spaces. The bypass passage returns hydraulic fluid in the discharge-side space of the sub gear pump portion to the suction passage. The check valve prevents hydraulic fluid in the discharge-side space of the main gear pump portion from flowing to that of the sub gear pump portion. The opening valve is used for opening and closing the bypass passage, and closes the bypass passage due to a pressure in a discharge conduit of the loading system increased by the load applied to the loading system.
摘要翻译：用于工业车辆中的装载系统的可变排量齿轮泵具有主副齿轮泵部分，抽吸，排放和旁通通道以及检查和打开阀。主齿轮泵部分具有主驱动齿轮和从动齿轮，并且具有抽吸和排出侧空间。副齿轮泵部分具有副驱动齿轮和从动齿轮，并且具有吸入和排出侧空间。旁路通路将副齿轮泵部的排出侧空间的液压流体返回到吸入通路。止回阀防止主齿轮泵部分的排出侧空间中的液压流体流向副齿轮泵部分的液压流体。打开阀用于打开和关闭旁路通道，并且由于加载系统的排放管道中的压力增加到施加到装载系统的负载而使旁通通道关闭。

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