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1. 发明授权

US4916743A Pattern matching system 失效
标题翻译：模式匹配系统
公开(公告)号：US4916743A
公开(公告)日：1990-04-10
申请号：US186577
申请日：1988-04-27
申请人： Yumi Takizawa , Shinichi Sato , Atsushi Fukasawa , Takuro Sato , Hiromi Ando , Yukio Suzuki
发明人： Yumi Takizawa , Shinichi Sato , Atsushi Fukasawa , Takuro Sato , Hiromi Ando , Yukio Suzuki
IPC分类号： G10L15/00
CPC分类号： G10L15/00
摘要： A circuit for pattern matching on the frequency axis which inlcudes a first transformation section having an adaptive filter which is generally identical to an adaptive finite impulse response filter, but with its delay elements having been replaced by all-pass filters. The first transformation section performs frequency transformation on an input signal and is characterized by utilizing as tap coefficients for the adaptive filter, linear predictive analysis coefficients of the input speech signal. The first transformation section outputs linear predictive analysis coefficients of the frequency transformed input signal. A second transformation section is similar to the first transformation section but the tap coefficients of its adaptive filter are linear predictive analysis coefficients of a reference speech signal. A control section calculates a distance between the respective linear predictive analysis coefficients output from the first and second transformation sections, calculates controlling parameters of the filters of the all-pass filters of the transformation sections so as to minimize this distance, and generates a pattern matching residual output on the frequency axis.

2. 发明授权

US4961160A Linear predictive coding analysing apparatus and bandlimiting circuit therefor 失效
标题翻译：线性预测编码分析装置及其限幅电路
公开(公告)号：US4961160A
公开(公告)日：1990-10-02
申请号：US186576
申请日：1988-04-27
申请人： Shinichi Sato , Atsushi Fukasawa , Takuro Sato , Yasuo Shoji , Haruhiro Shiino , Yukio Suzuki , Hiromi Ando
发明人： Shinichi Sato , Atsushi Fukasawa , Takuro Sato , Yasuo Shoji , Haruhiro Shiino , Yukio Suzuki , Hiromi Ando
IPC分类号： G10L19/04 , G10L19/08
CPC分类号： G10L19/08
摘要： An LPC analyser calculates LPC coefficients using signals bandlimited to half the sampling frequency of the LPC coefficients to be calculated. Thef calculated LPC coefficients are continuous in time scale and free from aliasing distortion. A bandlimiting circuit suitable for use in the LPC analyser is also disclosed.

3. 发明授权

US5533012A Code-division multiple-access system with improved utilization of upstream and downstream channels 失效
标题翻译：码分多址系统，提高了上行和下行信道的利用率
公开(公告)号：US5533012A
公开(公告)日：1996-07-02
申请号：US401451
申请日：1995-03-09
申请人： Atsushi Fukasawa , Kenji Horiguchi , Takuro Sato , Hiroki Sugimoto , Yumi Takizawa
发明人： Atsushi Fukasawa , Kenji Horiguchi , Takuro Sato , Hiroki Sugimoto , Yumi Takizawa
IPC分类号： H04J13/00 , H04B1/7107 , H04J13/10 , H04J13/16 , H04W56/00 , H04W76/02 , H04B1/69
CPC分类号： H04B1/71072
摘要： A code-division multiple-access system has a downstream channel for transmission from a base station to a number of mobile stations, and an upstream channel for transmission from the mobile stations to the base station. On the downstream channel, each mobile station's spreading code is divided into two parts, which modulate data transmitted on in-phase and quadrature carriers, respectively, thereby enabling the length of the spreading code to be doubled without increasing the chip rate. On the upstream channel, as soon as a symbol is received from one mobile station, it is despread to estimate its value, then respread and canceled as interference with respect to the other mobile stations, these processes being iterated in a cyclic order of the mobile stations.
摘要翻译：码分多址系统具有用于从基站到多个移动站的传输的下行信道，以及用于从移动站到基站的传输的上行信道。在下游信道上，每个移动台的扩展码分为两部分，分别对同相和正交载波上传输的数据进行调制，从而使得扩展码的长度可以加倍，而不增加码片速率。在上游信道上，一旦从一个移动站接收到符号，就将其解扩以估计其值，然后作为对其他移动站的干扰而被重新发送和取消，这些进程按照移动台的循环次序进行迭代车站。

4. 发明授权

US4386328A High frequency filter 失效
标题翻译：高频滤波器
公开(公告)号：US4386328A
公开(公告)日：1983-05-31
申请号：US254071
申请日：1981-04-14
申请人： Yoshio Masuda , Atsushi Fukasawa , Takuro Sato , Tatsumasa Yoshida , Hiromi Ando
发明人： Yoshio Masuda , Atsushi Fukasawa , Takuro Sato , Tatsumasa Yoshida , Hiromi Ando
IPC分类号： H01P1/205 , H01P7/10 , H01P1/208 , H01P7/00
CPC分类号： H01P1/2056 , H01P7/10
摘要： A high frequency filter for frequencies higher than the VHF band comprising of a closed conductive housing (53), a pair of input and/or output means (54) like an antenna provided at both the extreme ends (53-5, 53-6) of said housing (53), a plurality of resonators (51-1 through 51-5, and 51a-1 through 51a-5) arranged on a straight line between said antennas (54), each of said resonators having an elongated inner conductor (51a-1 through 51a-5) with a circular cross section, and an elongated rectangular dielectric body (51-1 through 51-5) surrounding said inner conductor, one end of each of said resonators being fixed at the single plane (53-1) of the housing (53) and the other end of each of said resonators being free standing. The length of said inner conductor and the dielectric body is substantially 1/4 wavelength, and the duration (52-1 through 52-4 ) between two resonators is determined according to the specified coupling coefficient for the desired characteristics of the filter. Due to the rectangular dielectric body (51-1 through 51-5), each resonator is stably mounted on the housing (53), and then, the stable characteristics of the filter is obtained. Thus, the use in a vibrated circumstance like a mobile communication is possible. That rectangular dielectric body (51-1 through 51-5) also provides the larger coupling coefficients between resonators, and then, the wideband filter can be obtained.
摘要翻译：一种用于频率高于VHF频带的高频滤波器，包括封闭导电壳体（53），一对输入和/或输出装置（54），类似于设置在两端的天线（53-5,53-6 ），布置在所述天线（54）之间的直线上的多个谐振器（51-1至51-5和51a-1至51a-5），每个所述谐振器具有细长的内部具有圆形横截面的导体（51a-1至51a-5）和围绕所述内部导体的细长矩形电介质体（51-1至51-5），每个所述谐振器的一端固定在单个平面（53）的另一端，并且每个所述谐振器的另一端是独立的。所述内部导体和介电体的长度基本上为1/4波长，并且根据用于滤波器的期望特性的规定的耦合系数来确定两个谐振器之间的持续时间（52-1至52-4）。由于矩形电介质体（51-1至51-5），每个谐振器稳定地安装在壳体（53）上，然后获得滤波器的稳定特性。因此，可以在诸如移动通信的振动环境中使用。该矩形电介质体（51-1至51-5）也在谐振器之间提供较大的耦合系数，然后可获得宽带滤波器。

5. 发明授权

US5142581A Multi-stage linear predictive analysis circuit 失效
标题翻译：多级线性预测分析电路
公开(公告)号：US5142581A
公开(公告)日：1992-08-25
申请号：US447667
申请日：1989-12-08
申请人： Kiyohito Tokuda , Atsushi Fukasawa , Satoru Shimizu , Yumi Takizawa
发明人： Kiyohito Tokuda , Atsushi Fukasawa , Satoru Shimizu , Yumi Takizawa
IPC分类号： G10L15/02 , G10L11/00 , G10L19/04
CPC分类号： G10L19/08
摘要： Features are extracted from a sample input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.
摘要翻译：通过对样本值执行不同的第一阶数p的第一线性预测分析，并对第一分析的残差进行不同的第二阶数q的第二线性预测分析，从样本输入信号中提取特征。使用表示第二线性预测分析的残差的信息内容的信息熵值来选择最优的一阶和上行和下标。在这些信息熵值的变化的基础上选择一个或多个最优的第二个顺序和上下文。最优的第一和第二个订单作为特征输出。可以进行进一步的线性预测分析以获得更高阶的特征。即使对非稳态输入信号也可获得有用的特性。

6. 发明授权

US5243686A Multi-stage linear predictive analysis method for feature extraction from acoustic signals 失效
标题翻译：用于从声信号中提取特征的多级线性预测分析方法
公开(公告)号：US5243686A
公开(公告)日：1993-09-07
申请号：US870883
申请日：1992-04-20
申请人： Kiyohito Tokuda , Atsushi Fukasawa , Satoru Shimizu , Yumi Takizawa
发明人： Kiyohito Tokuda , Atsushi Fukasawa , Satoru Shimizu , Yumi Takizawa
CPC分类号： G10L15/02 , G10L19/08
摘要： Features are extracted from a sampled input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.
摘要翻译：通过对样本值执行不同的第一阶数p的第一线性预测分析，并且对第一分析的残差进行不同的第二阶数q的第二线性预测分析，从采样的输入信号中提取特征。使用表示第二线性预测分析的残差的信息内容的信息熵值来选择最优的一阶和上行和下标。在这些信息熵值的变化的基础上选择一个或多个最优的第二个顺序和上下文。最优的第一和第二个订单作为特征输出。可以进行进一步的线性预测分析以获得更高阶的特征。即使对非稳态输入信号也可获得有用的特性。

7. 发明授权

US4720829A Error control encoding system 失效
标题翻译：错误控制编码系统
公开(公告)号：US4720829A
公开(公告)日：1988-01-19
申请号：US848112
申请日：1986-04-04
申请人： Atsushi Fukasawa , Takuro Sato , Haruhiko Akiyama , Manabu Kawabe
发明人： Atsushi Fukasawa , Takuro Sato , Haruhiko Akiyama , Manabu Kawabe
IPC分类号： H04L1/16 , H03M13/03 , H04L1/00 , H04L1/12 , H04L1/18 , G06F11/10
CPC分类号： H04L1/1642 , H03M13/03 , H04L1/0007 , H04L1/0009 , H04L1/002 , H04L1/0026 , H04L1/0034 , H04L1/1809 , H04L2001/125
摘要： An error control encoding method and a mobile data communication system using the method in a moving body communication system such as mobile telephone for effecting data communication through a fading channel dominated by a burst error, upon receiving data transmitted from the transmitting side on the receiving side, detects any error involved in said received data as a frame error rate involved in block data or a bit error rate in the block data and thereby changes the frame length in response to the detected error rates. The mobile data communication system employs the error control encoding method wherein a frame length employed in the transmitting part is changed in response to the extent of any involved error in the received data detected by the remote receiving part.
摘要翻译：一种误差控制编码方法和移动数据通信系统，在移动电话机等移动体通信系统中，通过由接收侧的发送侧发送的数据，通过由突发错误支配的衰落信道进行数据通信，检测所述接收数据中涉及的任何错误，作为块数据中涉及的帧错误率或块数据中的误码率，从而根据检测到的错误率改变帧长度。移动数据通信系统采用错误控制编码方法，其中响应于由远程接收部分检测到的接收数据中涉及到的任何错误的程度，发送部分中使用的帧长度被改变。

8. 发明授权

US4255729A High frequency filter 失效
标题翻译：高频滤波器
公开(公告)号：US4255729A
公开(公告)日：1981-03-10
申请号：US37419
申请日：1979-05-09
申请人： Atsushi Fukasawa , Jun Ashiwa , Takuro Sato
发明人： Atsushi Fukasawa , Jun Ashiwa , Takuro Sato
IPC分类号： H01P1/205 , H01P1/201 , H01P7/00
CPC分类号： H01P1/2056
摘要： A high frequency filter for frequencies higher than the VHF band comprising at least one resonator has been found. Each resonator comprises a conductive housing, an inner conductor one end of which is fixed at the bottom of the housing and the other end of which is free standing, a cylindrical dielectric body surrounding said inner conductor, and the diameter of the dielectric body is approximately four times as large as that of said inner conductor.
摘要翻译：已经发现用于高于包括至少一个谐振器的VHF频带的频率的高频滤波器。每个谐振器包括导电壳体，内部导体，其一端固定在壳体的底部并且另一端自由站立，围绕所述内部导体的圆柱形介电体，并且电介质体的直径约为是所述内导体的四倍。

9. 发明授权

US4701923A Adaptively coded data communication system with half duplex and/or full duplex function 失效
标题翻译：具有半双工和/或全双工功能的自适应编码数据通信系统
公开(公告)号：US4701923A
公开(公告)日：1987-10-20
申请号：US818825
申请日：1986-01-14
申请人： Atsushi Fukasawa , Takuro Sato , Haruhiko Akiyama , Manabu Kawabe
发明人： Atsushi Fukasawa , Takuro Sato , Haruhiko Akiyama , Manabu Kawabe
IPC分类号： H03M13/03 , H04L1/00 , H04L1/16 , H04L1/18 , G06F11/00
CPC分类号： H04L1/1819 , H03M13/03 , H04L1/0009 , H04L1/0015 , H04L1/0025 , H04L1/0073
摘要： An error correcting encoding method and a vehicle data communication apparatus based on the same for use in data communication via fading communication channels dominated by burst errors in the data communication among vehicles such as automobiles are disclosed. The error correction encoding method detects, as data sent from a transmitting side is received by a receiving side, any error contained in the received data as a frame error rate of error frames involved in block data or a bit error rate of error bits involved in the block data and selects an error correcting code in response to the frame error rate for encoding. The vehicle data communication apparatus according to the present invention profitably employs the method, and changes an error correcting code to be used on the transmitting side in response to the extent of errors involved in the received data detected by the receiving side of a remote apparatus.
摘要翻译：公开了一种纠错编码方法和基于该数据通信的车辆数据通信装置，其通过由汽车等车辆之间的数据通信中的突发错误控制的衰落通信信道进行数据通信。误差校正编码方法检测由发送侧发送的数据由接收侧接收到的接收数据中包含的任何错误，作为块数据中涉及的错误帧的帧错误率或涉及的错误位的误码率块数据，并响应于用于编码的帧错误率选择纠错码。根据本发明的车辆数据通信装置有利地采用该方法，并且响应于由远程设备的接收侧检测到的接收数据中涉及的错误程度，改变在发送侧使用的纠错码。

10. 发明授权

US4692725A Dielectric filter having trimmable capacitor 失效
标题翻译：介质滤波器具有可调电容器
公开(公告)号：US4692725A
公开(公告)日：1987-09-08
申请号：US749185
申请日：1985-06-26
申请人： Atsushi Fukasawa , Kenichiro Hosoda , Takuro Sato , Tatumasa Yoshida
发明人： Atsushi Fukasawa , Kenichiro Hosoda , Takuro Sato , Tatumasa Yoshida
IPC分类号： H01P1/205 , H01P7/04
CPC分类号： H01P1/2056
摘要： A dielectric filter (FIG. 16) for frequencies higher than VHF band comprising a closed conductive housing (112), a pair of input and output means provided at both the extreme ends of said housing (112), a dielectric body (111) with a plurality of linear parallel grooves (118) arranged in said housing (112), a plurality of conductive linear means (113) with the length of approximately 1/4 wavelength mounted in said dielectric body (111) between said grooves (118) so that one end of said resonators (113) is fixed to the common plane of the housing (112), a capacitor means (114, 115) provided between the other end of resonators (111,113,118) and said conductive housing (112) so that an electrode (115) of said capacitor may be trimmed by a laser beam to adjust the resonating frequency of each of said resonators (111,113,118) and a plurality of conductive rods (137) provided in said grooves (118) for improving the spurious characteristics of the filter.
摘要翻译：用于高于VHF频带的频率的介质滤波器（图16），包括封闭的导电壳体（112），设置在所述壳体（112）的两端的一对输入和输出装置，具有布置在所述壳体（112）中的多个线性平行凹槽（118），多个导电线性装置（113），其长度约为1/4波长，安装在所述凹槽（118）之间的所述绝缘体（111）中，因此所述谐振器（113）的一端固定在壳体（112）的公共平面上，设置在谐振器（111,113,118）的另一端和所述导电壳体（112）之间的电容器装置（114,115），使得可以通过激光束对所述电容器的电极（115）进行修整，以调节每个所述谐振器（111,113,118）的谐振频率和设置在所述凹槽（118）中的多个导电棒（137），以改善所述谐振器过滤。

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