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.

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filter which is generally identical to an adaptive finite impulse response filter, but with its delay elements having been replaced by all-pass filters.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.

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。

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。

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。

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。

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。

公开(公告)号：US5463660A

公开(公告)日：1995-10-31

申请号：US283172

申请日：1994-08-03

申请人： Atsushi Fukasawa ,  Manabu Kawabe ,  Akiyoshi Kawahashi ,  Takuro Sato

发明人： Atsushi Fukasawa ,  Manabu Kawabe ,  Akiyoshi Kawahashi ,  Takuro Sato

IPC分类号： H04J13/00 ,  H04B1/7107 ,  H04B1/69

CPC分类号： H04B1/71075

摘要： In a block-spreading code-division multiple-access communication system a demodulator stores received chip data in a separate memory area for each transmitting station. Each area has a capacity of at least two blocks. When a complete block is received from a transmitting station, all blocks of data stored in the corresponding memory area are correlated against a set of product codewords, which are obtained by spreading a set of orthogonal codewords by the transmitting station's spreading code, to find the codeword that gives the maximum correlation value. For the oldest block, this correlation value and information identifying the codeword are output. For all blocks, the maximum correlation value and corresponding product codeword are used to calculate interference correction data, which are subtracted from the data in other memory areas.

摘要翻译： 在块扩展码分多址通信系统中，解调器将接收到的码片数据存储在每个发送站的单独的存储区域中。 每个区域具有至少两个块的容量。 当从发送站接收到完整的块时，存储在对应的存储区域中的所有数据块与通过发送站的扩展码扩展一组正交码字而获得的一组乘积码字相关，以找到 给出最大相关值的码字。 对于最旧的块，输出该相关值和识别码字的信息。 对于所有块，使用最大相关值和相应的乘积码字来计算干扰校正数据，该数据从其他存储区域中的数据中减去。

公开(公告)号：US5394434A

公开(公告)日：1995-02-28

申请号：US141665

申请日：1993-10-26

申请人： Manabu Kawabe ,  Takuro Sato ,  Toshio Kato ,  Akiyoshi Kawahashi ,  Atsushi Fukasawa

发明人： Manabu Kawabe ,  Takuro Sato ,  Toshio Kato ,  Akiyoshi Kawahashi ,  Atsushi Fukasawa

IPC分类号： H04J13/00 ,  H04B1/7107 ,  H04K1/00

CPC分类号： H04B1/71075

摘要： A demodulator for code-division multiple-access spread-spectrum communications stores received chip data in a separate memory area for each transmitting station. Each area has a capacity of at least two symbols. When a complete symbol is received from a transmitting station, all chip data stored in the corresponding memory area are correlated with the corresponding spreading code, and estimated symbol values are derived from the correlated values. The correlated or estimated value of the oldest symbol is output as a demodulated value. The difference between each estimated symbol value and the previous estimate for the same symbol is multiplied by the spreading code to generate remaining interference values, which are subtracted from all chip data stored in memory areas for other transmitting stations, thereby updating those data.

摘要翻译： 用于码分多址扩频通信的解调器将接收的码片数据存储在每个发射站的单独的存储区域中。 每个区域具有至少两个符号的容量。 当从发送站接收到完整的符号时，存储在对应的存储区域中的所有芯片数据与对应的扩展码相关，并且从相关值导出估计的符号值。 输出最旧符号的相关或估计值作为解调值。 将每个估计符号值和相同符号的先前估计之间的差乘以扩展码，以产生剩余干扰值，该剩余干扰值从存储在其他发射站的存储区域中的所有芯片数据中减去，从而更新这些数据。

公开(公告)号：US4283697A

公开(公告)日：1981-08-11

申请号：US92670

申请日：1979-11-09

申请人： Yoshio Masuda ,  Atsushi Fukasawa ,  Jun Ashiwa ,  Takuro Sato

发明人： Yoshio Masuda ,  Atsushi Fukasawa ,  Jun Ashiwa ,  Takuro Sato

IPC分类号： H01P7/04 ,  H01P1/205 ,  H01P7/10 ,  H01P1/20 ,  H01P7/00

CPC分类号： H01P1/205

摘要： A high frequency filter for frequencies higher than the VHF band comprises a closed conductive housing, a pair of input and/or output means like an antenna provided at both the extreme ends of said housing, a plurality of resonators arranged on a straight line between said antennas, each of said resonators having an elongated inner conductor and a cylindrical dielectric body surrounding said inner conductor, one end of each of said resonators being fixed on the single plane of the housing and the other end of each of said resonators being free standing, and the length between each of the resonators being defined according to the specified coupling coefficient for the desired characteristics of the filter.The present filter utilizes the coupling effect between resonators by the displacement current relating to surface TM mode and the conductive current relating to TEM mode. Therefore, no coupling means for providing the coupling between resonators is provided.

摘要翻译： 用于高于VHF频带的频率的高频滤波器包括闭合导电壳体，一对输入和/或输出装置，类似于设置在所述壳体的两端的天线，多个谐振器，布置在所述 天线，每个所述谐振器具有细长的内部导体和围绕所述内部导体的圆柱形电介质体，每个所述谐振器的一端固定在所述壳体的单个平面上，并且每个所述谐振器的另一端是自由站立的， 并且每个谐振器之间的长度根据用于滤波器的期望特性的规定的耦合系数来定义。 本滤波器通过与表面TM模式相关的位移电流和与TEM模式有关的导电电流，利用谐振器之间的耦合效应。 因此，没有提供用于提供谐振器之间的耦合的耦合装置。