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21. 发明授权

US4305133A Recursive type digital filter 失效
标题翻译：递归式数字滤波器
公开(公告)号：US4305133A
公开(公告)日：1981-12-08
申请号：US94915
申请日：1979-11-16
申请人： Eiichi Amada , Makoto Ohnishi , Hiroshi Kuwahara
发明人： Eiichi Amada , Makoto Ohnishi , Hiroshi Kuwahara
IPC分类号： H03H17/00 , H03H17/04 , G06F15/31 , G06F7/48
CPC分类号： H03H17/0405 , H03H17/0461
摘要： A recursive type digital filter receiving a digital input signal x(n) having a plurality of bits and delivering a ditial output signal y(n) satisfying the following equation, ##EQU1## where n indicates a natural number, M and N orders of time lag in the signal transference, a.sub.k and b.sub.k coefficients defined by a filter characteristic, a.sub.M and b.sub.N b being coefficients which are not equal to zero, comprises an output control circuit for delivering a digital signal indicating a positive or negative limit value in place of the digital output signal y(n) when the amplitude of the signal y(n) exceeds an allowable value. In combination with this output control circuit, the filter also utilizes a feedback signal for calculation purposes which feedback signal has its amplitude reduced from that of y(n) by a predetermined ratio. Further, an arrangement is provided for clearing registers of filter when necessary to prevent overflow oscillation.
摘要翻译：接收具有多个位的数字输入信号x（n）的递归型数字滤波器，并输出满足以下等式的初始输出信号y（n），其中n表示自然数，M和N个时间顺序信号传输滞后，由滤波器特性aM和bN b定义的ak和bk系数是不等于零的系数，包括输出控制电路，用于传送指示正或负极限值的数字信号代替数字输出信号y（n），当信号y（n）的振幅超过允许值时。与该输出控制电路相结合，滤波器还利用反馈信号进行计算，将反馈信号的幅度从y（n）的幅度减小预定比例。此外，为了防止溢出振荡，需要设置清除滤波器的寄存器的结构。

22. 发明授权

US4608464A Interface circuit interconnecting a bidirectional two-wire line with unidirectional four-wire lines 失效
标题翻译：接口电路将双向双线线路与单向四线制线路互连
公开(公告)号：US4608464A
公开(公告)日：1986-08-26
申请号：US605904
申请日：1984-05-01
申请人： Yuichi Morikawa , Hirohiko Sato , Eiichi Amada , Toshiro Suzuki , Hirotoshi Shirasu , Hiroshi Kuwahara
发明人： Yuichi Morikawa , Hirohiko Sato , Eiichi Amada , Toshiro Suzuki , Hirotoshi Shirasu , Hiroshi Kuwahara
IPC分类号： H04B3/03 , H04B3/20 , H04B3/23 , H04B1/58
CPC分类号： H04B3/03 , H04B3/23
摘要： In an interface circuit which couples a two-wire line of bidirectional transmission and unidirectional four-wire receiving and transmitting lines; in order to permit the interface circuit to operate in adaptation to the fluctuation of an impedance with the two-wire line side viewed from the four-wire receiving line, the four-wire receiving line is provided with a plurality of filters and a group of switches for selecting the filters, an output of the four-wire transmitting line is compared with outputs obtained by scanning the filters, and the filter providing the minimum output difference in the comparisons is selected and connected.
摘要翻译：在耦合双向传输双线线路和单向四线接收和发射线路的接口电路中; 为了允许接口电路适应于从四线接收线观察到的双线线路的阻抗的波动，四线接收线路设置有多个滤波器和一组用于选择滤波器的开关，将四线传输线的输出与通过扫描滤波器获得的输出进行比较，并选择并连接提供比较中最小输出差的滤波器。

23. 发明授权

US5537414A Method of wireless communication between base station and mobile station and multiple access communication system 失效
标题翻译：基站与移动台和多址通信系统之间的无线通信方法
公开(公告)号：US5537414A
公开(公告)日：1996-07-16
申请号：US87080
申请日：1993-07-07
申请人： Yoshihiro Takiyasu , Eiichi Amada , Hidehiko Jusa , Tomoaki Ishifuji , Shuichi Adachi , Genichi Ishii
发明人： Yoshihiro Takiyasu , Eiichi Amada , Hidehiko Jusa , Tomoaki Ishifuji , Shuichi Adachi , Genichi Ishii
IPC分类号： H04Q7/38 , H04B7/26 , H04J3/16 , H04L12/28 , H04Q1/30 , H04Q3/58
CPC分类号： H04B7/2656 , H04J3/1694
摘要： In a communication system having a base station for controlling a transmission right and a plurality of substations, a substation having data to be transmitted transmits the number of necessary fragments and its address to a request field of a communication frame. The base station uses a plurality pair of fragment slots and reply slots following the request field in the communication frame to transmit an address of a substation permitted to transmit data, to each fragment slot. The substation permitted to transmit data transmits the address of a destination substation and the data to a predetermined field following the address in one fragment slot. The destination station transmits a reply signal indicating the reception state of the data to the reply slot paired with the fragment slot. If the base station detects from the reply signal that the destination station failed in receiving the data, the base station instead of the substation first transmitted the data transmits the destination address and data received at the fragment slot to the next fragment slot.
摘要翻译：在具有用于控制发送权限的基站和多个变电站的通信系统中，具有要发送的数据的变电站将通信帧的请求字段的必要片段数及其地址发送。基站使用通信帧中的请求字段之后的多对片段时隙和应答时隙，将允许发送数据的子站的地址发送到每个片段时隙。允许发送数据的变电站将目的地变电站的地址和数据发送到在一个分段时隙中的地址之后的预定字段。目的站将表示数据的接收状态的应答信号发送到与分段时隙配对的应答时隙。如果基站从应答信号中检测到目的站在接收数据失败，则基站而不是先发送数据的分站将目的地址和在分片时隙接收到的数据发送到下一个分片时隙。

24. 发明授权

US4796296A PCM coder and decoder having function of two-wire/four-wire conversion 失效
标题翻译： PCM编码器和解码器具有双线/四线转换功能
公开(公告)号：US4796296A
公开(公告)日：1989-01-03
申请号：US739295
申请日：1985-05-30
申请人： Eiichi Amada , Kazuo Yamakido , Takahiko Kozaki , Shigeo Nishita , Masaru Kokubo
发明人： Eiichi Amada , Kazuo Yamakido , Takahiko Kozaki , Shigeo Nishita , Masaru Kokubo
IPC分类号： H04B1/58 , H04B3/23
CPC分类号： H04B3/23 , H04B1/586
摘要： A CODEC including a coder and decoder to construct the subscriber's circuit of a digital telephone switching system or the like, wherein an analogue balancing circuit is provided between the output terminal of a post-filter and the input terminal of a pre-filter in order to effectively eliminate a return signal in the case of two-wire/four-wire conversion, and return signals not eliminated by the analogue balancing circuit are further eliminated by a digital balancing circuit.Especially in the present invention, the analogue balancing circuit is so constructed that its characteristics are independent of frequencies, and hence, the analogue balancing circuit and the digital balancing circuit are readily implemented as an LSI.
摘要翻译：包括编码器和解码器的编解码器构成数字电话交换系统等的用户电路，其中模拟平衡电路设置在后置滤波器的输出端和预滤波器的输入端之间，以便在双线/四线转换的情况下有效地消除了返回信号，并且数字平衡电路进一步消除了模拟平衡电路未消除的返回信号。特别是在本发明中，模拟平衡电路被构造为使其特性与频率无关，因此模拟平衡电路和数字平衡电路容易实现为LSI。

25. 发明授权

US5862142A Frequency hopping wireless communication system and communication equipment 失效
标题翻译：跳频无线通信系统和通信设备
公开(公告)号：US5862142A
公开(公告)日：1999-01-19
申请号：US461527
申请日：1995-06-05
申请人： Yoshihiro Takiyasu , Eiichi Amada , Tomoaki Ishifuji , Genichi Ishii , Hidehiko Jusa , Shuichi Adachi
发明人： Yoshihiro Takiyasu , Eiichi Amada , Tomoaki Ishifuji , Genichi Ishii , Hidehiko Jusa , Shuichi Adachi
IPC分类号： H04L12/28 , H04W16/02 , H04W84/12 , H04W92/20 , H04J1/00
CPC分类号： H04B1/7156 , H04B2001/71566 , H04W92/20
摘要： In a wireless communication system having a plurality of base stations connected through a control line and a plurality of mobile terminals, one of base stations (a master base station) informs a carrier frequency hop timing to the other base stations (slave base stations) through the control line. Each slave base station generates a wireless communication frame used inside of each cell and switches the carrier frequency of the wireless communication frame in synchronous to the timing indicated by the master base station. Each movable terminal receives an identifier of a frequency hopping sequence from a control information field of the wireless communication frame, hops to one carrier frequency selected among a frequency hopping sequence corresponding to this identifier, and transmit or receive the data through the field following the control information field of the wireless communication frame.
摘要翻译：在具有通过控制线和多个移动终端连接的多个基站的无线通信系统中，基站（主基站）中的一个基站通过载波频率到其他基站（从基站）的定时到达基站控制线。每个从基站产生在每个小区内部使用的无线通信帧，并与主基站指示的定时同步地切换无线通信帧的载波频率。每个可移动终端从无线通信帧的控制信息字段接收跳频序列的标识符，跳到与该标识符相对应的跳频序列中选择的一个载波频率，并通过控制之后的字段发送或接收数据无线通信帧的信息字段。

26. 发明授权

US5596721A Screen communications system granting screen modifying requests if no other requests received after first period of time and releasing requests after second period of time 失效
标题翻译：屏幕通信系统允许屏幕修改请求，如果在第一个时间段之后没有收到其他请求，并在第二个时间段之后释放请求
公开(公告)号：US5596721A
公开(公告)日：1997-01-21
申请号：US760072
申请日：1991-09-13
申请人： Ichiro Masse , Takanori Miyamoto , Takashi Morita , Toshiro Suzuki , Eiichi Amada
发明人： Ichiro Masse , Takanori Miyamoto , Takashi Morita , Toshiro Suzuki , Eiichi Amada
IPC分类号： G06F13/00 , G06F3/14 , H04M11/00 , H01J13/00
CPC分类号： G06F3/1454
摘要： A screen communication method and system for communicating screen data between a plurality of interconnected terminal units each having a display part and an input part, wherein each time screen modifying data is input from the display part, each of the terminal units transmits a modifying right request to another terminal unit before transmitting the screen modifying data, and obtains a modifying right under such a condition that each terminal unit receives no screen modifying request from another terminal unit within a predetermined period of time after the transmission of the first modifying right request.
摘要翻译：一种屏幕通信方法和系统，用于在具有显示部分和输入部分的多个互连的终端单元之间传送屏幕数据，其中每个时间屏幕修改数据从显示部分输入，每个终端单元发送修改权限请求在发送画面修改数据之前到另一个终端单元，并且在每个终端单元在发送第一修改权请求之后的预定时间段内不从另一个终端单元接收到屏幕修改请求的条件下获得修改权限。

27. 发明授权

US4558185A Subscriber line interface circuit with complex impedance 失效
标题翻译：用户线接口电路具有复阻抗
公开(公告)号：US4558185A
公开(公告)日：1985-12-10
申请号：US445976
申请日：1982-12-01
申请人： Yuichi Morikawa , Kazuo Saito , Eiichi Amada , Hirotoshi Shirasu
发明人： Yuichi Morikawa , Kazuo Saito , Eiichi Amada , Hirotoshi Shirasu
IPC分类号： H04B3/03 , H04B1/58 , H04M1/58 , H04Q3/42
CPC分类号： H04M1/585 , H04B1/586
摘要： For the purpose of realizing a line circuit, especially a two-wire four-wire conversion circuit of a telephone exchange in the form of LSI and providing the conversion circuit with an impedance which is suitable to a side tone characteristic of the telephone set, in a line circuit composed of a hybrid circuit wherein the four-wire input line is connected to the two-wire subscriber line via a buffer amplifier and a terminating impedance and in addition the four-wire output line is connected to the output of a subtractor which subtracts an input signal of the four-wire input line passed through a filter circuit from a signal fed from the two-wire subscriber line, the terminating impedance is formed by a resistor component and in addition a feedback circuit having such a transfer characteristic that the impedance of the line circuit seen from the two-wire subscriber line side will become a specified complex impedance is installed between a line which couples the two-wire subscriber line to the subtractor and an input of the buffer amplifier.
摘要翻译：为了实现线路电路，特别是LSI形式的电话交换机的二线四线转换电路，为转换电路提供适合于电话机侧音特性的阻抗，由混合电路构成的线路电路，其中四线输入线经由缓冲放大器与终端阻抗连接到两线用户线，此外四线输出线连接到减法器的输出，从通过二线用户线的信号中减去通过滤波器电路的四线输入线的输入信号，终端阻抗由电阻器部件形成，此外，具有这样的转移特性的反馈电路，从两线用户线路侧看到的线路电路的阻抗将变为指定的复阻抗，安装在耦合两线用户线路t的线路之间减法器和缓冲放大器的输入。

28. 发明授权

US06256509B1 Broadcast information delivering system 失效
标题翻译：广播信息传递系统
公开(公告)号：US06256509B1
公开(公告)日：2001-07-03
申请号：US09268649
申请日：1999-03-16
申请人： Satoshi Tanaka , Eiichi Amada , Seiki Mizutani
发明人： Satoshi Tanaka , Eiichi Amada , Seiki Mizutani
IPC分类号： H04B7005
CPC分类号： H04W72/005 , H04L1/0066 , H04L1/0071 , H04W88/08
摘要： A broadcast information delivering system which includes a plurality of wireless terminals and a wireless base station having a transmitter for transmitting broadcast control information to a control channel, and a transmitter for transmitting a broadcast frame to a broadcast channel in accordance with a transmission condition defined in the broadcast control information. The broadcast frame includes a plurality of sub-frames containing different contents information to each other and a frame header including guidance information of the contents information. Each of the wireless terminals includes a receiver for receiving the control information from the control channel, and a receiver for receiving the broadcast frame from the broadcast channel based on the broadcast control information and selectively receiving the contents information in a specific one of said sub-frames in accordance with the guidance information of the broadcast frame.
摘要翻译：一种包括多个无线终端的广播信息传送系统和具有用于向控制信道发送广播控制信息的发射机的无线基站，以及根据定义的传输条件向广播信道发送广播帧的发射机广播控制信息。广播帧包括彼此不同的内容信息的多个子帧以及包含内容信息的引导信息的帧头。每个无线终端包括用于从控制信道接收控制信息的接收机和用于基于广播控制信息从广播信道接收广播帧的接收机，并且选择性地接收所述子频道中的特定一个中的内容信息，根据广播帧的指导信息进行帧。

29. 发明授权

US6061389A Frequency-hopping communication system and communication station 失效
标题翻译：跳频通信系统和通信站
公开(公告)号：US6061389A
公开(公告)日：2000-05-09
申请号：US203373
申请日：1994-03-01
申请人： Tomoaki Ishifuji , Eiichi Amada , Yoshihiro Takiyasu , Genichi Ishii , Hidehiko Jusa , Shuichi Adachi
发明人： Tomoaki Ishifuji , Eiichi Amada , Yoshihiro Takiyasu , Genichi Ishii , Hidehiko Jusa , Shuichi Adachi
IPC分类号： H04B1/7143 , H04J13/00 , H04W28/04 , H04W76/02 , H04B1/713
CPC分类号： H04B1/7136 , H04B1/713 , H04B1/7156 , H04B2001/71365 , H04B2001/71566
摘要： A frequency hopping communication system having a plurality of wireless mobile stations and at least one base station. Each wireless mobile station is operated to communicate according to a communication frame format generated by a base station. The system performing slow frequency hopping by keeping a frequency hopping interval within each frame. The hopping pattern of a frequency is designated at a field located at the tail of each communication frame by the base station.
摘要翻译：一种具有多个无线移动站和至少一个基站的跳频通信系统。每个无线移动站被操作以根据由基站产生的通信帧格式进行通信。该系统通过在每个帧内保持跳频间隔来执行慢跳频。在基站的每个通信帧的尾部的场指定频率的跳频模式。

30. 发明授权

US5414739A Transmission system constituted of multistage reproduction nodes 失效
标题翻译：传输系统由多级再现节点组成
公开(公告)号：US5414739A
公开(公告)日：1995-05-09
申请号：US974992
申请日：1992-11-12
申请人： Naoya Kobayashi , Yoshitaka Takasaki , Sadao Mizokawa , Hisayuki Maruyama , Hiroshi Mabuchi , Eiichi Amada
发明人： Naoya Kobayashi , Yoshitaka Takasaki , Sadao Mizokawa , Hisayuki Maruyama , Hiroshi Mabuchi , Eiichi Amada
IPC分类号： H04L7/00 , H04L7/027 , H04L7/033 , H04L25/36 , H04L25/40
CPC分类号： H04L7/00 , H04L7/027 , H04L7/033
摘要： A transmission system which includes a plurality of reproduction nodes connected to each other in a cascade connection via a communication line. Each node includes a timing extraction circuit for extracting a timing signal from a signal received via the communication line, a discriminating circuit for converting the received signal into a digital signal according to the timing signal, and a processing circuit for processing, based on the timing signal, the digital signal outputted from the discriminating circuit and outputting the processed digital signal to the communication line. The timing extraction circuit includes a signal delay unit for supplying the timing signal with a signal delay time greater than a delay time occurring in the processing circuit.
摘要翻译：一种传输系统，包括经由通信线路以级联方式彼此连接的多个再现节点。每个节点包括定时提取电路，用于从经由通信线路接收的信号中提取定时信号;判别电路，用于根据定时信号将接收信号转换成数字信号;以及处理电路，信号，从识别电路输出的数字信号并将经处理的数字信号输出到通信线路。定时提取电路包括用于向定时信号提供大于在处理电路中出现的延迟时间的信号延迟时间的信号延迟单元。

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