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1. 发明公开

EP0270112A3 Radio transmitter-receiver system for increasing or decreasing communication channels 失效
标题翻译：用于增加或减少通信信道的无线电发射机 - 接收机系统
公开(公告)号：EP0270112A3
公开(公告)日：1989-07-05
申请号：EP87117896.8
申请日：1987-12-03
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu
IPC分类号： H04B1/74 , H04B7/24
CPC分类号： H04B1/74
摘要： The radio transmitter-receiver system for increasing or decreasing communication channels comprises radio transmitter-receivers (11, 11A, 12, 12A, 13, 13A) each including a separated intermediate frequency portion for modulation and demodulation and a separated microwave portion and having a multiplexer (78) and a divider (90) therebetween. Local oscillators (75) in the intermediate frequency portion have a variable frequency function and the operating frequency of the intermediate frequency portion can be easily changed. The intermediate frequency portions are connected to the microwave portions through the multiplexer (78) or the divider (90) and the frequency of the microwave to be communicated is easily changed. Thus, an increase or decrease of the communication channels is possible at a low cost.

2. 发明公开

EP0145983A2 Digital radio relay equipment and method 失效
标题翻译： Einrichtung und Verfahrenfürdigitale Funkrelaisstation。
公开(公告)号：EP0145983A2
公开(公告)日：1985-06-26
申请号：EP84113918.1
申请日：1984-11-16
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu
IPC分类号： H04B17/00 , H04B1/74 , H04J3/12
CPC分类号： H04J3/12 , H04B1/74 , H04B17/0087
摘要： Radio relay equipment for fully digitalized transmission network is disclosed. In the equipment, a received auxiliary signal can be by-passed from receiver (RX) to transmitter (TX) via a by-passing means (7, 8) provided in an auxiliary unit (4) when no additional auxiliary signal is input to the equipment. When an auxiliary signal (B), for example, order wire signal from the telephone equipment, is input, a switching circuit (8) operatively disconnects the by-passing means (7, 8) and switches the line to the additional auxiliary signal. The by-passing means (7, 8) also operates according to a signal regarding failure of the built-in circuit or power supply of the equipment.
摘要翻译：公开了全数字化传输网络的无线中继设备。在设备中，当辅助单元（4）中没有附加的辅助信号被输入时，所接收到的辅助信号可以经由设置在辅助单元（4）中的旁路装置（7,8）从接收机（RX）到发射机（TX）设备。当辅助信号（B）例如来自电话设备的订单线信号被输入时，切换电路（8）可操作地断开旁路装置（7,8），并将线切换到附加的辅助信号。旁路装置（7,8）还根据关于内置电路的故障或设备的电源的信号进行操作。

3. 发明公开

EP0144083A2 Radio communication system 失效
标题翻译： Radioübertragungssystem。
公开(公告)号：EP0144083A2
公开(公告)日：1985-06-12
申请号：EP84114524.6
申请日：1984-11-30
申请人： FUJITSU LIMITED
发明人： Fukuda, Eisuke Nakayama Bldg. 202 , Takeda, Yukio , Daido, Yoshimasa , Nakamura, Hiroshi , Sasaki, Susumu , Takenaka, Sadao
IPC分类号： H04L27/02
CPC分类号： H04L27/3827 , H04L27/34 , H04L27/345 , H04L27/362
摘要： A radio communication system using a QAM system. In the transmission system, the data of each channel to be transmitted is divided (encoder 102) into data groups having frame slots. When the polarity of the mean value of the data summed in a present data group is the same as the polarity of the mean value of the deviation of all preceding data groups, all data in the present data group is inverted, and a direct current component and a lower frequency component near the direct current component are suppressed. Carrier waves are injected after encoding. In the receiving system, a decoder decodes so as to obtain the original data before the encoding of the transmission system.

4. 发明授权

EP0270112B1 Radio transmitter-receiver system for increasing or decreasing communication channels 失效
标题翻译：用于增加或减少通信信道的无线电发射机 - 接收机系统
公开(公告)号：EP0270112B1
公开(公告)日：1993-03-10
申请号：EP87117896.8
申请日：1987-12-03
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu
IPC分类号： H04B1/74 , H04B7/24
CPC分类号： H04B1/74

5. 发明公开

EP0397077A2 A system for interrupting a transmitter output wave 失效
标题翻译：系统zur Unterbrechung der Ausgangswellen eines发件人。
公开(公告)号：EP0397077A2
公开(公告)日：1990-11-14
申请号：EP90108552.2
申请日：1990-05-07
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu
IPC分类号： H04L27/20
CPC分类号： H04L27/2071 , H04L27/0008
摘要： In a transmitter, a modulator (1) switchably operates on one of two modes of operations, that is, in a first mode of the operation, such as an offset QPSK, FSK or π/4shift QPSK, an amplitude of an output signal of the modulator does not become zero at any instant, and in a second mode of the operation, such as two-phase FSK or four-phase PSK, the output signal of the modulator is 100% amplitude-modulated or 180 phase-modulated.
The operation mode is switched by changing the mode of the parallel input signals to the modulator, where the parallel signals have been converted from a serial input data signal to be transmitted. After the first mode operation is switched to the second mode operation the output signal is interrupted preferably on a first moment that the amplitude of the output signal becomes zero, as well as, before the second mode operation is switched to the first mode operation the output signal is resumed preferably on a second moment that the amplitude of the output signal is to become zero. The interruption of the modulated output signal may be done by cutting theiocal frequency or modulated signal, or by the parallel input signals. Thus, spurious wave is not generated on the transition of interrupting or resuming the modulated transmittal wave, and the period of the interrupting can be short enough.
摘要翻译：在发射机中，调制器（1）可切换地操作两种操作模式之一，即在第一种操作模式中，例如偏移QPSK，FSK或者pi / 4变换QPSK，输出信号的幅度调制器在任何时刻都不会变为零，在第二种操作模式下，例如两相FSK或四相PSK，调制器的输出信号被100％调幅或180相位调制。通过将并行输入信号的模式改变为调制器来切换操作模式，其中并行信号已经从要发送的串行输入数据信号转换。在第一模式操作切换到第二模式操作之后，输出信号优选地在输出信号的幅度变为零的第一时刻被中断，以及在第二模式操作切换到第一模式操作之前的输出最好在输出信号的幅度变为零的第二时刻恢复信号。调制输出信号的中断可以通过切断主频率或调制信号或并行输入信号来完成。因此，在中断或恢复调制的发射波的转变上不产生杂散波，并且中断的周期可以足够短。

6. 发明公开

EP0326104A3 Channel changing system 失效
标题翻译：频道更改系统
公开(公告)号：EP0326104A3
公开(公告)日：1990-10-17
申请号：EP89101271.8
申请日：1989-01-25
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu
IPC分类号： H04Q7/04 , H04B7/26
CPC分类号： H04W36/0055 , H04W84/16
摘要： The present invention is a channel changing system in a mobile unit communication system comprising a plurality of radio base stations (3) making communication with moveable stations (7) through radio channels and a center station for accommodating such base stations (3) and connecting these base stations (3) with the public telephone network (6). The center station is configurated comprising a private branch exchanger (1) for accommodating the public telephone network (6) and the lines (4) extending from a plurality of base stations (3) and a controller (2) for controlling changing of communication channels by supervising the signal receiving condition between a moveable station (7) and a plurality of base stations (3). The controller (2) is configurated so that it issues a channel changing command by detecting, based on the signal receiving condition, that a moveable station (7) has transferred to the radio zone of an adjacent base station (3) from the radio zone of a certain base station (3), while the private branch exchanger (1) conducts line changing depending on such command through the extension transfer to the line (4) of adjacent base station (3) from the line (4) to the relevant base station (3).

7. 发明公开

EP0072241A3 Carrier-wave regeneration circuit 失效
标题翻译：载波波再生电路
公开(公告)号：EP0072241A3
公开(公告)日：1984-08-29
申请号：EP82304203
申请日：1982-08-10
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu , Homan, Hiroyuki
IPC分类号： H04L27/22
CPC分类号： H04L27/2273
摘要： A carrier-wave regeneration circuit for use in a demodulator for a 2"-phase PSK modulated signal comprises a phase-locked loop including a voltage-controlled oscillator 7 and an automatic frequency control (AFC) loop for avoiding the pseudo-lock-in phenomenon. The AFC loop is comprised of two differentiating circuits (21, 25) two mixer circuits (22, 26), and a difference circuit (27) and forms a symmetrical structure so as to exclude undesired noise thereby carrying out a stable AFC operation.

8. 发明授权

EP0112107B1 Data transmitting-receiving system 失效
标题翻译：数据传输 - 接收系统
公开(公告)号：EP0112107B1
公开(公告)日：1989-04-12
申请号：EP83307363.8
申请日：1983-12-02
申请人： FUJITSU LIMITED
发明人： Nakamura, Hiroshi , Sasaki, Susumu , Fukuda, Eisuke
IPC分类号： H04L27/02
CPC分类号： H04L27/3836 , H04L27/368

9. 发明公开

EP0144083A3 Radio communication system 失效
标题翻译：无线电通信系统
公开(公告)号：EP0144083A3
公开(公告)日：1987-09-16
申请号：EP84114524
申请日：1984-11-30
申请人： FUJITSU LIMITED
发明人： Fukuda, Eisuke Nakayama Bldg. 202 , Takeda, Yukio , Daido, Yoshimasa , Nakamura, Hiroshi , Sasaki, Susumu , Takenaka, Sadao
IPC分类号： H04L27/02
CPC分类号： H04L27/3827 , H04L27/34 , H04L27/345 , H04L27/362
摘要： A radio communication system using a QAM system. In the transmission system, the data of each channel to be transmitted is divided (encoder 102) into data groups having frame slots. When the polarity of the mean value of the data summed in a present data group is the same as the polarity of the mean value of the deviation of all preceding data groups, all data in the present data group is inverted, and a direct current component and a lower frequency component near the direct current component are suppressed. Carrier waves are injected after encoding. In the receiving system, a decoder decodes so as to obtain the original data before the encoding of the transmission system.
摘要翻译：一种使用QAM系统的无线电通信系统。在传输系统中，将要发送的每个信道的数据被分成（编码器102）为具有帧时隙的数据组。当在当前数据组中求和的数据的平均值的极性与所有在前数据组的偏差的平均值的极性相同时，当前数据组中的所有数据被反转，并且直流分量并且抑制直流分量附近的低频分量。编码后注入载波。在接收系统中，解码器解码以便在传输系统的编码之前获得原始数据。

10. 发明授权

EP0072241B1 Carrier recovery circuit 失效
标题翻译：载波恢复电路
公开(公告)号：EP0072241B1
公开(公告)日：1986-08-13
申请号：EP82304203.1
申请日：1982-08-10
申请人： FUJITSU LIMITED
发明人： Sasaki, Susumu , Homan, Hiroyuki
IPC分类号： H04L27/22
CPC分类号： H04L27/2273

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