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11. 发明专利

JPS5927632A Digital communication system 失效
标题翻译：数字通信系统
公开(公告)号：JPS5927632A
公开(公告)日：1984-02-14
申请号：JP13771582
申请日：1982-08-06
申请人： Mitsubishi Electric Corp
发明人： MURAKAMI MASAHIKO
IPC分类号： G10L11/00 , G10L13/00 , G10L19/00 , G10L25/00 , H04B1/66 , H04B1/7143 , H04B14/04 , H04J13/00
CPC分类号： H04B1/66
摘要： PURPOSE:To attain the frame synchronism of a transmitted characteristic parameter value without any frame synchronizing circuit, by transmitting a hopping period and a transmission period of the characteristic parameter while keeping the relation of an integer multiple. CONSTITUTION:Frames F1, F2, F3 accommodate characteristic parameters a1, b1, c1, n1, a2, b2, c2, n2, a3, b3, c3, n3 in a frame train of the characteristic parame ters. The code train of a code M controlling the frequency hopping synchronizing with each frame of the characteristic parameters is transmitted by using the frequency hopping system for the secondary modulating system. The transmission is performed in this case so that the hopping period and the transmission period of the characteristic parameters are made coincident.
摘要翻译：目的：通过传输特征参数的跳变周期和传输周期，同时保持整数倍的关系，获得没有任何帧同步电路的传输特性参数值的帧同步。构成：帧F1，F2，F3适应特征参数的帧序列中的特征参数a1，b1，c1，n1，a2，b2，c2，n2，a3，b3，c3，n3。通过使用用于二次调制系统的跳频系统来发送控制与特征参数的每个帧同步的跳频的码M的码串。在这种情况下执行传输，使得特征参数的跳变周期和传输周期一致。

12. 发明专利

JPH031729A BROAD-BAND COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH031729A
公开(公告)日：1991-01-08
申请号：JP13633689
申请日：1989-05-30
申请人： JAPAN TECH RES & DEV INST , MITSUBISHI ELECTRIC CORP
发明人： MUTO YOSHITAKA , SAWASA HIROYUKI , MURAKAMI MASAHIKO
IPC分类号： H04J13/00 , H04B1/713 , H04B7/005
摘要： PURPOSE:To obtain a broad-band frequency communication equipment with less characteristic degradation without complicating the equipment by flattening the frequency characteristic of the entire equipment including a radio wave propagation path. CONSTITUTION:A transmission output of a transmitter 1 radiates from a transmission antenna 2 and a broad band frequency hopping signal reaching a reception antenna 4 through the propagation path 3 is inputted to a receiver 5. The frequency characteristic of the transmission reception antennas 2, 4 and the frequency characteristic of the reception 5 are selected to have less passing loss at a high frequency and to have a relative gain, then the frequency characteristic of the transmitter 1 is adjusted to make the entire frequency characteristic flat. Thus, since the frequency characteristic of the transmission/reception antennas, the transmitter and the reception is made flat while including that of the propagation path, the broad-band communication equipment with less characteristic degradation is obtained without complicating the equipment.

13. 发明专利

JPH0151102B2 失效
公开(公告)号：JPH0151102B2
公开(公告)日：1989-11-01
申请号：JP22225182
申请日：1982-12-15
申请人： MITSUBISHI ELECTRIC CORP
发明人： MURAKAMI MASAHIKO
IPC分类号： H04L7/00 , H04B1/7136 , H04B1/7156 , H04J13/00 , H04L7/04

14. 发明专利

JPS63138824A RECEIVER 失效
公开(公告)号：JPS63138824A
公开(公告)日：1988-06-10
申请号：JP28484286
申请日：1986-11-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： MURAKAMI MASAHIKO
IPC分类号： H04K3/00 , H04B1/715 , H04J13/00
摘要： PURPOSE:To simplify the titled receiver and to make the size small by providing a filter bank to a high frequency amplifier stage so as to utilize it for the detection of an interference wave in a frequency hopping system receiver. CONSTITUTION:A signal from an antenna 10 is inputted to a filter bank 13 comprising high frequency band pass filters 1a - 1n and high frequency amplifiers 2a - 2n. A level detector 3 detects each output level of the amplifiers 2a - 2n and stores it. A switch 4 supplies a desired high frequency signal to a mixer 5 by using a switching signal of a hopping pattern generator 9. Since the output frequency of a local oscillator 8 is switched by the pattern generator 9, the reception signal is amplified by an intermediate wave amplifier 6 and demodulated by a demodulator 7. A signal other than the desired channel given by the pattern generator 9 is fed via the switch 4 to the discriminator 11, where the presence of an interference wave is discriminated.

15. 发明专利

JPS6266739A SYNCHRONIZING DEVICE OF FREQUENCY HOPPING TYPE 失效
公开(公告)号：JPS6266739A
公开(公告)日：1987-03-26
申请号：JP20801885
申请日：1985-09-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： TACHIKA TOSHIO , MURAKAMI MASAHIKO
IPC分类号： H04B1/69 , H04B1/715 , H04J13/00
摘要： PURPOSE:To reduce the influence of an undesired signal of high level by providing an intermediate frequency stage with a limiter amplifier which limits the amplitude of the undesired signal and a noise squelching circuit which discriminates the desired and undesired signal waves. CONSTITUTION:The signal received by an antenna 1 is mixed with the output signal of a synthesizer 10 by a mixer 3 and is converted to an intermediate frequency (IF) signal and frequency bands other than a desired reception frequency band are eliminated by an IF filter 4. The signal which passes the filter 4 is amplified by an IF amplifier 5 and is detected by a linear detector 11 and has the high frequency component taken out by a high pass filter 12 and is amplified by a low frequency amplifier 13 and is detected by an envelope detector 6. At this time, it is detected whether a desired signal wave exists or not by the output level of the filter 12, and a synchronization detector 8 gives a synchronization acquiring signal to a hopping controller 9 to control the synthesizer 10.

16. 发明专利

JPS6224738A RECEIVER 失效
公开(公告)号：JPS6224738A
公开(公告)日：1987-02-02
申请号：JP16555685
申请日：1985-07-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： MURAKAMI MASAHIKO
IPC分类号： H04K1/00 , H04B1/69 , H04B1/713 , H04J13/00 , H04L27/12 , H04L27/14 , H04L27/148
摘要： PURPOSE:To halve required number of band-pass filters by constituting an energy detector after the band-pass filter in a spectrum analyzer and detector with a frequency discriminator so as to utilize not only energy level information but also frequency information thereby applying detection of 2 frequencies. CONSTITUTION:A signal received by a reception antenna 32 or a down-converter (option) is given to 2 sets of band-pass filters 50. Each filter is turned to separate 2 tones into 2 tones by two each. A signal through each band-pass filter 50 is given to each frequency discriminator 51. The frequency discriminator 51 outputs a voltage in response to the frequency of the output signal of the band-pass filter 50 to separate 2 tones as a whole. An output signal from each frequency discriminator 51 is given to each threshold or energy level detector 54.

17. 发明专利

JPS59110241A Digital communication device 失效
标题翻译：数字通信设备
公开(公告)号：JPS59110241A
公开(公告)日：1984-06-26
申请号：JP22225182
申请日：1982-12-15
申请人： Mitsubishi Electric Corp
发明人： MURAKAMI MASAHIKO
IPC分类号： H04L7/00 , H04B1/7136 , H04B1/7156 , H04J13/00 , H04L7/04
CPC分类号： H04L7/043
摘要： PURPOSE:To omit a frequency dividing circuit for generating a data clock by generating the data clock in correspondence with the period of a low-speed pseudo-random code. CONSTITUTION:A transmitter and a receiver are each equipped with a generator 5a for the low-speed pseudo-random code for synchronism acquisition, generator 5b for a high-speed pseudo-random code whose start position is controlled periodically by the low-speed pseudo-random code, and a pseudo-random code generator 5 having a switching circuit 5d which switches and outputs outputs of the generators 5a and 5b according to a control signal. Then, the communication controlled by the low-speed pseudo-random code held in a synchronous state previously is carried out during the transmission of a signal for synchronism acquisition and in a reception waiting state, and the communication controlled by the high-speed pseudo-random code is carried out after synchronism is established. Then a period extracting circuit 5c which extracts the period of the output of the generator 5a is provided and the output of the circuit 5c is used as the data clock for data transmission.
摘要翻译：目的：省略分频电路，用于通过产生与低速伪随机码周期对应的数据时钟来产生数据时钟。构成：发射机和接收机各配备有用于同步获取的低速伪随机码的发生器5a，用于高速伪随机码的发生器5b，其高速伪随机码的起始位置由低速伪随机码周期性地控制以及伪随机码发生器5，其具有根据控制信号切换并输出发生器5a和5b的输出的切换电路5d。然后，在用于同步捕获的信号的发送和接收等待状态下，先前保持在同步状态的低速伪随机码所控制的通信被执行，并且由高速伪随机码控制的通信，随机码在同步建立后进行。然后提供提取发生器5a的输出周期的周期提取电路5c，并且使用电路5c的输出作为用于数据传输的数据时钟。

18. 发明专利

JPH04280136A DIGITAL TRANSMITTER-RECEIVER 失效
公开(公告)号：JPH04280136A
公开(公告)日：1992-10-06
申请号：JP6525891
申请日：1991-03-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： MURAKAMI MASAHIKO
IPC分类号： H04J13/00 , H04B1/713 , H04L7/00 , H04L12/28 , H04W24/00 , H04W56/00 , H04W72/04 , H04W74/04 , H04W74/06 , H04W84/12
摘要： PURPOSE:To realize the digital transmitter-receiver with a short polling interval in the polling system transmitter-receiver employing the frequency hopping system. CONSTITUTION:A signal from a main station is mixed with a local signal at a reception circuit 20 via an antenna 18 and a high frequency changeover device 19 and a demodulation circuit 20 demodulates a data. A hopping pattern signal from the main station is subject to synchronization acquisition by a synchronization acquisition circuit 24, and a synchronization hold circuit 25 applies synchronization holding to the signal based thereon to control a hopping pattern generating circuit 23 to control a local signal generating circuit 22. A synchronization holding discrimination circuit 26 checks the synchronization holding state after a prescribed time to control a hopping pattern generating circuit 23 so as to omit the succeeding synchronization holding when the synchronization holding is consecutive. When the synchronization holding state is valid up to a succeeding synchronization holding time, the succeeding synchronization acquisition is omitted and polling is implemented immediately, then the polling interval is reduced.

19. 发明专利

JPH0441855B2 失效
公开(公告)号：JPH0441855B2
公开(公告)日：1992-07-09
申请号：JP20801885
申请日：1985-09-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： TACHIKA TOSHIO , MURAKAMI MASAHIKO
IPC分类号： H04B1/69 , H04B1/715 , H04J13/00

20. 发明专利

JPS6320064B2 失效
公开(公告)号：JPS6320064B2
公开(公告)日：1988-04-26
申请号：JP13771582
申请日：1982-08-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： MURAKAMI MASAHIKO
IPC分类号： G10L11/00 , G10L13/00 , G10L19/00 , G10L25/00 , H04B1/66 , H04B1/7143 , H04B14/04 , H04J13/00

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