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1. 发明专利

JPS59161145A Stuff controlling system 失效
标题翻译： STUFF控制系统
公开(公告)号：JPS59161145A
公开(公告)日：1984-09-11
申请号：JP3553483
申请日：1983-03-04
申请人： Nec Corp , Nippon Telegr & Teleph Corp
发明人： TANIGUCHI TAICHI , HOTSUTA TOSHITSUNE , HAYASHIZAKI HIROKI , MOROTOMI HITOSHI
IPC分类号： H04B7/15 , H04B7/212 , H04J3/07
CPC分类号： H04J3/07
摘要： PURPOSE:To improve a utilizing efficiency of a satellite communication without deteriorating a stuff detecting error rate by using the time slot for a stuff disignation code to a trasmission of an information code, in a satellite communication system for executing a time division multiplex communication. CONSTITUTION:When a stuff existence signal is inputted from a stuff request generating circuit 2, a stuff existence pattern A and a dummy code are inserted into a stuff designating code use time slot S and a variable code use time slot V, respectively. Between the following (n) frames, an information code C from an input terminal 104, and an output signal from a transmitting elastic buffer circuit 1 are inserted into the slot S and the slot V, respectively. After passing through said (n) frames, a stuff non-existence pattern B and an output signal from the circuit 1 are inserted into the slot S and the slot V, respectively. Also, the output signal from the circuit 1 is always inserted into a slot I, and a selecting circuit 3 executes such an operation and outputs the output signal from a terminal 105.
摘要翻译：目的：在用于执行时分多路复用通信的卫星通信系统中，为了提高卫星通信的利用效率，而不会通过使用用于消息的信息码的消息码的时隙来降低信息检测错误率。构成：当从填充请求生成电路2输入填充存在信号时，将填充存在模式A和伪代码分别插入到指定代码使用时隙S和可变代码使用时隙V中。在以下（n）帧之间，来自输入端子104的信息码C和来自发送弹性缓冲电路1的输出信号分别插入到槽S和槽V中。在通过所述（n）帧之后，将填充不存在模式B和来自电路1的输出信号分别插入到槽S和槽V中。此外，来自电路1的输出信号总是插入到时隙I中，并且选择电路3执行这样的操作，并从终端105输出输出信号。

2. 发明专利

JPH104378A SATELLITE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH104378A
公开(公告)日：1998-01-06
申请号：JP15358196
申请日：1996-06-14
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/208
摘要： PROBLEM TO BE SOLVED: To make a slave station equipment small and to economize the equipment by adopting a narrow frequency band for a frequency synthesizer of a slave station. SOLUTION: The system is made up of a base station consisting of a transmitter-receiver 1, each communication controller 3 belonging to communication system groups G1 to Gn, and a MODEM 2, and up of each slave station 11 belonging to each of the communication system groups G1 to Gn. An operating frequency band by the MODEM 2 designated by the communication controller 3 belonging to each of the communication system groups G1 to Gn and an operating frequency band of each slave station 11 are selected as one-unit band and the bands are not overlapped in the group.

3. 发明专利

JPH0591006A VOICE TRANSMITTER 失效
公开(公告)号：JPH0591006A
公开(公告)日：1993-04-09
申请号：JP27315291
申请日：1991-09-25
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/212 , H04J3/00 , H04J3/06 , H04L7/08
摘要： PURPOSE:To prevent missing in voice data by sending only a unique word signal in a very short time length at a prescribed frame even when voice data to be sent are not in existence and keeping the synchronization at a receiver side demodulator and demodulating voice data immediately when the voice data are successively received. CONSTITUTION:When voice data are lost, a voice detector 3 sends a start signal to a unique word burst generator 4 with prescribed synchronization at a sender side. The generator 4 sends only a unique word signal in a very short time length for a prescribed frame synchronously with a frame timing pulse from a transmission data generator 1. When the voice data are generated, a voice data transmission start signal is inserted to a head position by the generator 1 and clears the head position of the voice data at a receiver side. Then the receiver side demodulator keeps synchronization and when the voice data are received, the data are immediately demodulated and the missing of the voice data is prevented.

4. 发明专利

JPH0567997A DATA SYNCHRONIZATION SYSTEM FOR MOBILE BODY SATELLITE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH0567997A
公开(公告)日：1993-03-19
申请号：JP22677091
申请日：1991-09-06
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/212 , H04B7/26 , H04L7/08
摘要： PURPOSE:To allow a center station to reproduce correctly an out-bound signal sent from a network control station via an asynchronization line. CONSTITUTION:A control section 10 of a network control station generates an out-bound signal S1 in response to a frame timing signal F1 generated by a frame timing generating circuit 11 and sends it to a MODEM section 20 of the center station via an asynchronization line 30 as a packet signal S2 by a data output circuit 13. A data reception circuit 21 of the MODEM section 20 latches once data by one packet. A frame detection circuit 22 detects a head of a frame from the packet signal S2 to output a frame detection signal D. A timing generating circuit 23 generates a clock signal C and a frame timing signal F2 synchronously with the frame detection signal D. The data reception circuit 21 outputs the latched data in response to the timing signal C to reproduce an out-bound signal S3.

5. 发明专利

JPH0327629A FREQUENCY CONTROL SYSTEM FOR VERY SMALL SATELLITE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH0327629A
公开(公告)日：1991-02-06
申请号：JP16169889
申请日：1989-06-23
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/00 , H04B7/204
摘要： PURPOSE:To economize an equipment and to improve the utilization efficiency of a line by adopting a variable frequency oscillator for a frequency oscillator of a very small satellite(VSAT) earth station and following the control from a central station. CONSTITUTION:A very small satellite earth station(VSAT station) is provided with a demodulator 3, a modulator 4 and a variable frequency oscillator 5, and the demodulator 3 extracts DELTAf information for its own station among reception data resulting from demodulating a reception IF signal. Then the oscillator 5 corrects the oscillated frequency of a carrier variable frequency oscillator by DELTAf and sends the result via the modulator 4. In this case, not the frequency fixed oscillator but the frequency variable oscillator such as a voltage controlled crystal oscillator is used for the carrier variable frequency oscillator. Thus, the variable oscillator is employed for the frequency oscillator of the VSAT station to follow the control from a central station(HUB station) in such a manner, thus an expensive highly stable frequency oscillator is not required to economize the equipment and to improve the line utilization efficiency.

6. 发明专利

JPH1117670A FRAME SYNCHRONIZATION SYSTEM 失效
公开(公告)号：JPH1117670A
公开(公告)日：1999-01-22
申请号：JP16780597
申请日：1997-06-25
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04J3/06 , H04L7/08
摘要： PROBLEM TO BE SOLVED: To reduce the probability of mis-detecting a unique word, independently of the presence of shadowing. SOLUTION: An aperture time width 104 for deciding a unique word detection period is set based on a count of a frame counter 42. The frame counter 42 is driven by a clock 111 outputted from a fixed frequency oscillator 41, provided separately from a recovered clock. Thus, even in the case that a shadowing state is reached and a recovered clock frequency deviates widely from a regular frequency, the frame counter 42 counts accurately time. Since the aperture time width 104 is set narrower, the probability of mis-detection of unique word is reduced.

7. 发明专利

JPH0563621A SUBMINIATURE SATELLITE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH0563621A
公开(公告)日：1993-03-12
申请号：JP24251191
申请日：1991-08-28
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/15
摘要： PURPOSE:To provide a subminiature satellite communication system capable of controlling the transmission level of a VSAT station. CONSTITUTION:An HUB station forms a transmission instruction, a slot number in use and slot utilization information in the order of younger station numbers, for example, based on station number information of all participating VSAT stations for which a transmission level control section 4 is registered and a modulator 2 sends an in-bound signal. The demodulator 5 of the VSAT station detects the transmission instruction and the slot utilization information and a modulator 6 forms and outputs an in-bound signal corresponding to the transmission instruction. Moreover, the modulator 6 references the slot operating information in the transmission of general data to select a slot. Then the demodulator 1 of the HUB station measures a reception level DELTAL of the reception in-bound signal, the transmission level control section 4 forms the DELTAL information with a station number added thereto and the modulator 2 sends the in-bound signal. The demodulator 5 of the VSAT station detects the DELTAL information and the modulator 6 corrects the transmission level by DELTAL.

8. 发明专利

JPH04286222A RECEIVING TIMING INFORMATION TRANSFER SYSTEM FOR MOBILE OBJECT SATELLITE COMMUNICATION 失效
公开(公告)号：JPH04286222A
公开(公告)日：1992-10-12
申请号：JP7377291
申请日：1991-03-14
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/212
摘要： PURPOSE:To obtain a transfer system capable of transferring reception timing information without increasing the number of lines between a modulating part and a communication control part. CONSTITUTION:A district center is provided with a modulator and demodulator 1 to demodulate receive data 12 from a received signal 11, a receiving timing measuring instrument 2 to measure receiving timing from the received signal 11 and output the receiving timing information 13, and a time-division multiplexer 3 to time-division-multiplex the receive data 12 and the receiving timing information 13, and since the receiving timing information detected from the received signal is transferred to the communication control part as a multiplex signal 14 obtained by time-division-multiplexing the same information and the demodulated receive data, necessity to provide separately a line for transferring the receiving timing information is eliminated.

9. 发明专利

JPH03101525A AUTOMATIC LEVEL CONTROL SYSTEM FOR SUBMINIATURE SATELLITE COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH03101525A
公开(公告)日：1991-04-26
申请号：JP23865489
申请日：1989-09-14
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04B7/005 , H03G3/20
摘要： PURPOSE:To control an output level in a short time with high accuracy even in a demand assign system in which a carrier number changes with time by providing a level detector detecting the output level of a frequency synthesizer and a level detector detecting the output level of a large power amplifier amplifying the output signal of a level adjustment device. CONSTITUTION:An indoor device IDU is provided with plural modulators 1-3, a level adjustment device 4, a 1st level detector 5, a control circuit 6, and a frequency synthesizer 7. Moreover, an outdoor device ODU has a large power amplifier HPA 9 and a 2nd level detector 10. When one modulator outputs a signal, a detected value in the 2nd level detector 10 controls the level adjustment device 4 so that the detected value in the 2nd level detector 10 has an expected absolute value to store a difference between the detected value of the 2nd level detector 10 at that time and the detected value of the 1st level detector 5, and the level adjustment device 4 is controlled so that the difference between the detected value of the 2nd level detector 10 detected when plural modulators output a signal and the detected value of the 1st level detector 5 is equal to the former difference.

10. 发明专利

JPS61284142A DETECTION FOR UNIQUE WORD 失效
公开(公告)号：JPS61284142A
公开(公告)日：1986-12-15
申请号：JP12586085
申请日：1985-06-10
申请人： NEC CORP
发明人： TANIGUCHI TAICHI
IPC分类号： H04J3/06 , G06F7/02 , H04L7/08 , H04L7/10
摘要： PURPOSE:To shorten the time required for unique word detection by adding the number of coincident bits and a number determined unequivocally by a prescribed length and the number of pattern detection allowable error bits. CONSTITUTION:Each of pattern coincidence numbers A and B consists of 3 bits, and an addition value consists of 4 bits. Full adders 1-3 add pattern coincidence numbers A and B to generate a 4-bit signal of digits 2 -2 of A+B. That is, the full adder 1 adds values in digit 2 of inputted pattern coincidence numbers A and B to output the value in digit 2 and a carry signal as the result to a full adder 4 and the full adder 2 respectively. The full adder 2 adds values in digit 2 of inputted pattern coincidence numbers A and B and the carry signal from the full adder 1 to output the value in digit 2 and a carry signal as the result to a full adder 5 and the full adder 3 respectively. Thus, adders 6 and 7 and A+B and values in digits 2 and 2 of the addition value X to output the final carry signal to a terminal 111.

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