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1. 发明专利

JPS6226932A INTERFERENCE WAVE ELIMINATION SYSTEM 失效
公开(公告)号：JPS6226932A
公开(公告)日：1987-02-04
申请号：JP16643585
申请日：1985-07-26
申请人： FUJITSU LTD
发明人： OGINO MASAO
IPC分类号： H04B1/10 , H04B7/08
摘要： PURPOSE:To eliminate automatically an interference wave by using a PLL circuit to deviate a variable intermediate frequency by a frequency being a difference between a signal wave and the interference wave at the detection of the interference wave thereby absorbing the interference wave by a notch filter. CONSTITUTION:The frequency of the interference wave Fb and that of a signal wave Fa are equal, an oscillating frequency f3 is selected so that the intermediate frequencies f1 and f4 are identical. As a result, the intermediate frequency f1 is changed by a frequency (Fa-Fb) being the difference between the frequencies of the signal wave Fa and the interference wave Fb with respect to a value at the input of the signal wave Fa only. When the frequency of the interference wave Fb is higher than that of the signal wave Fa, the oscillation frequency f2 of a variable local oscillator 14 is moved toward a lower frequency. Thus, the interference wave Fb is absorbed automatically by setting the cut-off frequency f0 of the notch filter 8 as the frequency (f0=f1 at no interference wave input) corresponding to the center of and of the signal wave Fa in a variable intermediate frequency circuit 10.

2. 发明专利

JPS58171135A TRANSMISSION FREQUENCY CONTROLLER 失效
公开(公告)号：JPS58171135A
公开(公告)日：1983-10-07
申请号：JP5331582
申请日：1982-03-31
申请人： FUJITSU LTD
发明人： OGINO MASAO , KAWAGUCHI TOSHIO
IPC分类号： H03D7/00 , H04B7/15 , H04B7/155
摘要： PURPOSE:To make a high-stability oscillator for generation of a local oscillation signal unnecessary, by controlling a transmission frequency on a basis of a receiving frequency in a television relay broadcasting device or the like. CONSTITUTION:A phase comparing means 16, which compares the phase of the signal of an intermediate frequency with that of a reference signal to output a signal corresponding to the phase difference, and a means 43 which compares the output of a transmission local oscillator 6 with the phase difference of the reference signal to generate an error signal are provided. The oscillation frequency of a reception local oscillator is held in a certain frequency relation to the reference signal by the output of the phase comparing means 16, and the oscillation frequency of the transmission local oscillator is held in a certain frequency relation to the reference signal by the output of the means 43.

3. 发明专利

JPH02196974A POSITION INFORMATION PROCESSING SYSTEM 失效
公开(公告)号：JPH02196974A
公开(公告)日：1990-08-03
申请号：JP1509889
申请日：1989-01-26
申请人： FUJITSU LTD
发明人： OGINO MASAO , KIDENA MINORU , SATO KAZUO
IPC分类号： G01S5/06 , G01S5/10
摘要： PURPOSE:To identify the a position of a mobile station with desired accuracy by a comparatively simple constitution by deriving a propagation delay between the arbitrary number of mobile stations, a master station and plural slave stations in a position identification processing part of the master station. CONSTITUTION:This system is provided with the arbitrary number of mobile stations 1, a master station 2 and plural slave stations 3. The master station 2 and plural slave stations 3 are provided with a frequency dividing part 4 for receiving a signal from the mobile station 1 and bringing it to frequency division in plural different frequency division ratios, and a phase difference detecting part 5 for detecting the phase difference of a frequency dividing signal from the frequency dividing part 4 and a reference signal. Also, the master station 2 is provided with a position identification processing part 6. In this state, phase difference information from the phase difference detecting parts 5 of this master station 2 and plural slave stations 3 is transferred to the position identification processing part 6. In this state, in the position identification processing part 6, transfer delays between the mobile station 1, and the master station 2 and plural slave stations 3 are derived, respectively, based on the phase difference information and the position of the mobile station 1 is identified.

4. 发明专利

JPH01256201A TRANSMITTER-RECEIVER HAVING CIRCULAR ARRAY ANTENNA 失效
公开(公告)号：JPH01256201A
公开(公告)日：1989-10-12
申请号：JP8444388
申请日：1988-04-05
申请人： FUJITSU LTD
发明人： OGINO MASAO
IPC分类号： H01Q3/32 , H01Q21/20
摘要： PURPOSE:To automatically attain the adjustment of direction by applying fix storage control to a switch stored in a memory at transmission and transmitting a signal through the opposite path to that at reception via a combiner/ distributer. CONSTITUTION:The transmitter-receiver consists of a controller 6 provided with a memory 62 applying selection control to switches S1-Sn so as to maximize a reception output of a reversible combiner/distributer 5 combining reception signals of phase shifters 21-2n and storing the position of a switch selected at its maximum value. Then the position of the switch stored in the memory 62 is subjected to fixed storage control at transmission and the signal is sent in the opposite path to that at the reception via the combiner/distributer 5. Thus, the direction is adjusted automatically at the reception.

5. 发明专利

JPS6248181A EQUIPMENT FOR DETECTING RECEIPT INTERFERING WAVE FOR TELEVISION SIGNAL 失效
公开(公告)号：JPS6248181A
公开(公告)日：1987-03-02
申请号：JP18906485
申请日：1985-08-27
申请人： FUJITSU LTD , JAPAN BROADCASTING CORP
发明人： KIDENA MINORU , SUZUKI SHINJIRO , OGINO MASAO , ICHIKAWA KAZUYOSHI , KOMAI HARUO
IPC分类号： H04N5/21
摘要： PURPOSE:To detect a frequency and a level of an interfering wave by mixing an intermediate frequency signal of a television signal with a variable frequency signal, detecting through a band-pass filter, comparing a detected output with a prescribed comparison level and extracting a signal above the prescribed level. CONSTITUTION:An intermediate frequency signal of a television signal inputted to an input terminal JI is mixed with an output signal of a phase synchronous oscillator 18 in a frequency converter 1 and converted into the second intermediate frequency signal. An output frequency of the phase synchronous oscillator 18 is successively changed and the second intermediate frequency is changed, and then, an output signal of a band-pass filter 7 scans in a band of the intermediate frequency signal and an output signal of a detector 8 appears as a spectrum of a video signal. Then, in a low-pass filter 9, only a synchronous signal component and a carrier wave component are obtained, only when the synchronous signal component passes through the band-pass filter 7 through a logarithmic amplifier 10, an analog switch 11 is turned off and only an interfering wave component is obtained. It is recorded in a memory 13 through an A/D converter 12, a frequency of a memory 14 is made correspond to a maximum value and a signal is transmitted to an output terminal of a frequency and a level.

6. 发明专利

JPS627225A ANTENNA SYSTEM ELIMINATING DISTURBIND WAVE 失效
公开(公告)号：JPS627225A
公开(公告)日：1987-01-14
申请号：JP14713585
申请日：1985-07-03
申请人： FUJITSU LTD
发明人： OGINO MASAO
IPC分类号： H04B1/10
摘要： PURPOSE:To decrease automatically a disturbing wave within a range where an input level of a signal wave is not lowered so much by applying feedback control to a variable phase shifter based on an output of a signal wave level setting device and a disturbing wave level setting device. CONSTITUTION:The signal wave level setting devices 5a, 5b of the 1st and 2nd reception systems output logical 0 when the reception signal level is a prescribed value or below respectively and output logical 1 when over a prescribed value. When the disturbing wave level received is a prescribed setting level, the disturbing wave level setting device 9 zeros the output and when over the setting level, a differential analog voltage of a differential amplifier 94 is outputted. A control section 10 feeds back an output signal passing through gates 10a, 10b based on the output of the setting devices 5a, 5b and 9 to variable phase shifters 3a, 3b respectively to control the phase shifters thereby cancelling the phases of the disturbing waves incoming to reception antennas 1a, 1b, and minimizes the disturbing wave level of the output of a hybrid 7.

7. 发明专利

JPS58171136A TRANSMISSION FREQUENCY CONTROLLER 失效
公开(公告)号：JPS58171136A
公开(公告)日：1983-10-07
申请号：JP5331682
申请日：1982-03-31
申请人： FUJITSU LTD
发明人： OGINO MASAO , KAWAGUCHI TOSHIO , KIDENA MINORU
IPC分类号： H03D7/00 , H04B7/15 , H04B7/155
摘要： PURPOSE:To facilitate the production and the adjustment to improve the production efficiency, by using an intermediate frequency signal to stabilize the reception-side local oscillation frequency and eliminating the frequency dependence of a transmission frequency controller in a television relay broadcasting device or the like. CONSTITUTION:In a television relaying device 1A, a receiving signal fR is mixed with the local oscillation signal of a local oscillator 3A consisting of a voltage control oscillator in a mixer 2 to obtain an intermediate frequency signal f1. This signal f1 is inputted to a mixer 5 through an amplifier 4 and is mixed with the local oscillation signal of a local oscillator 6 to obtain a transmission signal fT. The signal fT is selected so as to have a channel different from that of the signal fR. A frequency controller 10A consists of a BPF31, the first- the sixth frequency dividers 32, 35, 36, 38, 40, and 45, the first- the third phase detectors 33, 39, and 44, the first and the second mixers 37 and 42, the first and the second changeover switches 41 and 43, an n-multiplier 36A, and a reference quartz oscillator and not only controls the reception local oscillator 3A but also regulates the oscillation frequency of the transmission local oscillator 6 to hold the transmission signal fT in a correct frequency.

8. 发明专利

JPS5530253A DIRECT SSB MODULATION CIRCUIT 失效
公开(公告)号：JPS5530253A
公开(公告)日：1980-03-04
申请号：JP10359178
申请日：1978-08-25
申请人： FUJITSU LTD
发明人： OGINO MASAO
IPC分类号： H03C1/60
摘要： PURPOSE:To obtain a signal accurately phase-shifted by 90 deg. over the whole frequency band by modulating a sound, i.e. a multi-frequency input signal and then by phase-shifting its carrier frequency by 90 deg.. CONSTITUTION:The 1st and 2nd local oscillators 1 and 10 are provided; 1st phase- shifter 2 shifts the phase of the output of 1st oscillator 1 by 90 deg. and 2nd phase shifter 9 phase-shifts the output of 2nd oscillator 10 by 90 deg.. A multi-frequency input signal and the output of oscillator 10 are inputted to 1st modulator 8 and the multi- frequency input signal and the output of 2nd phase shifter 9 are inputted to 2nd modulator 7. Then, 1st balanced modulator 5 is supplied with the outputs of oscillator 1 and modulator 8, and 2nd balanced modulator 4 with the outputs of phase shifter 2 and modulator 7. Then, amplifier 6 is provided which obtains the sum and difference between the outputs of those modulators 4 and 5. Consequently, the multi-frequency input signal can precisely be phase-shifted by 90 deg. and putting direct SSB modulation to practical use can be progressed by at least one step.

9. 发明专利

JP2570814B2 失效
公开(公告)号：JP2570814B2
公开(公告)日：1997-01-16
申请号：JP13699388
申请日：1988-06-02
申请人： FUJITSU LTD
发明人： OGINO MASAO
IPC分类号： H04B7/15 , H04B7/26 , H04L12/28

10. 发明专利

JPH04292097A DATA COMMUNICATION CONTROL SYSTEM BY RADIO EQUIPMENT 失效
公开(公告)号：JPH04292097A
公开(公告)日：1992-10-16
申请号：JP8045291
申请日：1991-03-20
申请人： FUJITSU LTD
发明人： OGINO MASAO , KONNO AKIHIKO
IPC分类号： H04B1/40 , H04Q9/00
摘要： PURPOSE:To increase the number of terminal stations capable of increasing and managing the number of terminal station data to be received in a central station while shortening time for the time slot frame of a terminal data and increasing the data collection ability of the central station. CONSTITUTION:By turning on a power source control switch 6, a crystal oscillator 8 is started, self data D1 to be outputted from a MPU 5 is converted into a data signal and outputted to a modulator 9. Here, the modulator 9 is not turned on in the starting time, data DS1 corresponding to the starting time of the crystal oscillator 8 is not outputted. Thus, the modulation data signal DS can be transmitted with the time slot frame of the time width shorter than the existing time slot frame from the radio equipment of the radio station for each terminal station, the number of terminal stations which can be managed in the central station can be increased.

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