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1. 发明专利

JP2004015660A Distortion compensator 审中-公开
公开(公告)号：JP2004015660A
公开(公告)日：2004-01-15
申请号：JP2002169096
申请日：2002-06-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： NAGANO JUNICHI
IPC分类号： H03F1/32
摘要： PROBLEM TO BE SOLVED: To obtain a distortion compensator which performs distortion compensation with high accuracy by matching the delay time even for a signal which has small autocorrelation.
SOLUTION: A distortion compensator is provided with a zero-cross point calculater 11 for calculating the time that a digital signal converted through an A/D convertor 4 becomes zero in amplitude, a zero-cross point calculater 12 for calculating the time that an input signal becomes zero in amplitude, and a controller 13 for supplying time difference calculated by the zero-cross point calculaters 11 and 12 to an interpolation filter 5 and a delay device 6 as a delay control variable.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2004289542A Predistorter 有权
公开(公告)号：JP2004289542A
公开(公告)日：2004-10-14
申请号：JP2003079712
申请日：2003-03-24
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HORIGUCHI KENICHI , YASUNAGA YOSHINORI , HAYASHI RYOJI , NAGANO JUNICHI , NAKAYAMA MASATOSHI
IPC分类号： H03F1/32 , H04B1/04
摘要： PROBLEM TO BE SOLVED: To obtain a predistorter with good distortion compensating performance even when nonlinear characteristics of an amplifier include memory effects.
SOLUTION: The predistorter includes first and second delay circuits 10 and 11 connected with a distributor 7; a nonlinear circuit 4 connected with the distributor 7 for applying nonlinear characteristics reverse to the nonlinear characteristics of the amplifier 3 to an input signal; a synthesizer 9 for canceling an input signal component included in an output signal from the nonlinear circuit 4, and extracting only a nonlinear distortion component generated in the circuit 4 by synthesizing the output signal from the circuit 4 and an output signal from the second delay circuit 11 for outputting; a first filter circuit 12 for applying specific frequency characteristics to the extracted nonlinear distortion component; and a second synthesizer 8 for generating a synthesized signal of the output signal from the first filter circuit 12 and an output signal from the first delay circuit 10 for outputting to the amplifier 3.
COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP2009171389A Relay device 审中-公开
标题翻译：继电器
公开(公告)号：JP2009171389A
公开(公告)日：2009-07-30
申请号：JP2008008888
申请日：2008-01-18
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： NAGANO JUNICHI
IPC分类号： H04B7/15
摘要： PROBLEM TO BE SOLVED: To obtain a relay device which may not necessitate the change of external setting even in the case that the change of instruments is effected.
SOLUTION: The relay device 1 constitutes the same frequency network which receives a signal from an upstream side device. The relay device 1 transmits the signal to a downstream side device and is equipped with a delay device 17 capable of setting a delay time to add the delay time to the signal received according to the setting while the delay device 17 is equipped with a correlation detector 27 which detects a time difference between the transmitted signal and the received signal from correlation between the receiving signal and the transmitting signal in the relay device 1 to add the delay time according to the time difference between the setting and the detection of the delay time to the receiving signal.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：即使在进行仪器改变的情况下，获得可能不需要改变外部设定的中继装置。解决方案：中继设备1构成接收来自上游侧设备的信号的同一频率网络。中继设备1将信号发送到下游侧设备，并且配备有延迟设备17，延迟设备17能够设置延迟时间，以便在延迟设备17配备有相关检测器时根据设置将接收到的信号添加延迟时间 27，其通过中继装置1中的接收信号和发送信号之间的相关性来检测发送信号和接收信号之间的时间差，以根据设置和延迟时间的检测之间的时间差来添加延迟时间，接收信号。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2004363793A Distortion compensation device for power amplifier 有权
公开(公告)号：JP2004363793A
公开(公告)日：2004-12-24
申请号：JP2003158197
申请日：2003-06-03
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： NAGANO JUNICHI
IPC分类号： H03F1/32
摘要： PROBLEM TO BE SOLVED: To prevent a power amplifier from being broken owing to excessive signal input when the feedback system of a distortion compensation device for the power amplifier gets out of order.
SOLUTION: The distortion compensation device for the power amplifier is equipped with an A/D converter 5 which converts the output analog signal of the power amplifier 3 into a digital signal, a compensation coefficient arithmetic part 6 which calculates compensation coefficients by amplitudes according to an input digital signal delayed by a specified quantity and the converted digital signal, a normalization part 10 which normalizes calculated compensation coefficients by setting them to "1" at a specified amplitude, a memory 8 which stores the normalized compensation coefficients by the amplitudes and out of which a compensation coefficient is read according to the amplitude of the input digital signal, a multiplier 1 which multiplies the input digital signal by the read normalized compensation coefficient, and a 2nd multiplier 11 which varies the level of the converted digital signal by multiplying the digital signal inputted to the compensation coefficient arithmetic part 6 and converted by the A/D converter by the compensation coefficient of the specified amplitude in the normalization.
COPYRIGHT: (C)2005,JPO&NCIPI

5. 发明专利

JPH09200159A STATUS SUPERVISORY SYSTEM FOR RELAY BROADCAST STATION 失效
公开(公告)号：JPH09200159A
公开(公告)日：1997-07-31
申请号：JP644996
申请日：1996-01-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAGANO JUNICHI
IPC分类号： H04B17/40 , H04H20/00 , H04H20/06 , H04H20/12 , H04H1/00 , H04B17/02
摘要： PROBLEM TO BE SOLVED: To obtain the method informing a fault content quickly, accurately and surely to a management station by using a facsimile equipment so as to inform a fault notice of a relay broadcast equipment to the management information automatically. SOLUTION: A fault detector 2 detects a fault of a relay broadcast equipment 1 and data representing a fault content are fed to a facsimile coder 3. The facsimile coder 3 converts the data into facsimile data and sends the converted data to a line. A facsimile equipment 4 in a management station outputs the fault content of the relay broadcast equipment 1 and then the fault information is obtained.

6. 发明专利

JPH0324802A FEEDER STRUCTURE FOR GROUND ANTENNA 失效
公开(公告)号：JPH0324802A
公开(公告)日：1991-02-01
申请号：JP15878889
申请日：1989-06-21
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAGANO JUNICHI
IPC分类号： H01Q1/50
摘要： PURPOSE:To reduce the surge current flowing to a feeder due to a thunderbolt current by electrically unifying the leading-down part of the feeder with a pole brace and reducing the ground resistance of the sheath conductor of the feeder on the outside. CONSTITUTION:A leading-down part 7 of a feeder 1 is extended in a pole brace 4 and has one end connected to a connector 2 and has the other connected to the lower end part of the pole brace 4 and is connected to a coaxial cable 1 through a connector 8. Since a magnetic flux H due to the thunderbolt current flowing in the pole brace 4 does not penetrate the pole brace 4, a potential is not generated by the change of the magnetic flux. Since the coaxial cable 1 is connected to a ground rod 5 through the connector 8 and the pole brace 4, its ground resistance is reduced, and the surge current flowing to the coaxial cable 1 at the time of thunderbolt to an arrester 6 is in the low level. Thus, the surge current for thunderbolt is considerably reduced.

7. 发明专利

JPH08181627A TELEVISION RELAY BROADCAST EQUIPMENT 失效
公开(公告)号：JPH08181627A
公开(公告)日：1996-07-12
申请号：JP31883394
申请日：1994-12-21
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAGANO JUNICHI
IPC分类号： H04B1/26 , H04B7/15 , H04N5/00
摘要： PURPOSE: To make the transmission frequency stable by controlling an oscillating frequency of a voltage controlled local oscillator with an output of a low-pass filter passing a prescribed frequency of an output of a phase comparator so as to operate stably a phase locked loop. CONSTITUTION: A 1st mixer 2 mixes an intermediate frequency IF signal 101 fed to a television relay broadcast equipment with an LO signal 103 fed from a voltage controlled local oscillator 1 to generate a transmission signal. Then a band-pass filter 3 eliminates undesired components of an output signal from the mixer 2 other than the transmission signal and a power amplifier 4 amplifies an output signal 3 of the filter 3 up to a specified output level and provides an output of a transmission signal 102. Furthermore, a low-pass filter 6 eliminates an undesired component of an output signal from the phase comparator 5 and outputs a control voltage to control the oscillating frequency of the oscillator 1. On the other hand, a reference oscillator 7 receiving an output of the comparator 5 outputs a highly stable oscillation frequency. Various frequencies are generated based on the oscillation frequency.

8. 发明专利

JPH06331729A GROUND CLUTTER REMOVING METHOD FOR RADAR 失效
公开(公告)号：JPH06331729A
公开(公告)日：1994-12-02
申请号：JP12180993
申请日：1993-05-25
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAGANO JUNICHI
IPC分类号： G01S7/02 , G01S7/36 , G01S7/40
摘要： PURPOSE:To obtain a ground clutter removing method for radar which allows searching of a target separated by the same distance as a maintain from a radar antenna with no influence of ground clutter. CONSTITUTION:A pseudo-signal having the same amplitude and reverse phase from ground clutter 3a contained in a radio wave received at an input end of a radar antenna 1 is transmitted, in synchronism with the receiving timing of ground clutter 3a, from a pseudo-transmitter 101 to the antenna 1.

9. 发明专利

JP2003198270A PREDISTORTER, LOW-DISTORTION AMPLIFIER, AND DISTORTION- COMPENSATING METHOD 审中-公开
公开(公告)号：JP2003198270A
公开(公告)日：2003-07-11
申请号：JP2001394835
申请日：2001-12-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： HORIGUCHI KENICHI , NAKAYAMA MASATOSHI , NAGANO JUNICHI , YASUNAGA YOSHINORI
IPC分类号： H03F1/32
摘要： PROBLEM TO BE SOLVED: To solve the problem that distortion compensation performance results in deterioration by generating time discontinuity in compensation data in a compensation table. SOLUTION: There are a coefficient calculation section 7 that uses feedback and input signals and calculates an input signal amplitude value rk and distortion compensation coefficients Ak and Bk as compensation data, a compensation table preparation section 8 that stores a fixed amount of compensation data (rk, Ak, and Bk) that are calculated at the coefficient calculation section 7, and rearranges the fixed amount of compensation data in the order of the size of the input signal amplitude value rk for preparing a new compensation table, a table replacement section 9 that overrides the entire compensation data of the new compensation table onto a compensation table 10 that is being used currently, an amplitude detection means 11 for detecting an amplitude value ri of the input signal, and a distortion compensation section 12 that reads compensation data (ri, Ai, and Bi), having the input signal amplitude value corresponding to the amplitude value ri of the input signal, uses the distortion compensation coefficients Ai and Bi of the compensation data for allowing the input signal to be subjected to predistortion processing, and carries out output to a modulator 3 and an amplifier 4. COPYRIGHT: (C)2003,JPO

10. 发明专利

JPH0661896A SYNCHRONIZATION DEVICE FOR TELEVISION RELAY BROADCAST EQUIPMENT 失效
公开(公告)号：JPH0661896A
公开(公告)日：1994-03-04
申请号：JP22942592
申请日：1992-08-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAGANO JUNICHI
IPC分类号： H04B7/15 , H04N5/00
摘要： PURPOSE:To attain stable operation even when degree of modulation of a trans mission video signal is large and to dispense with the adjustment in all television channels for a VHF band by using a narrow band limiter to suppress a video amplitude modulation component. CONSTITUTION:A transmission video signal of a VHF channel including an amplitude modulation component is inputted to a mixer 3. A BPF extracts a signal of 2.75MHz having a lowest frequency in those of an output signal of the mixer 3, a limiter 5 eliminates the amplitude modulation component, a waveform generator 6 converts the result into a 2.75MHz pulse and it is converted into a 25kHz pulse by a frequency divider 7. On the other hand, part of the output of a 6MHz oscillator 1 is subject to 1/240 frequency division by a frequency divider 8 to obtain a 25kHz pulse and the phase is compared with a phase of a 25kHz pulse received from the frequency divider 7 at a phase comparator 9. Its phase error voltage controls an output frequency of a sender use local oscillator in a transmitter of a TV repeater main body 100 via an LPF 10.

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