JPS55107308A - Nonlinear compensation system of automatic following type - Google Patents

Nonlinear compensation system of automatic following type

Info

Publication number
JPS55107308A
JPS55107308A JP1435879A JP1435879A JPS55107308A JP S55107308 A JPS55107308 A JP S55107308A JP 1435879 A JP1435879 A JP 1435879A JP 1435879 A JP1435879 A JP 1435879A JP S55107308 A JPS55107308 A JP S55107308A
Authority
JP
Japan
Prior art keywords
nonlinear
band
distortion
noise
compensated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1435879A
Other languages
Japanese (ja)
Other versions
JPS6113648B2 (en
Inventor
Toshio Nojima
Toru Ooyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1435879A priority Critical patent/JPS55107308A/en
Priority to DE3002995A priority patent/DE3002995C2/en
Priority to US06/117,282 priority patent/US4329655A/en
Publication of JPS55107308A publication Critical patent/JPS55107308A/en
Publication of JPS6113648B2 publication Critical patent/JPS6113648B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3276—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using the nonlinearity inherent to components, e.g. a diode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3227—Adaptive predistortion based on amplitude, envelope or power level feedback from the output of the main amplifier

Abstract

PURPOSE:To make stable the non-linear type compensation characteristics automatically, by detecting the distortion noise at the output terminal of compensated amplifier and automatically controlling the non-linear form of amplitude and phase of the nonlinear type compensation circuit so that the level can be minimized. CONSTITUTION:The band block filter 2 sufficiently rejects the noise component of specific narrow band so that the information signal in the transmission signal band is not present beforehand. Next, by using the nonlinear type distortion detector 12 provided at the output of the compensated amplifier 9, the distortion noise of nonlinear form which is fallen in the band is detected. Further, the amplitude and phase of the third order mutual modulation distortion noise put in with the predistortion non-linear type compensation circuit 14 are automatically controlled with the nonlinear type characteristic controller 13 so that the detected distortion noise can be minimized. Thus, the nonlinearity of the amplifier 9 can be compensated with highly stable state.
JP1435879A 1979-02-13 1979-02-13 Nonlinear compensation system of automatic following type Granted JPS55107308A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1435879A JPS55107308A (en) 1979-02-13 1979-02-13 Nonlinear compensation system of automatic following type
DE3002995A DE3002995C2 (en) 1979-02-13 1980-01-29 Customizable equalization system
US06/117,282 US4329655A (en) 1979-02-13 1980-01-31 Adaptive equalization system for nonlinearities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1435879A JPS55107308A (en) 1979-02-13 1979-02-13 Nonlinear compensation system of automatic following type

Publications (2)

Publication Number Publication Date
JPS55107308A true JPS55107308A (en) 1980-08-18
JPS6113648B2 JPS6113648B2 (en) 1986-04-15

Family

ID=11858838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1435879A Granted JPS55107308A (en) 1979-02-13 1979-02-13 Nonlinear compensation system of automatic following type

Country Status (1)

Country Link
JP (1) JPS55107308A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814608A (en) * 1981-07-20 1983-01-27 Nec Corp Nonlinear distortion eliminating circuit
JPS6025310A (en) * 1983-07-22 1985-02-08 Fujitsu Ltd Fet linear power amplifier for ssb multiplex radio equipment
JPH01260904A (en) * 1988-04-11 1989-10-18 Fujitsu Ltd Distortion compensation device
JPH0210902A (en) * 1988-06-28 1990-01-16 Fujitsu Ltd Distortion compensation device
JPH07503926A (en) * 1991-12-30 1995-04-27 ポリートップ　コーポレーション Obturator with protective flange and sloped top lid that cannot be opened by children
JPH08307161A (en) * 1995-05-02 1996-11-22 Nec Corp Feedforward amplifier
US5963090A (en) * 1996-11-13 1999-10-05 Nec Corporation Automatic predistortion adjusting circuit having stable non-linear characteristics regardless of input signal frequency
JP2003520479A (en) * 2000-01-07 2003-07-02 スペクトリアン コーポレーシヨン Traction detector carrier blanking mechanism used to measure and correct RF power amplifier distortion
JP2004112151A (en) * 2002-09-17 2004-04-08 Hitachi Kokusai Electric Inc Method for compensating for distortion and transmitter
JP2005253045A (en) * 2004-02-03 2005-09-15 Ntt Docomo Inc Power series type predistorter for multiple frequency bands
JP2010093785A (en) * 2008-09-10 2010-04-22 Ntt Docomo Inc Power series predistorter, and control method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0434793Y2 (en) * 1986-06-05 1992-08-18
JPH0517964Y2 (en) * 1988-11-30 1993-05-13

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814608A (en) * 1981-07-20 1983-01-27 Nec Corp Nonlinear distortion eliminating circuit
JPH0586082B2 (en) * 1981-07-20 1993-12-09 Nippon Electric Co
JPS6025310A (en) * 1983-07-22 1985-02-08 Fujitsu Ltd Fet linear power amplifier for ssb multiplex radio equipment
JPH0552084B2 (en) * 1983-07-22 1993-08-04 Fujitsu Ltd
JPH01260904A (en) * 1988-04-11 1989-10-18 Fujitsu Ltd Distortion compensation device
JPH0210902A (en) * 1988-06-28 1990-01-16 Fujitsu Ltd Distortion compensation device
JPH07503926A (en) * 1991-12-30 1995-04-27 ポリートップ　コーポレーション Obturator with protective flange and sloped top lid that cannot be opened by children
JPH08307161A (en) * 1995-05-02 1996-11-22 Nec Corp Feedforward amplifier
US5963090A (en) * 1996-11-13 1999-10-05 Nec Corporation Automatic predistortion adjusting circuit having stable non-linear characteristics regardless of input signal frequency
JP2003520479A (en) * 2000-01-07 2003-07-02 スペクトリアン コーポレーシヨン Traction detector carrier blanking mechanism used to measure and correct RF power amplifier distortion
JP2004112151A (en) * 2002-09-17 2004-04-08 Hitachi Kokusai Electric Inc Method for compensating for distortion and transmitter
JP2005253045A (en) * 2004-02-03 2005-09-15 Ntt Docomo Inc Power series type predistorter for multiple frequency bands
JP4576221B2 (en) * 2004-02-03 2010-11-04 株式会社エヌ・ティ・ティ・ドコモ Power series predistorter for multi-frequency band
JP2010093785A (en) * 2008-09-10 2010-04-22 Ntt Docomo Inc Power series predistorter, and control method thereof

Also Published As

Publication number Publication date
JPS6113648B2 (en) 1986-04-15

Similar Documents

Publication Publication Date Title
JPS55107308A (en) Nonlinear compensation system of automatic following type
JPS55158715A (en) Gain control circuit
JPS5685909A (en) Automatic following type nonlinear compensation system
GB1525904A (en) Automatic noise limiter
JPS5737909A (en) Wide band electric power amplifier
GB1295769A (en)
JPS57120207A (en) Reproducing device for multiple-recorded information
JPS5446420A (en) Dubbing system
JPS5382110A (en) Compensating circuit for non-linearity
JPS5664508A (en) Low-band compensating circuit
JPS5350959A (en) Automatic gain control device
JPS554186A (en) Broad-band power amplifier
JPS55159607A (en) Fm reproduction unit
JPS5552022A (en) Light modulating device
JPS5625808A (en) Automatic gain control circuit for amplitude modulator
JPS5394156A (en) Non-linear compensation circuit
JPS525240A (en) Signal compensator of high frequency amplifier
JPS55149589A (en) Frequency characteristic improving circuit for color signal
JPS5217745A (en) Non-linear distortion compensator circuit
JPS5617588A (en) Direct current compensating circuit
JPS5443448A (en) Compressor
JPS5750156A (en) Am detection system
JPS6429080A (en) Acc circuit
JPS5752242A (en) Noise reducing circuit
JPS5769915A (en) Automatic gain control circuit