JPH0580856B2 - - Google Patents

Info

Publication number
JPH0580856B2
JPH0580856B2 JP60057138A JP5713885A JPH0580856B2 JP H0580856 B2 JPH0580856 B2 JP H0580856B2 JP 60057138 A JP60057138 A JP 60057138A JP 5713885 A JP5713885 A JP 5713885A JP H0580856 B2 JPH0580856 B2 JP H0580856B2
Authority
JP
Japan
Prior art keywords
output
circuit
signal
memory
amplifier
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.)
Expired - Lifetime
Application number
JP60057138A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61214843A (ja
Inventor
Yoshiaki Nagata
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP60057138A priority Critical patent/JPS61214843A/ja
Priority to US06/841,217 priority patent/US4700151A/en
Priority to GB08606965A priority patent/GB2173074B/en
Publication of JPS61214843A publication Critical patent/JPS61214843A/ja
Publication of JPH0580856B2 publication Critical patent/JPH0580856B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C5/00—Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal
    • 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
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • 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
    • H03F1/3282—Acting on the phase and the amplitude of the input signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
    • H03C2200/0004—Circuit elements of modulators
    • H03C2200/0029—Memory circuits, e.g. ROMs, RAMs, EPROMs, latches, shift registers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
    • H03C2200/0037—Functional aspects of modulators
    • H03C2200/0058—Quadrature arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
    • H03C2200/0037—Functional aspects of modulators
    • H03C2200/0079—Measures to linearise modulation or reduce distortion of modulation characteristics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/06—Means for changing frequency deviation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/57—Separate feedback of real and complex signals being present
    • 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
    • H03F2201/3233—Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Amplitude Modulation (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
JP60057138A 1985-03-20 1985-03-20 変調装置 Granted JPS61214843A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP60057138A JPS61214843A (ja) 1985-03-20 1985-03-20 変調装置
US06/841,217 US4700151A (en) 1985-03-20 1986-03-19 Modulation system capable of improving a transmission system
GB08606965A GB2173074B (en) 1985-03-20 1986-03-20 Modulation system capable of improving a transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60057138A JPS61214843A (ja) 1985-03-20 1985-03-20 変調装置

Publications (2)

Publication Number Publication Date
JPS61214843A JPS61214843A (ja) 1986-09-24
JPH0580856B2 true JPH0580856B2 (enrdf_load_stackoverflow) 1993-11-10

Family

ID=13047202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60057138A Granted JPS61214843A (ja) 1985-03-20 1985-03-20 変調装置

Country Status (1)

Country Link
JP (1) JPS61214843A (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0771118B2 (ja) * 1989-12-27 1995-07-31 三菱電機株式会社 変調装置
US5343500A (en) * 1991-09-03 1994-08-30 At&T Bell Laboratories Non-linear encoder and decoder for information transmission through non-linear channels
JP2887987B2 (ja) * 1991-10-23 1999-05-10 日本電気株式会社 ディジタル変調回路
JP2883260B2 (ja) * 1993-04-20 1999-04-19 三菱電機株式会社 歪補償回路
JP3156439B2 (ja) * 1993-04-20 2001-04-16 三菱電機株式会社 歪補償回路
JPH0832464A (ja) * 1994-07-15 1996-02-02 Uniden Corp 送信機におけるキャリアリーク補正方法
JP2967699B2 (ja) * 1995-03-06 1999-10-25 日本電気株式会社 送信装置
JP4597100B2 (ja) * 1997-09-05 2010-12-15 富士通株式会社 高周波電力増幅器用非線形補償回路
JPH11243430A (ja) * 1998-02-25 1999-09-07 Sumitomo Electric Ind Ltd 直交変調器
DE69933243T2 (de) * 1999-07-28 2007-04-12 Fujitsu Ltd., Kawasaki Funkgerät mit verzerrungskompensation
WO2001008320A1 (fr) * 1999-07-28 2001-02-01 Fujitsu Limited Procede et appareil pour compensation de distorsion de dispositif radio
JP4490349B2 (ja) * 1999-10-08 2010-06-23 株式会社日立国際電気 負帰還方式による非線形歪み補償回路を用いた送信機
JP4722146B2 (ja) * 1999-12-28 2011-07-13 富士通株式会社 歪補償装置
JP4555429B2 (ja) * 2000-04-03 2010-09-29 株式会社ケンウッド プリディストーション型非線形歪み補償回路およびこれを用いたディジタル送信機
JP4767583B2 (ja) 2004-06-29 2011-09-07 パナソニック株式会社 歪補償回路
CN114384405A (zh) * 2021-12-21 2022-04-22 南京理工大学 一种多速率可调节采样率频率的测量asic芯片

Also Published As

Publication number Publication date
JPS61214843A (ja) 1986-09-24

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