JPS5713820A - Nonlinear distortion eliminating circuit - Google Patents

Nonlinear distortion eliminating circuit

Info

Publication number
JPS5713820A
JPS5713820A JP8742380A JP8742380A JPS5713820A JP S5713820 A JPS5713820 A JP S5713820A JP 8742380 A JP8742380 A JP 8742380A JP 8742380 A JP8742380 A JP 8742380A JP S5713820 A JPS5713820 A JP S5713820A
Authority
JP
Japan
Prior art keywords
detector
nonlinear distortion
correcting circuit
nonlinear
output
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
JP8742380A
Other languages
Japanese (ja)
Other versions
JPS6310614B2 (en
Inventor
Junji Namiki
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
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8742380A priority Critical patent/JPS5713820A/en
Publication of JPS5713820A publication Critical patent/JPS5713820A/en
Publication of JPS6310614B2 publication Critical patent/JPS6310614B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception

Abstract

PURPOSE:To eliminate the nonlinear distortion of a digital modulation input by controlling a nonlinear correcting circuit by providing a phase rotation detector and an amplitude error detector. CONSTITUTION:The output of a nonlinear correcting circuit 1 is supplied to a phase rotation detector 2 and an amplitude error detector 3. Then, both the detectors 2 and 3 detect a phase rotation and amplitude variation due to nonlinear distortion from a difference between an input and an output signal to and from a discriminator 20 which estimates a transmitted code. The output of the detector 2 is supplied as a control signal to the variable attenuator 12 of the correcting circuit 1 via a polarity inverting circuit 24 and an integrator 25. The detection output of the detector 3, on the other hand, is supplied to the phase shifter 11 of the correcting circuit 1 via an LPF33 to exercise phase control. Thus, the nonlinear distortion of a digital modulation input is eliminated.
JP8742380A 1980-06-27 1980-06-27 Nonlinear distortion eliminating circuit Granted JPS5713820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8742380A JPS5713820A (en) 1980-06-27 1980-06-27 Nonlinear distortion eliminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8742380A JPS5713820A (en) 1980-06-27 1980-06-27 Nonlinear distortion eliminating circuit

Publications (2)

Publication Number Publication Date
JPS5713820A true JPS5713820A (en) 1982-01-23
JPS6310614B2 JPS6310614B2 (en) 1988-03-08

Family

ID=13914455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8742380A Granted JPS5713820A (en) 1980-06-27 1980-06-27 Nonlinear distortion eliminating circuit

Country Status (1)

Country Link
JP (1) JPS5713820A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497210A (en) * 1982-07-05 1985-02-05 Tokyo Shibaura Denki Kabushiki Kaisha Phased array ultrasonic testing apparatus and testing method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497210A (en) * 1982-07-05 1985-02-05 Tokyo Shibaura Denki Kabushiki Kaisha Phased array ultrasonic testing apparatus and testing method therefor

Also Published As

Publication number Publication date
JPS6310614B2 (en) 1988-03-08

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