JPS54151349A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS54151349A
JPS54151349A JP6026578A JP6026578A JPS54151349A JP S54151349 A JPS54151349 A JP S54151349A JP 6026578 A JP6026578 A JP 6026578A JP 6026578 A JP6026578 A JP 6026578A JP S54151349 A JPS54151349 A JP S54151349A
Authority
JP
Japan
Prior art keywords
filter
digital information
output
carriers
error
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
JP6026578A
Other languages
Japanese (ja)
Other versions
JPS6145416B2 (en
Inventor
Yoichi Sato
Fumio Akashi
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 JP6026578A priority Critical patent/JPS54151349A/en
Publication of JPS54151349A publication Critical patent/JPS54151349A/en
Publication of JPS6145416B2 publication Critical patent/JPS6145416B2/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
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To detect the digital information and analog information correctly in separtion, by automatically removing the waveform distortion in the delivery line, in the raster mapping method extending the orthogonal amplitude modulation which simultaneously amplitude-modulates two carriers. CONSTITUTION:In the method simultaneously transmitting the analog and digital information through the use of the raster mapping method which extends the orthogonal amplitude modulation simultaneously amplitude-modulating two carriers of sinusoidal and cosine waves, the delay elements 3 to 6 inputting two base band signals from the terminals 1 and 2 and the two dimensional transversal filter consisting of the two dimensional bridge type variable attenuators 13 to 15 and the adders 16 and 17 are provided. Further, the estination unit 27 which outputs the estimation value of one digital information from two output signals of the filter and the tap gain correction circuit 23 obtaining this estimated value and the error with the output of the filter are provided. The output of the circuit 23 is added to the attenuators 13 to 15 adjust the tap gain of the variable complex number of the filter through the use of the estimated value and the error.
JP6026578A 1978-05-19 1978-05-19 Automatic equalizer Granted JPS54151349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6026578A JPS54151349A (en) 1978-05-19 1978-05-19 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6026578A JPS54151349A (en) 1978-05-19 1978-05-19 Automatic equalizer

Publications (2)

Publication Number Publication Date
JPS54151349A true JPS54151349A (en) 1979-11-28
JPS6145416B2 JPS6145416B2 (en) 1986-10-08

Family

ID=13137138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6026578A Granted JPS54151349A (en) 1978-05-19 1978-05-19 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS54151349A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107614A (en) * 1980-01-31 1981-08-26 Nec Corp Automatic equalizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107614A (en) * 1980-01-31 1981-08-26 Nec Corp Automatic equalizer
JPS639408B2 (en) * 1980-01-31 1988-02-29 Nippon Electric Co

Also Published As

Publication number Publication date
JPS6145416B2 (en) 1986-10-08

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