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JPS55149524A - Automatic equalizing system - Google Patents

Automatic equalizing system

Info

Publication number
JPS55149524A
JPS55149524A JP5781479A JP5781479A JPS55149524A JP S55149524 A JPS55149524 A JP S55149524A JP 5781479 A JP5781479 A JP 5781479A JP 5781479 A JP5781479 A JP 5781479A JP S55149524 A JPS55149524 A JP S55149524A
Authority
JP
Japan
Prior art keywords
automatic equalizer
circulating type
delay time
circuit
circulating
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.)
Pending
Application number
JP5781479A
Other languages
Japanese (ja)
Inventor
Junzo Murakami
Shunichi Onishi
Masaharu Obara
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.)
Toshiba Corp
Japan Broadcasting Corp
Original Assignee
Toshiba Corp
Nippon Hoso Kyokai NHK
Tokyo Shibaura Electric Co Ltd
Japan Broadcasting 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 Toshiba Corp, Nippon Hoso Kyokai NHK, Tokyo Shibaura Electric Co Ltd, Japan Broadcasting Corp filed Critical Toshiba Corp
Priority to JP5781479A priority Critical patent/JPS55149524A/en
Publication of JPS55149524A publication Critical patent/JPS55149524A/en
Pending 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
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03133—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a non-recursive structure
    • 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
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03146—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a 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 improve the stability of operation and performance of equalization, by combining the first automatic equalizer of non-circulating type and the second automatic equalizer possible for the switching between the auxiliary delay means and non-circulating type, circulating type. CONSTITUTION:The signal to the input terminal IN is first input to the automatic equalizer 100 of non-circulating type to cancel the ghost in the range of delay time 0-MT (where; T is the delay time between taps) at the transversal filter 101 consisting of the tapped delay element 111 having the tap number M, weight circuit 112, and addition circuit 113. The output signal is introduced to the second automatic equalizer 200 and picked up at the output terminal OUT via the auxiliary delay element 206, transversal filter 201 and operation circuit. The second automatic equalizer 200 can cope with the ghost in the range of the delay time (M+1)T-NT. The second automatic equalizer 200, after the operation stop of the tap gain correction and operation circuit 202, is in circulating constitution by changing over the switch 251 to the position b.
JP5781479A 1979-05-11 1979-05-11 Automatic equalizing system Pending JPS55149524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5781479A JPS55149524A (en) 1979-05-11 1979-05-11 Automatic equalizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5781479A JPS55149524A (en) 1979-05-11 1979-05-11 Automatic equalizing system

Publications (1)

Publication Number Publication Date
JPS55149524A true JPS55149524A (en) 1980-11-20

Family

ID=13066381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5781479A Pending JPS55149524A (en) 1979-05-11 1979-05-11 Automatic equalizing system

Country Status (1)

Country Link
JP (1) JPS55149524A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190428A (en) * 1981-05-19 1982-11-24 Hitachi Ltd Ghost removing device
EP0472374A2 (en) * 1990-08-17 1992-02-26 Kabushiki Kaisha Toshiba Transversal equalizer
US5493585A (en) * 1991-04-23 1996-02-20 U.S. Philips Corporation Semi-recursive adaptive equalizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190428A (en) * 1981-05-19 1982-11-24 Hitachi Ltd Ghost removing device
EP0472374A2 (en) * 1990-08-17 1992-02-26 Kabushiki Kaisha Toshiba Transversal equalizer
US5493585A (en) * 1991-04-23 1996-02-20 U.S. Philips Corporation Semi-recursive adaptive equalizer

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