JPS62143340U - - Google Patents

Info

Publication number
JPS62143340U
JPS62143340U JP3073486U JP3073486U JPS62143340U JP S62143340 U JPS62143340 U JP S62143340U JP 3073486 U JP3073486 U JP 3073486U JP 3073486 U JP3073486 U JP 3073486U JP S62143340 U JPS62143340 U JP S62143340U
Authority
JP
Japan
Prior art keywords
linear phase
filter
processing circuit
utility
model registration
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
JP3073486U
Other languages
Japanese (ja)
Other versions
JPH0611678Y2 (en
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 filed Critical
Priority to JP1986030734U priority Critical patent/JPH0611678Y2/en
Publication of JPS62143340U publication Critical patent/JPS62143340U/ja
Application granted granted Critical
Publication of JPH0611678Y2 publication Critical patent/JPH0611678Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例を示す自動等化器の構
成ブロツク図、第２図は従来の自動等化器の構成
ブロツク図、第３図ａ，ｂは第１図における等化
動作を示すもので、同図ａは孤立波応答図、同図
ｂは周波数特性図である。 ３…プリフイルタ、４…Ａ／Ｄ変換器、７…制
御回路、１５…可変フイルタ、１６…固定フイル
タ。 FIG. 1 is a block diagram of the configuration of an automatic equalizer showing an embodiment of the present invention, FIG. 2 is a block diagram of a conventional automatic equalizer, and FIGS. 3a and 3b illustrate the equalization operation in FIG. Fig. 5A is a solitary wave response diagram, and Fig. 1B is a frequency characteristic diagram. 3... Prefilter, 4... A/D converter, 7... Control circuit, 15... Variable filter, 16... Fixed filter.

Claims (1)

【実用新案登録請求の範囲】 １ デイジタル処理回路を用いて構成したデイジ
タル加入者線用自動等化器において、 前記デイジタル処理回路部分を、 線路状況に応じて特性の変化可能な可変フイル
タと、 線路状況に無関係に特性が一定な直線位相フイ
ルタからなる固定フイルタとで、 構成したことを特徴とする自動等化器。 ２ 固定フイルタとして、伝達関数が Ｈ（Ｚ）＝ａ＋ｂ・Ｚ−１＋ａ・Ｚ−２，ａ，
ｂ：定数で表わされる２次直線位相フイルタを用
いるが、あるいは、該２次直線位相フイルタを複
数個縦続接続して用いることを特徴とする実用新
案登録請求の範囲第１項記載の自動等化器。[Claims for Utility Model Registration] 1. In an automatic equalizer for a digital subscriber line configured using a digital processing circuit, the digital processing circuit portion is comprised of: a variable filter whose characteristics can be changed according to line conditions; and a line. An automatic equalizer characterized by comprising a fixed filter consisting of a linear phase filter whose characteristics are constant regardless of the situation. 2 As a fixed filter, the transfer function is H(Z)=a+b・Z −1 +a・Z −2 , a,
b: Automatic equalization according to claim 1 of the utility model registration, characterized in that a quadratic linear phase filter expressed by a constant is used, or a plurality of quadratic linear phase filters are connected in cascade. vessel.
JP1986030734U 1986-03-04 1986-03-04 Automatic equalizer Expired - Lifetime JPH0611678Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986030734U JPH0611678Y2 (en) 1986-03-04 1986-03-04 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986030734U JPH0611678Y2 (en) 1986-03-04 1986-03-04 Automatic equalizer

Publications (2)

Publication Number Publication Date
JPS62143340U true JPS62143340U (en) 1987-09-10
JPH0611678Y2 JPH0611678Y2 (en) 1994-03-23

Family

ID=30835816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986030734U Expired - Lifetime JPH0611678Y2 (en) 1986-03-04 1986-03-04 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPH0611678Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013157980A (en) * 2012-01-27 2013-08-15 Tektronix Inc Variable inter-symbol interference generator and data signal generation method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484952A (en) * 1977-12-20 1979-07-06 Nippon Telegr & Teleph Corp <Ntt> Automatic equalizer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484952A (en) * 1977-12-20 1979-07-06 Nippon Telegr & Teleph Corp <Ntt> Automatic equalizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013157980A (en) * 2012-01-27 2013-08-15 Tektronix Inc Variable inter-symbol interference generator and data signal generation method

Also Published As

Publication number Publication date
JPH0611678Y2 (en) 1994-03-23

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