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
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000011045 prefiltration Methods 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Description
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)
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5484952A (en) * | 1977-12-20 | 1979-07-06 | Nippon Telegr & Teleph Corp <Ntt> | Automatic equalizer |
-
1986
- 1986-03-04 JP JP1986030734U patent/JPH0611678Y2/en not_active Expired - Lifetime
Patent Citations (1)
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)
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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