FI843460A0 - ADAPTIVT CORRECTION FILTER. - Google Patents
ADAPTIVT CORRECTION FILTER.Info
- Publication number
- FI843460A0 FI843460A0 FI843460A FI843460A FI843460A0 FI 843460 A0 FI843460 A0 FI 843460A0 FI 843460 A FI843460 A FI 843460A FI 843460 A FI843460 A FI 843460A FI 843460 A0 FI843460 A0 FI 843460A0
- Authority
- FI
- Finland
- Prior art keywords
- signals
- evaluation
- elements
- outputs
- chain
- Prior art date
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
- H04L25/0305—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure using blind adaptation
-
- 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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Networks Using Active Elements (AREA)
Abstract
In order to equalise communications signals transmitted in one or more transmission channels (X, Y) in the form of amplitude-modulated signals, an adaptive equaliser is provided which has at least one chain of delay elements (T) at the outputs of which the signals supplied to the chain each occur offset by a prescribed period. Connected to the inputs or outputs of the delay elements are evaluation elements which in each case multiply the signals occurring at the associated input or output by an evaluation coefficient (a1, b1; ..., an, bn). The signals resulting therefrom are summed in a summing circuit (S1, S2). Connected to this summing circuit is a decision stage (ES) which transmits an error signal (Fa, Fb). Connected to each of the said evaluation elements is a limiter arrangement (B1, B2) which limits the range of values of the evaluation coefficient produced in each case on the basis of the error signal transmitted by the decision stage. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833331932 DE3331932A1 (en) | 1983-09-05 | 1983-09-05 | Adaptive equaliser error signal feedback usage |
Publications (2)
Publication Number | Publication Date |
---|---|
FI843460A0 true FI843460A0 (en) | 1984-09-04 |
FI843460A FI843460A (en) | 1985-03-06 |
Family
ID=6208234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI843460A FI843460A (en) | 1983-09-05 | 1984-09-04 | ADAPTIVT CORRECTION FILTER. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0143214B1 (en) |
AT (1) | ATE69530T1 (en) |
DE (2) | DE3331932A1 (en) |
FI (1) | FI843460A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7218672B2 (en) | 2001-10-16 | 2007-05-15 | Koninklijke Philips Electronics N.V. | Apparatus and method for constraining the value of feedback filter tap coefficients in a decision feedback equalizer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3368168A (en) * | 1965-06-02 | 1968-02-06 | Bell Telephone Labor Inc | Adaptive equalizer for digital transmission systems having means to correlate present error component with past, present and future received data bits |
US3781720A (en) * | 1973-01-04 | 1973-12-25 | Bell Telephone Labor Inc | Automatic tap-gain incrementation of adaptive equalizers |
JPS5314537A (en) * | 1976-07-26 | 1978-02-09 | Nec Corp | Automatic equalizer |
JPS57211817A (en) * | 1981-06-23 | 1982-12-25 | Fujitsu Ltd | Transversal type automatic equalizer |
-
1983
- 1983-09-05 DE DE19833331932 patent/DE3331932A1/en not_active Withdrawn
-
1984
- 1984-09-03 EP EP84110466A patent/EP0143214B1/en not_active Expired - Lifetime
- 1984-09-03 DE DE8484110466T patent/DE3485263D1/en not_active Expired - Fee Related
- 1984-09-03 AT AT84110466T patent/ATE69530T1/en not_active IP Right Cessation
- 1984-09-04 FI FI843460A patent/FI843460A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE3331932A1 (en) | 1985-03-21 |
EP0143214A2 (en) | 1985-06-05 |
EP0143214B1 (en) | 1991-11-13 |
ATE69530T1 (en) | 1991-11-15 |
FI843460A (en) | 1985-03-06 |
EP0143214A3 (en) | 1988-02-17 |
DE3485263D1 (en) | 1991-12-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed |
Owner name: SIEMENS AKTIENGESELLSCHAFT |