NO960575L - Fremgangsmåte og kretser for fraksjonsadskilt utjevning - Google Patents
Fremgangsmåte og kretser for fraksjonsadskilt utjevningInfo
- Publication number
- NO960575L NO960575L NO960575A NO960575A NO960575L NO 960575 L NO960575 L NO 960575L NO 960575 A NO960575 A NO 960575A NO 960575 A NO960575 A NO 960575A NO 960575 L NO960575 L NO 960575L
- Authority
- NO
- Norway
- Prior art keywords
- fraction
- introducing
- matching
- white filter
- technique
- 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
- H04L25/03044—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 fractionally spaced delay lines or combinations of fractionally integrally spaced taps
-
- 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
- H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
- H04L2025/03439—Fixed structures
- H04L2025/03445—Time domain
- H04L2025/03471—Tapped delay lines
- H04L2025/03509—Tapped delay lines fractionally spaced
-
- 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
- H04L2025/03592—Adaptation methods
- H04L2025/03598—Algorithms
- H04L2025/03611—Iterative algorithms
- H04L2025/03617—Time recursive algorithms
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)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Det er beskrevet en fremgangsmåte for fraksjonsadskilt tilpassende utjevning, som tillater at det oppnås ytelser som en optimal lineær mottager med en stor grad av stabilitet for styrealgoritmene. Teknikken kan anvendes på kommunikasjons- systemer av en viss art. Det er også frambragt en fraksjons- adskilt tilpassende utj evner som er stabil til det perfekte og har god konvergensrate uten å innføre noen forringelse av ytelsene med hensyn til den optimale mottager og med en ekstremt liten økning i realiseringens kompleksitet sammen- lignet med tidligere kjent teknikk. Oppfinnelsen er basert på at det innføres et hvitte-filter for inngangssignalet til en fraksjonsadskilt tilpassende utj evner som er stabilisert med en grenlekkasje-teknikk, idet hvitte-filteret er en innretning som er i stand til å gjøre signalets effektspektrum-densitet - gjentatt med en periode lik den resiproke verdi av signaler- ingsmellomrommet ¿ konstant.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI950355A IT1273963B (it) | 1995-02-24 | 1995-02-24 | Metodo e circuiti di equalizzazione a spaziatura frazionata |
Publications (2)
Publication Number | Publication Date |
---|---|
NO960575D0 NO960575D0 (no) | 1996-02-14 |
NO960575L true NO960575L (no) | 1996-08-26 |
Family
ID=11370680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO960575A NO960575L (no) | 1995-02-24 | 1996-02-14 | Fremgangsmåte og kretser for fraksjonsadskilt utjevning |
Country Status (9)
Country | Link |
---|---|
US (1) | US5751768A (no) |
EP (1) | EP0729254B1 (no) |
JP (1) | JPH08321795A (no) |
CN (1) | CN1078983C (no) |
BR (1) | BR9600786A (no) |
CA (1) | CA2170195A1 (no) |
DE (1) | DE69625397T2 (no) |
IT (1) | IT1273963B (no) |
NO (1) | NO960575L (no) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09294095A (ja) * | 1996-04-26 | 1997-11-11 | Oki Electric Ind Co Ltd | 適応等化器 |
US6952444B1 (en) | 1996-07-19 | 2005-10-04 | Texas Instruments Incorporated | Blind DFE and phase correction |
AU737373B2 (en) * | 1996-07-19 | 2001-08-16 | Libit Signal Processing Limited | Blind DFE and phase correction |
US7190720B2 (en) * | 2001-07-03 | 2007-03-13 | Zenith Electronics Corporation | Tap weight initializer for an adaptive equalizer |
CA2206661C (en) * | 1997-05-29 | 2004-07-20 | Telecommunications Research Laboratories | A duplex decision feedback equalization system |
US6868157B1 (en) | 1997-09-16 | 2005-03-15 | Sanyo Electric Co., Ltd. | Echo canceling method, echo canceller and voice switch |
IT1294878B1 (it) * | 1997-09-19 | 1999-04-23 | Alsthom Cge Alcatel | Metodo per la stabilizzazione del funzionamento di equalizzatori a spaziatura frazionata e relativo sistema di implementazione. |
DE69841213D1 (de) * | 1998-02-26 | 2009-11-19 | Italtel Spa | Folgeschätzung für phasenstetig modulierte Signale |
JP2000032069A (ja) * | 1998-07-08 | 2000-01-28 | Nec Corp | パケット構成方法及びパケット受信器 |
EP1018816A1 (en) * | 1998-10-19 | 2000-07-12 | Lucent Technologies Inc. | Accumulative ARQ method and system |
US6442198B1 (en) | 1998-10-30 | 2002-08-27 | Agere Systems Guardian Corp. | Method and apparatus for stabilizing a decision feedback equalizer |
EP1032170B1 (en) * | 1999-02-23 | 2005-01-12 | Lucent Technologies Inc. | Process and apparatus for receiving signals transmitted over a distorted channel |
US6590932B1 (en) * | 1999-11-24 | 2003-07-08 | Ericsson Inc. | Methods, receiver devices and systems for whitening a signal disturbance in a communication signal |
US6862326B1 (en) | 2001-02-20 | 2005-03-01 | Comsys Communication & Signal Processing Ltd. | Whitening matched filter for use in a communications receiver |
WO2004008705A1 (en) * | 2002-07-17 | 2004-01-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Noise whitening |
US7830956B2 (en) * | 2003-02-05 | 2010-11-09 | Fujitsu Limited | Method and system for processing a sampled signal |
US7257377B2 (en) | 2003-02-18 | 2007-08-14 | Qualcomm, Incorporated | Systems and methods for improving channel estimation |
US7272176B2 (en) * | 2003-02-18 | 2007-09-18 | Qualcomm Incorporated | Communication receiver with an adaptive equalizer |
US20040161057A1 (en) * | 2003-02-18 | 2004-08-19 | Malladi Durga Prasad | Communication receiver with a rake-based adaptive equalizer |
US7711035B2 (en) * | 2004-09-17 | 2010-05-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for suppressing communication signal interference |
US7394608B2 (en) * | 2005-08-26 | 2008-07-01 | International Business Machines Corporation | Read channel apparatus for asynchronous sampling and synchronous equalization |
US7596176B2 (en) * | 2005-10-31 | 2009-09-29 | International Business Machines Corporation | Apparatus, system, and method for adaptive asynchronous equalization using leakage |
US8160189B2 (en) | 2007-01-26 | 2012-04-17 | Raytheon Company | Method and system for communication channel characterization |
US8743946B2 (en) * | 2011-09-08 | 2014-06-03 | Texas Instruments Incorporated | Frequency-domain equalization and combining for single carrier transmission |
US8971447B1 (en) | 2013-10-17 | 2015-03-03 | Fujitsu Limited | Variable delay of data signals |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376308A (en) * | 1981-04-01 | 1983-03-08 | Bell Telephone Laboratories, Incorporated | Control of coefficient drift for fractionally spaced equalizers |
US4550415A (en) * | 1983-11-16 | 1985-10-29 | At&T Bell Laboratories | Fractionally spaced equalization using nyquist-rate coefficient updating |
US4852036A (en) * | 1987-01-07 | 1989-07-25 | Oki Electric Industry Co., Ltd. | Adaptive digital filter and an echo canceler incorporating the same |
US5031195A (en) * | 1989-06-05 | 1991-07-09 | International Business Machines Corporation | Fully adaptive modem receiver using whitening matched filtering |
DE68915762T2 (de) * | 1989-08-21 | 1994-12-08 | Ibm | Taktsteuerung für Modemempfänger. |
US5095497A (en) * | 1989-10-02 | 1992-03-10 | At & T Bell Laboratories | Technique for achieving the full coding gain of encoded digital signals |
US5267266A (en) * | 1992-05-11 | 1993-11-30 | Bell Communications Research, Inc. | Fast converging adaptive equalizer using pilot adaptive filters |
US5309484A (en) * | 1992-09-01 | 1994-05-03 | Motorola, Inc. | Method and apparatus for asynchronous timing recovery using interpolation filter |
US5481565A (en) * | 1993-10-18 | 1996-01-02 | At&T Corp. | Method and apparatus for channel equalization |
US5414733A (en) * | 1993-12-20 | 1995-05-09 | Adtran | Decision feedback equalizer employing fixed ratio postcursor taps for minimizing noise and intersymbol interference in signals conveyed over high speed data service loop |
-
1995
- 1995-02-24 IT ITMI950355A patent/IT1273963B/it active IP Right Grant
-
1996
- 1996-01-18 US US08/588,348 patent/US5751768A/en not_active Expired - Lifetime
- 1996-02-14 NO NO960575A patent/NO960575L/no not_active Application Discontinuation
- 1996-02-15 CN CN96102028A patent/CN1078983C/zh not_active Expired - Fee Related
- 1996-02-22 BR BR9600786A patent/BR9600786A/pt active Search and Examination
- 1996-02-23 DE DE69625397T patent/DE69625397T2/de not_active Expired - Lifetime
- 1996-02-23 CA CA002170195A patent/CA2170195A1/en not_active Abandoned
- 1996-02-23 EP EP96102710A patent/EP0729254B1/en not_active Expired - Lifetime
- 1996-02-26 JP JP8038483A patent/JPH08321795A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH08321795A (ja) | 1996-12-03 |
US5751768A (en) | 1998-05-12 |
EP0729254B1 (en) | 2002-12-18 |
BR9600786A (pt) | 1997-12-23 |
CN1078983C (zh) | 2002-02-06 |
DE69625397D1 (de) | 2003-01-30 |
ITMI950355A1 (it) | 1996-08-24 |
EP0729254A2 (en) | 1996-08-28 |
CA2170195A1 (en) | 1996-08-25 |
ITMI950355A0 (it) | 1995-02-24 |
DE69625397T2 (de) | 2003-10-09 |
IT1273963B (it) | 1997-07-11 |
EP0729254A3 (en) | 2000-07-05 |
NO960575D0 (no) | 1996-02-14 |
CN1138251A (zh) | 1996-12-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FC2A | Withdrawal, rejection or dismissal of laid open patent application |