DE3477718D1 - Adaptive equalizer for digital signals affected by distorsions with time varying characteristics - Google Patents
Adaptive equalizer for digital signals affected by distorsions with time varying characteristicsInfo
- Publication number
- DE3477718D1 DE3477718D1 DE8484109566T DE3477718T DE3477718D1 DE 3477718 D1 DE3477718 D1 DE 3477718D1 DE 8484109566 T DE8484109566 T DE 8484109566T DE 3477718 T DE3477718 T DE 3477718T DE 3477718 D1 DE3477718 D1 DE 3477718D1
- Authority
- DE
- Germany
- Prior art keywords
- distorsions
- digital signals
- time varying
- adaptive equalizer
- varying characteristics
- 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.)
- Expired
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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8367864A IT1212993B (it) | 1983-08-11 | 1983-08-11 | Equalizzatore adattivo per segnali numerici soggetti a distorsioni variabili nel tempo |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3477718D1 true DE3477718D1 (en) | 1989-05-18 |
Family
ID=11305892
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE198484109566T Pending DE137213T1 (de) | 1983-08-11 | 1984-08-10 | Adaptiver entzerrer fuer von zeitvarianten verzerrungen betroffenen digitalen signalen. |
DE8484109566T Expired DE3477718D1 (en) | 1983-08-11 | 1984-08-10 | Adaptive equalizer for digital signals affected by distorsions with time varying characteristics |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE198484109566T Pending DE137213T1 (de) | 1983-08-11 | 1984-08-10 | Adaptiver entzerrer fuer von zeitvarianten verzerrungen betroffenen digitalen signalen. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4580275A (de) |
EP (1) | EP0137213B1 (de) |
JP (1) | JPH0831774B2 (de) |
CA (1) | CA1210083A (de) |
DE (2) | DE137213T1 (de) |
IT (1) | IT1212993B (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8406846D0 (en) * | 1984-03-16 | 1984-04-18 | British Telecomm | Digital filters |
US4835724A (en) * | 1985-09-27 | 1989-05-30 | Cogent Systems, Inc. | Apparatus and method of quantizing a set of weights for a weighted sun signal processing system |
US4807174A (en) * | 1985-09-27 | 1989-02-21 | Cogent Systems, Inc. | Apparatus and method for quantizing a set of weights for a weighted sum signal processing system |
JPS62104324A (ja) * | 1985-10-31 | 1987-05-14 | Toshiba Corp | 適応形自動等化器 |
US4914639A (en) * | 1987-01-02 | 1990-04-03 | Raytheon Company | Sonar doppler system with a digital adaptive filter |
GB8721159D0 (en) * | 1987-09-09 | 1987-10-14 | Philips Nv | Adjusting filter coefficients |
EP0413073A1 (de) * | 1989-08-16 | 1991-02-20 | International Business Machines Corporation | Phasenfilter mit adaptiver Schleifenverstärkung |
CA2047557C (en) * | 1990-07-20 | 1996-12-10 | Mitsuo Kakuishi | Received data adjusting device |
JP3154427B2 (ja) * | 1992-03-16 | 2001-04-09 | キヤノン株式会社 | 等化装置 |
US5307375A (en) * | 1992-11-19 | 1994-04-26 | General Instrument Corporation | Two stage accumulator for use in updating coefficients |
JP2785858B2 (ja) * | 1994-01-28 | 1998-08-13 | 日本電気株式会社 | 高速制御適応フィルタを用いた受信方式 |
JP3396318B2 (ja) * | 1994-12-20 | 2003-04-14 | 富士通株式会社 | 自動等化器 |
JP2830806B2 (ja) * | 1995-11-29 | 1998-12-02 | 日本電気株式会社 | データ再生検出装置 |
DE69630784T2 (de) * | 1996-09-24 | 2004-09-30 | Hewlett-Packard Co. (N.D.Ges.D.Staates Delaware), Palo Alto | Datenverarbeitungsgerät und -verfahren |
US6438162B1 (en) * | 1998-11-23 | 2002-08-20 | Pmc-Sierra Ltd. | Implementation method for adaptive equalizer in CMOS |
US6591282B1 (en) * | 2000-04-05 | 2003-07-08 | Oak Technology, Inc. | Apparatus and method for a DC-Insensitive FIR filter for optical PRML channel |
US7283038B2 (en) | 2005-06-14 | 2007-10-16 | International Business Machines Corporation | Comparing counter contents for timing critical applications |
US20030063664A1 (en) * | 2001-10-02 | 2003-04-03 | Bodenschatz John S. | Adaptive thresholding for adaptive equalization |
US7353245B2 (en) * | 2002-09-04 | 2008-04-01 | Agere Systems Inc. | Adaptive filter coefficient determination |
KR100688510B1 (ko) * | 2004-12-20 | 2007-03-02 | 삼성전자주식회사 | 계수 갱신 회로, 이를 포함하는 적응 등화기, 및 적응등화기의 계수 갱신 방법 |
US9270871B2 (en) * | 2009-04-20 | 2016-02-23 | Dolby Laboratories Licensing Corporation | Optimized filter selection for reference picture processing |
US10785069B2 (en) | 2018-12-07 | 2020-09-22 | Analog Devices International Unlimited Company | Early detection and indication of link loss |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3571733A (en) * | 1968-09-13 | 1971-03-23 | Ibm | Adaptive delay line equalizer for waveforms with correlation between subsequent data bits |
US3633105A (en) * | 1970-04-01 | 1972-01-04 | Gte Automatic Electric Lab Inc | Digital adaptive equalizer system |
US3992616A (en) * | 1975-06-24 | 1976-11-16 | Honeywell Inc. | Receiver equalizer apparatus |
JPS5454559A (en) * | 1977-10-11 | 1979-04-28 | Fujitsu Ltd | Automatic equalizer |
JPS54118807A (en) * | 1978-03-07 | 1979-09-14 | Toshiba Corp | Signal equalizing system |
-
1983
- 1983-08-11 IT IT8367864A patent/IT1212993B/it active
-
1984
- 1984-07-30 CA CA000459950A patent/CA1210083A/en not_active Expired
- 1984-07-31 JP JP59159498A patent/JPH0831774B2/ja not_active Expired - Lifetime
- 1984-08-10 DE DE198484109566T patent/DE137213T1/de active Pending
- 1984-08-10 DE DE8484109566T patent/DE3477718D1/de not_active Expired
- 1984-08-10 EP EP84109566A patent/EP0137213B1/de not_active Expired
- 1984-08-13 US US06/640,513 patent/US4580275A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA1210083A (en) | 1986-08-19 |
IT8367864A0 (it) | 1983-08-11 |
DE137213T1 (de) | 1987-01-15 |
US4580275A (en) | 1986-04-01 |
EP0137213A3 (en) | 1986-09-10 |
EP0137213A2 (de) | 1985-04-17 |
IT1212993B (it) | 1989-12-07 |
JPS6069908A (ja) | 1985-04-20 |
EP0137213B1 (de) | 1989-04-12 |
JPH0831774B2 (ja) | 1996-03-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: TELECOM ITALIA MOBILE S.P.A., TURIN/TORINO, IT |
|
8339 | Ceased/non-payment of the annual fee |