ES2164654T3 - Modem que incluye un ecualizador de la fluctuacion de la amplitud. - Google Patents
Modem que incluye un ecualizador de la fluctuacion de la amplitud.Info
- Publication number
- ES2164654T3 ES2164654T3 ES93903400T ES93903400T ES2164654T3 ES 2164654 T3 ES2164654 T3 ES 2164654T3 ES 93903400 T ES93903400 T ES 93903400T ES 93903400 T ES93903400 T ES 93903400T ES 2164654 T3 ES2164654 T3 ES 2164654T3
- Authority
- ES
- Spain
- Prior art keywords
- modem
- fluctuation
- amplitude
- symbol
- equalizer
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
- H04L27/3872—Compensation for phase rotation in the demodulated signal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
UN MODEM (100) INCLUYE UN ECUALIZADOR PARA ECUALIZAR LA DISTORSION DE LA FLUCTUACION DE AMPLITUD DE UNA SEÑAL RECIBIDA (10). LA SEÑAL RECIBIDA INCLUYE SIMBOLOS MODULADOS BASADOS EN UNA CONSTELACION PREDETERMINADA DE PUNTOS, REPRESENTANDO CADA PUNTO UN SIMBOLO. EL MODEM EXTRAE PRIMERO UN SIMBOLO MODULADO PARA PROPORCIONAR UN SIMBOLO EXTRAIDO, R (K), QUE INCLUYE UNA DISTORSION DE FLUCTUACION DE AMPLITUD. DESPUES EL MODEM IDENTIFICA UN PUNTO DE SEÑAL PN (K) DE LA CONSTELACION PREDETERMINADA CORRESPONDIENTE AL SIMBOLO EXTRAIDO. ADEMAS, EL MODEM DETERMINA UNA SEÑAL DE ERROR (76) BASADA EN LA DISTORSION DE LA FLUCTUACION DE LA AMPLITUD, Y DESPUES EMPLEA LA SEÑAL DE ERROR PARA COMPENSAR LA DISTORSION DE FLUCTUACION DE AMPLITUD DE LOS SIMBOLOS EXTRAIDOS POSTERIORMENTE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82778392A | 1992-01-29 | 1992-01-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2164654T3 true ES2164654T3 (es) | 2002-03-01 |
Family
ID=25250156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES93903400T Expired - Lifetime ES2164654T3 (es) | 1992-01-29 | 1993-01-04 | Modem que incluye un ecualizador de la fluctuacion de la amplitud. |
Country Status (10)
Country | Link |
---|---|
US (1) | US5434884A (es) |
EP (1) | EP0624287B1 (es) |
JP (1) | JPH07504072A (es) |
CN (1) | CN1032103C (es) |
BR (1) | BR9305798A (es) |
CA (1) | CA2128609C (es) |
DE (1) | DE69330874T2 (es) |
ES (1) | ES2164654T3 (es) |
SI (1) | SI9300043A (es) |
WO (1) | WO1993015552A1 (es) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2121934A1 (en) * | 1993-06-14 | 1994-12-15 | Gordon Bremer | Simultaneous analog and digital communication with improved phase immunity |
US5970103A (en) | 1996-09-06 | 1999-10-19 | Townshend; Brent | High speed communications system for analog subscriber connections |
CA2266945C (en) * | 1994-12-09 | 2002-04-02 | Brent Townshend | High speed encoder and encoding method |
JP3351642B2 (ja) * | 1994-12-20 | 2002-12-03 | 富士通株式会社 | 位相ジッタ抽出回路及び位相ジッタキャンセル回路 |
US5751766A (en) * | 1995-04-27 | 1998-05-12 | Applied Signal Technology, Inc. | Non-invasive digital communications test system |
US6233274B1 (en) | 1995-04-27 | 2001-05-15 | Wavetek Wandel Goltermann | Non-invasive digital cable test system |
JP3568284B2 (ja) * | 1995-08-22 | 2004-09-22 | 松下電器産業株式会社 | 復調方法および復調装置 |
US6137831A (en) * | 1997-06-20 | 2000-10-24 | Johnson; Neldon P. | Method and apparatus for reducing receiver imposed distortion |
US6133783A (en) * | 1997-07-07 | 2000-10-17 | Samsung Electronics Co., Inc. | Phase jitter canceller |
US6097767A (en) * | 1998-04-17 | 2000-08-01 | Advanced Micro Devices, Inc. | Apparatus and method for determining an optimum equalizer setting for a signal equalizer in a communication network receiver |
US6650699B1 (en) * | 1999-01-21 | 2003-11-18 | International Business Machines Corporation | Methods and apparatus for timing recovery from a sampled and equalized data signal |
US6553518B1 (en) | 1999-03-08 | 2003-04-22 | International Business Machines Corporation | Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations |
US6661847B1 (en) | 1999-05-20 | 2003-12-09 | International Business Machines Corporation | Systems methods and computer program products for generating and optimizing signal constellations |
EP1063826A1 (en) * | 1999-06-25 | 2000-12-27 | Sony International (Europe) GmbH | Carrier recovery means in digital quadrature receivers |
US6160443A (en) * | 1999-09-08 | 2000-12-12 | Atmel Corporation | Dual automatic gain control in a QAM demodulator |
US6823017B1 (en) | 1999-10-29 | 2004-11-23 | International Business Machines Corporation | Systems, methods and computer program products for filtering glitches from measured values in a sequence of code points |
US6662322B1 (en) | 1999-10-29 | 2003-12-09 | International Business Machines Corporation | Systems, methods, and computer program products for controlling the error rate in a communication device by adjusting the distance between signal constellation points |
US6765955B1 (en) | 1999-10-29 | 2004-07-20 | International Business Machines Corporation | Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise |
US6816545B1 (en) | 1999-10-29 | 2004-11-09 | International Business Machines Corporation | Systems, methods and computer program products for identifying digital impairments in modems based on clusters and/or skips in pulse code modulation signal levels |
US6650657B1 (en) | 1999-10-29 | 2003-11-18 | International Business Machines Corporation | Systems, methods and computer program products for identifying digital impairments in modem signals |
US6839382B1 (en) | 1999-10-29 | 2005-01-04 | International Business Machines Corporation | System, methods and computer program products for identifying digital impairments in modem signals using signature analysis and signal level comparison analysis |
US6826157B1 (en) | 1999-10-29 | 2004-11-30 | International Business Machines Corporation | Systems, methods, and computer program products for controlling data rate reductions in a communication device by using a plurality of filters to detect short-term bursts of errors and long-term sustainable errors |
US6792004B1 (en) | 1999-10-29 | 2004-09-14 | International Business Machines Corporation | Systems, methods and computer program products for averaging learned levels in the presence of robbed-bit signaling based on proximity |
US6792040B1 (en) | 1999-10-29 | 2004-09-14 | International Business Machines Corporation | Modems having a dual power mode capability and methods of operating same |
US6505222B1 (en) | 1999-10-29 | 2003-01-07 | International Business Machines Corporation | Systems methods and computer program products for controlling undesirable bias in an equalizer |
US6611563B1 (en) | 1999-10-29 | 2003-08-26 | International Business Machines Corporation | Systems, methods and computer program products for data mode refinement of modem constellation points |
US6754258B1 (en) | 1999-10-29 | 2004-06-22 | International Business Machines Corporation | Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns |
US6823004B1 (en) | 1999-10-29 | 2004-11-23 | International Business Machines Corporation | Methods, systems and computer program products for monitoring performance of a modem during a connection |
US6967995B1 (en) | 1999-10-29 | 2005-11-22 | International Business Machines Corporation | Methods, systems and computer program products for carrier drop detection using a variable threshold |
KR100959921B1 (ko) | 2003-07-03 | 2010-05-26 | 삼성전자주식회사 | 다중 채널 통신 시스템의 수신기 및 상기 수신기를 사용한데이터 복원방법 |
US7242712B1 (en) | 2004-03-08 | 2007-07-10 | Pmc-Sierra, Inc. | Decision feedback equalizer (DFE) for jitter reduction |
US8144814B2 (en) | 2006-05-22 | 2012-03-27 | Qualcomm Incorporated | Signal quality estimator |
US7466140B2 (en) * | 2006-12-25 | 2008-12-16 | Advantest Corporation | Signal generation circuit, jitter injection circuit, semiconductor chip and test apparatus |
US8428113B1 (en) | 2009-01-23 | 2013-04-23 | Pmc-Sierra, Inc. | Equalizer for heavily clipped or compressed communications signals |
US8644369B1 (en) | 2009-12-01 | 2014-02-04 | Pmc-Sierra, Inc. | Equalizer adaptation for heavily compressed or clipped communications signals |
US8817860B2 (en) * | 2011-09-09 | 2014-08-26 | Entropic Communications, Inc. | Systems and methods for performing phase tracking within an ADC-based tuner |
US9793879B2 (en) * | 2014-09-17 | 2017-10-17 | Avnera Corporation | Rate convertor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027250A (en) * | 1975-10-21 | 1977-05-31 | Lang Gordon R | Apparatus and method for reducing effects of amplitude and phase jitter |
DE3381073D1 (de) * | 1982-10-04 | 1990-02-08 | Nec Corp | Verfahren zur qualitaetsmessung eines empfangssignals eines empfaengers in einem zweidimensionalen linear modulierten datenuebertragungssystem. |
US4631738A (en) * | 1984-12-06 | 1986-12-23 | Paradyne Corporation | Gain tracker for digital modem |
US4646325A (en) * | 1985-04-15 | 1987-02-24 | Paradyne Corporation | Index decoder for digital modems |
US4689804A (en) * | 1985-08-14 | 1987-08-25 | Racal Data Communications Inc. | Method and apparatus for reduction of sinusoidal phase jitter in a high speed data modem |
EP0366160A1 (en) * | 1986-01-18 | 1990-05-02 | Hewlett-Packard Limited | Non intrusive channel impairment analyser |
US4777640A (en) * | 1986-06-09 | 1988-10-11 | Motorola, Inc. | Frequency adaptive phase jitter canceler |
US4953186A (en) * | 1988-02-19 | 1990-08-28 | Silicon Systems, Inc. | Phase jitter tracker |
-
1993
- 1993-01-04 ES ES93903400T patent/ES2164654T3/es not_active Expired - Lifetime
- 1993-01-04 BR BR9305798A patent/BR9305798A/pt not_active IP Right Cessation
- 1993-01-04 DE DE69330874T patent/DE69330874T2/de not_active Expired - Fee Related
- 1993-01-04 EP EP93903400A patent/EP0624287B1/en not_active Expired - Lifetime
- 1993-01-04 WO PCT/US1993/000098 patent/WO1993015552A1/en active IP Right Grant
- 1993-01-04 JP JP5513238A patent/JPH07504072A/ja active Pending
- 1993-01-04 CA CA002128609A patent/CA2128609C/en not_active Expired - Fee Related
- 1993-01-28 CN CN93100920A patent/CN1032103C/zh not_active Expired - Fee Related
- 1993-01-28 SI SI19939300043A patent/SI9300043A/sl unknown
-
1994
- 1994-10-04 US US08/317,429 patent/US5434884A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69330874D1 (de) | 2001-11-08 |
CN1032103C (zh) | 1996-06-19 |
EP0624287A4 (en) | 1997-07-30 |
SI9300043A (en) | 1993-09-30 |
CN1081550A (zh) | 1994-02-02 |
US5434884A (en) | 1995-07-18 |
BR9305798A (pt) | 1997-02-18 |
CA2128609A1 (en) | 1993-08-05 |
EP0624287A1 (en) | 1994-11-17 |
EP0624287B1 (en) | 2001-10-04 |
JPH07504072A (ja) | 1995-04-27 |
DE69330874T2 (de) | 2002-04-25 |
WO1993015552A1 (en) | 1993-08-05 |
CA2128609C (en) | 1997-11-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES2164654T3 (es) | Modem que incluye un ecualizador de la fluctuacion de la amplitud. | |
AP2000001940A0 (en) | Frame structure and frame synchronization for multicarrier systems. | |
SE8003381L (sv) | Sett att overfora vederupplysningar fran flygplats | |
SE9002559D0 (sv) | Kommunikationslaenk | |
MY126431A (en) | Method and apparatus for generating a linearly modulated signal using polar modulation. | |
SE8007674L (sv) | Utjemningsanordning | |
DE3068202D1 (en) | Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system | |
YU179189A (sh) | Postupak za generisanje predajnog amplitudno modulisanog signala sa nezavisnim bočnim opsegom i uredjaj za sprovodjenje postupka | |
Pitts | Drawing the invisible: Children's conceptualization of God. | |
JPS6426178A (en) | Transmitter-receiver | |
MXPA04004977A (es) | Metodo y aparato para precompensacion de traslape de impulso en senales moduladas digitalmente. | |
DK0523222T3 (da) | Fremgangsmåde og apparat til indlæring af sprog | |
Kinney et al. | The relationship between self-esteem and academic achievement. | |
DK147610C (da) | Fremgangsmaade til seriel datatransmission og videoteksttypedatatransmissionssystem til udoevelse af fremgangsmaaden | |
Pollack | Reflections of a pioneer. | |
Zontek | Admissibility of limits of the unique locally best linear estimators with application to variance components models | |
McLeod et al. | A support group for single-parent graduate students and their children. | |
Neachtain | Competence and minority language broadcasting: A response | |
Wilhelms | Geologic map of lunar ringed impact basins | |
Eichen | Geography and Teaching: New Enviro-Magazines and Classroom Use | |
MacDevitt et al. | Using an information sheet for clients at a university counseling center. | |
Repkina | Developing education in school practice | |
Jayrne | Catholic Education: Present Resources and Challenges of Tomorrow | |
Schuh | Study skills: a handbook for administrators, teachers, parents, and students | |
GB2220807A (en) | Method and system for modulating a carrier signal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
Ref document number: 624287 Country of ref document: ES |