ES2168272T3 - Metodo y aparato de desmodulacion bidireccional. - Google Patents
Metodo y aparato de desmodulacion bidireccional.Info
- Publication number
- ES2168272T3 ES2168272T3 ES93850197T ES93850197T ES2168272T3 ES 2168272 T3 ES2168272 T3 ES 2168272T3 ES 93850197 T ES93850197 T ES 93850197T ES 93850197 T ES93850197 T ES 93850197T ES 2168272 T3 ES2168272 T3 ES 2168272T3
- Authority
- ES
- Spain
- Prior art keywords
- data symbols
- unknown
- demodulated
- stored
- received
- 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
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
- H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
-
- 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
- H04L25/03178—Arrangements involving sequence estimation techniques
-
- 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
- H04L2025/03535—Variable structures
- H04L2025/03547—Switching between time domain structures
- H04L2025/0356—Switching the time direction of equalisation
Abstract
SE DESCRIBE UN APARATO PARA DEMODULAR SIMBOLOS DE DATOS TRANSMITIDOS A TRAVES DE UN CANAL DE COMUNICACION DE DESVANECIMIENTO DE SEÑAL. SE RECIBEN SECUENCIALMENTE VARIOS PRIMEROS SIMBOLOS DE DATOS PREDETERMINADOS, VARIOS SIMBOLOS DE DATOS DESCONOCIDOS Y VARIOS SEGUNDOS SIMBOLOS DE DATOS PREDETERMINADOS. LAS CANTIDADES RECIBIDAS DE SIMBOLOS DE DATOS SE ALMACENAN, Y SE DETERMINAN RESPECTIVAMENTE UN PRIMER Y SEGUNDO EQUIPO DE SEÑALES DE REFERENCIA A PARTIR DE LAS PRIMERAS Y SEGUNDAS CANTIDADES ALMACENADAS DE SIMBOLOS DE DATOS PREDETERMINADOS. LOS SIMBOLOS DE DATOS DESCONOCIDOS ALMACENADOS BASADOS EN EL PRIMER EQUIPO DE SEÑALES DE REFERENCIA, SE DEMODULAN HACIA DELANTE COMENZANDO POR LOS SIMBOLOS DESCONOCIDOS RECIBIDOS MAS CERCA DE LOS PRIMEROS SIMBOLOS DE DATOS. LOS SIMBOLOS DESCONOCIDOS BASADOS EN EL SEGUNDO EQUIPO DE SEÑALES DE REFERENCIA SE DEMODULAN HACIA ATRAS COMENZANDO POR LOS SIMBOLOS DE DATOS DESCONOCIDOS RECIBIDOS MAS CERCA DE LOS SEGUNDOS SIMBOLOS DE DATOS. SE DETERMINAN, SE COMPARANY SE SELECCIONAN BASANDOSE EN LA COMPARACION LOS VALORES DE CALIDAD INDICATIVOS DE LAS CALIDADES DE LOS SIMBOLOS DE DATOS DEMODULADOS HACIA DELANTE Y HACIA ATRAS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/965,848 US5335250A (en) | 1992-10-22 | 1992-10-22 | Method and apparatus for bidirectional demodulation of digitally modulated signals |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2168272T3 true ES2168272T3 (es) | 2002-06-16 |
Family
ID=25510587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES93850197T Expired - Lifetime ES2168272T3 (es) | 1992-10-22 | 1993-10-19 | Metodo y aparato de desmodulacion bidireccional. |
Country Status (13)
Country | Link |
---|---|
US (1) | US5335250A (es) |
EP (1) | EP0594551B1 (es) |
CN (1) | CN1070667C (es) |
AT (1) | ATE213372T1 (es) |
AU (1) | AU5446394A (es) |
DE (1) | DE69331571T2 (es) |
DK (1) | DK0594551T3 (es) |
ES (1) | ES2168272T3 (es) |
MY (1) | MY110069A (es) |
PH (1) | PH31516A (es) |
SG (1) | SG43305A1 (es) |
TW (1) | TW266364B (es) |
WO (1) | WO1994009582A1 (es) |
Families Citing this family (65)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5577068A (en) * | 1992-06-08 | 1996-11-19 | Ericsson Ge Mobile Communications Inc. | Generalized direct update viterbi equalizer |
US5841816A (en) * | 1992-10-22 | 1998-11-24 | Ericsson Inc. | Diversity Pi/4-DQPSK demodulation |
KR0144837B1 (ko) * | 1993-03-26 | 1998-08-17 | 김광호 | 최적의 복호경로를 갖는 복호화방법 및 그 장치 |
US5400362A (en) * | 1993-03-29 | 1995-03-21 | General Electric Company | Double sided slot traversing decoding for time division multiple access (TDMA) radio systems |
US5513215A (en) * | 1993-09-20 | 1996-04-30 | Glenayre Electronics, Inc. | High speed simulcast data system using adaptive compensation |
US5937015A (en) * | 1994-01-11 | 1999-08-10 | Dent; Paul W. | Interference mitigation by joint decoding of overlapped signals |
US5673291A (en) * | 1994-09-14 | 1997-09-30 | Ericsson Inc. | Simultaneous demodulation and decoding of a digitally modulated radio signal using known symbols |
FR2720208B1 (fr) * | 1994-05-20 | 1996-06-21 | Alcatel Mobile Comm France | Dispositif de prise de décision par estimation de l'algorithme de Viterbi dans un système de radiocommunication. |
DE4431237A1 (de) * | 1994-09-02 | 1996-03-07 | Bosch Gmbh Robert | Verfahren zur Gewinnung von bitspezifischen Zuverlässigkeitsinformationen |
WO1996008925A1 (en) * | 1994-09-12 | 1996-03-21 | Scientific-Atlanta, Inc. | Cable television apparatus employing two-way communication |
US5568518A (en) * | 1994-09-14 | 1996-10-22 | Ericsson Ge Mobile Communications Inc. | Fast automatic gain control |
US5557645A (en) * | 1994-09-14 | 1996-09-17 | Ericsson-Ge Mobile Communications Inc. | Channel-independent equalizer device |
SE9403109D0 (sv) * | 1994-09-16 | 1994-09-16 | Limt Technology Ab | Local insertion of digital material in analogue and digital broadcasting |
CN1092876C (zh) * | 1994-12-12 | 2002-10-16 | 艾利森公司 | 移动通信系统中的定向分集信道分配 |
US5802112A (en) * | 1996-01-16 | 1998-09-01 | Transcendat Inc. | Multi-level, multi-frequency interference pattern analog waveform encoding of digital data for transmission |
US5764646A (en) * | 1996-04-02 | 1998-06-09 | Ericsson Inc. | Packet data transmission with clash subtraction |
KR100189906B1 (ko) * | 1996-04-17 | 1999-06-01 | 윤종용 | 비터비 복호화방법 및 그 회로 |
US6185259B1 (en) | 1996-06-12 | 2001-02-06 | Ericsson Inc. | Transmitter/receiver for GMSK and offset-QAM |
KR100223735B1 (ko) * | 1996-06-29 | 1999-10-15 | 김영환 | 비터비 복호 신호의 동기/비동기 판단 방법 및 장치 |
CA2180924C (en) * | 1996-07-10 | 2003-04-08 | Adnan Abu-Dayya | Diversity path co-channel interference reduction |
FR2751815B1 (fr) * | 1996-07-24 | 1998-10-02 | Matra Communication | Procede de demodulation numerique d'un segment de signal |
FR2751811B1 (fr) * | 1996-07-24 | 1998-10-09 | Matra Communication | Procede de demodulation numerique |
US5909465A (en) * | 1996-12-05 | 1999-06-01 | Ericsson Inc. | Method and apparatus for bidirectional demodulation of digitally modulated signals |
IL120898A (en) | 1997-05-22 | 2000-02-17 | D S P C Israel Ltd | Bi-directional channel analysis |
US6215762B1 (en) | 1997-07-22 | 2001-04-10 | Ericsson Inc. | Communication system and method with orthogonal block encoding |
SE512008C2 (sv) * | 1997-09-19 | 2000-01-10 | Ericsson Telefon Ab L M | Förfarande och arrangemang för demodulering av datasymboler |
US6084926A (en) * | 1997-12-08 | 2000-07-04 | Ericsson Inc. | Method and system for demodulating radio signals |
US6282181B1 (en) | 1998-04-24 | 2001-08-28 | Ericsson Inc | Pseudorandom number sequence generation in radiocommunication systems |
WO1999060737A1 (en) * | 1998-05-15 | 1999-11-25 | Ericsson, Inc. | Signal decoding with or without second synchronization word in a mobile communication system |
US6205183B1 (en) | 1998-05-29 | 2001-03-20 | Ericsson Inc. | Methods of suppressing reference oscillator harmonic interference and related receivers |
US6038262A (en) * | 1998-06-09 | 2000-03-14 | Transcendata, Inc. | Method and apparatus for compensation of electro-magnetic distortion using weighted feedback delay for amplitude coded sinusoidal waveform generation and transmission |
US6567475B1 (en) | 1998-12-29 | 2003-05-20 | Ericsson Inc. | Method and system for the transmission, reception and processing of 4-level and 8-level signaling symbols |
US6507602B1 (en) | 1999-01-07 | 2003-01-14 | Ericsson, Inc. | Smoothing receiver channel estimates using spectral estimation |
US7783299B2 (en) | 1999-01-08 | 2010-08-24 | Trueposition, Inc. | Advanced triggers for location-based service applications in a wireless location system |
US6347125B1 (en) | 1999-01-11 | 2002-02-12 | Ericsson Inc. | Reduced complexity demodulator for multi-bit symbols |
US6556634B1 (en) | 1999-02-10 | 2003-04-29 | Ericsson, Inc. | Maximum likelihood rake receiver for use in a code division, multiple access wireless communication system |
US6490261B1 (en) | 1999-10-28 | 2002-12-03 | Ericsson Inc. | Overlapping slot transmission using phased arrays |
US6754503B1 (en) * | 2000-10-02 | 2004-06-22 | Koninklijke Philips Electronics | Method for adaptively selecting a soft symbol for a subsequent operation a communication device |
US6484285B1 (en) | 2000-02-07 | 2002-11-19 | Ericsson, Inc. | Tailbiting decoder and method |
US6625236B1 (en) | 2000-02-08 | 2003-09-23 | Ericsson Inc. | Methods and systems for decoding symbols by combining matched-filtered samples with hard symbol decisions |
JP3776283B2 (ja) * | 2000-03-17 | 2006-05-17 | 三菱電機株式会社 | 復調器、受信機、および通信システム |
DE10032237A1 (de) * | 2000-07-03 | 2002-01-17 | Infineon Technologies Ag | Viterbi-Entzerrung mittels vorausberechneter Metrikinkremente |
US7443826B1 (en) | 2000-10-04 | 2008-10-28 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for automatic frequency control in a CDMA receiver |
US7006563B2 (en) * | 2001-02-01 | 2006-02-28 | Broadcom Corporation | Decision feedback equalizer for minimum and maximum phase channels |
US7151796B2 (en) * | 2001-02-01 | 2006-12-19 | Broadcom Corporation | High performance equalizer with enhanced DFE having reduced complexity |
US6763493B2 (en) * | 2001-09-21 | 2004-07-13 | The Directv Group, Inc. | Method and system for performing decoding using a reduced-memory implementation |
US7035359B2 (en) * | 2001-10-11 | 2006-04-25 | Telefonaktiebolaget L.M. Ericsson | Methods and apparatus for demodulation of a signal in a signal slot subject to a discontinuous interference signal |
US7460605B2 (en) * | 2001-11-15 | 2008-12-02 | Lawrence Livermore National Security, Llc | Time reversal communication system |
DE10213872A1 (de) * | 2002-03-27 | 2003-10-16 | Siemens Ag | Verfahren zur verbesserten Datenübertragung in einem Übertragungssystem mit kombinierten Übertragungsformaten sowie zugehöriger Rahmenaufbau |
US7463690B2 (en) * | 2002-11-06 | 2008-12-09 | Lawrence Livermore National Security, Llc | Multi-channel time-reversal receivers for multi and 1-bit implementations |
US7187736B2 (en) * | 2003-02-13 | 2007-03-06 | Motorola Inc. | Reducing interference in a GSM communication system |
EP1513308B1 (en) | 2003-09-05 | 2007-01-03 | Agence Spatiale Europeenne | Process for pilot-aided carrier phase synchronization |
US7447971B2 (en) * | 2004-05-14 | 2008-11-04 | Hewlett-Packard Development Company, L.P. | Data recovery systems and methods |
EP1804398B1 (en) * | 2004-11-05 | 2012-08-15 | Panasonic Corporation | Mobile communication terminal apparatus, control method thereof, communication system, and loaming method thereof |
US8437431B1 (en) * | 2007-09-20 | 2013-05-07 | Gregory Hubert Piesinger | Sequential decoder fast incorrect path elimination method and apparatus for pseudo-orthogonal coding |
US8213957B2 (en) | 2009-04-22 | 2012-07-03 | Trueposition, Inc. | Network autonomous wireless location system |
CN102158445A (zh) * | 2011-04-29 | 2011-08-17 | 重庆金美通信有限责任公司 | Cpm调制多符号检测 |
CN103378921B (zh) * | 2012-04-17 | 2016-08-03 | 华为技术有限公司 | 信号解调方法和装置 |
BR112014026611A2 (pt) | 2012-05-01 | 2018-05-15 | Lisnr, Llc | método de distribuição e gerenciamento de conteúdo |
US11452153B2 (en) | 2012-05-01 | 2022-09-20 | Lisnr, Inc. | Pairing and gateway connection using sonic tones |
KR102151813B1 (ko) | 2013-06-26 | 2020-09-03 | 삼성전자주식회사 | 통신 시스템에서의 안정적 신호 복조 방법 및 장치 |
CN107005256B (zh) | 2014-10-15 | 2021-02-09 | 灵思耳有限公司 | 听不见的信令声调 |
US11233582B2 (en) * | 2016-03-25 | 2022-01-25 | Lisnr, Inc. | Local tone generation |
US11189295B2 (en) | 2017-09-28 | 2021-11-30 | Lisnr, Inc. | High bandwidth sonic tone generation |
US11107494B1 (en) | 2019-12-17 | 2021-08-31 | Western Digital Technologies, Inc. | Data storage device accessing magnetic tape by actuating head in two dimensions |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3744075A1 (de) * | 1987-12-24 | 1989-07-13 | Licentia Gmbh | Verfahren zur entzerrung von dispersiven, linearen oder naeherungsweise linearen kanaelen zur uebertragung von digitalen signalen sowie anordnung zum ausfuehren des verfahrens |
DE68909421T2 (de) * | 1988-01-08 | 1994-04-07 | Philips Nv | Verfahren und Vorrichtung zur Signalentzerrung mit einem Rückkoppelentzerrer. |
DE3926277A1 (de) * | 1989-08-09 | 1991-02-14 | Philips Patentverwaltung | Empfaenger fuer zeitvariant verzerrte datensignale |
SE464902B (sv) * | 1989-10-24 | 1991-06-24 | Ericsson Telefon Ab L M | Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet |
DE4001592A1 (de) * | 1989-10-25 | 1991-05-02 | Philips Patentverwaltung | Empfaenger fuer digitales uebertragungssystem |
SE465245B (sv) * | 1989-12-22 | 1991-08-12 | Ericsson Telefon Ab L M | Foerfarande att utfoera kanalestimering foer en faedande kanal vid oeverfoering av symbolsekvenser |
JPH0421207A (ja) * | 1990-05-16 | 1992-01-24 | Oki Electric Ind Co Ltd | 適応等化器 |
GB2247812B (en) * | 1990-09-06 | 1994-08-31 | Motorola Inc | Equalizer for linear modulated signal |
US5182749A (en) * | 1990-12-21 | 1993-01-26 | Motorola, Inc. | Receiver for recovering data in a forward and reverse direction in time |
US5263026A (en) * | 1991-06-27 | 1993-11-16 | Hughes Aircraft Company | Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver |
-
1992
- 1992-10-22 US US07/965,848 patent/US5335250A/en not_active Expired - Lifetime
-
1993
- 1993-10-16 TW TW082108583A patent/TW266364B/zh not_active IP Right Cessation
- 1993-10-19 SG SG1996007850A patent/SG43305A1/en unknown
- 1993-10-19 DK DK93850197T patent/DK0594551T3/da active
- 1993-10-19 EP EP93850197A patent/EP0594551B1/en not_active Expired - Lifetime
- 1993-10-19 ES ES93850197T patent/ES2168272T3/es not_active Expired - Lifetime
- 1993-10-19 AT AT93850197T patent/ATE213372T1/de not_active IP Right Cessation
- 1993-10-19 DE DE69331571T patent/DE69331571T2/de not_active Expired - Lifetime
- 1993-10-20 PH PH47111A patent/PH31516A/en unknown
- 1993-10-20 MY MYPI93002168A patent/MY110069A/en unknown
- 1993-10-21 WO PCT/US1993/010087 patent/WO1994009582A1/en unknown
- 1993-10-21 CN CN93120392A patent/CN1070667C/zh not_active Expired - Lifetime
- 1993-10-21 AU AU54463/94A patent/AU5446394A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
TW266364B (es) | 1995-12-21 |
DE69331571D1 (de) | 2002-03-21 |
ATE213372T1 (de) | 2002-02-15 |
WO1994009582A1 (en) | 1994-04-28 |
DK0594551T3 (da) | 2002-03-11 |
EP0594551A1 (en) | 1994-04-27 |
CN1100579A (zh) | 1995-03-22 |
DE69331571T2 (de) | 2002-09-26 |
PH31516A (en) | 1998-11-03 |
EP0594551B1 (en) | 2002-02-13 |
MY110069A (en) | 1997-12-31 |
CN1070667C (zh) | 2001-09-05 |
SG43305A1 (en) | 1997-10-17 |
US5335250A (en) | 1994-08-02 |
AU5446394A (en) | 1994-05-09 |
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FG2A | Definitive protection |
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