KR100761819B1 - 직교 진폭 변조 (qam) 신호를 처리하기 위한 장치 및 방법 - Google Patents
직교 진폭 변조 (qam) 신호를 처리하기 위한 장치 및 방법 Download PDFInfo
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- KR100761819B1 KR100761819B1 KR1019997012266A KR19997012266A KR100761819B1 KR 100761819 B1 KR100761819 B1 KR 100761819B1 KR 1019997012266 A KR1019997012266 A KR 1019997012266A KR 19997012266 A KR19997012266 A KR 19997012266A KR 100761819 B1 KR100761819 B1 KR 100761819B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
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- 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
- H04L27/3488—Multiresolution systems
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- 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
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Artificial Intelligence (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Error Detection And Correction (AREA)
Abstract
Description
상술한 바와 같이, 본 발명은 높은 차수의 심볼 콘스텔레이션으로 QAM 신호를 디코딩하기 위한 방법 및 장치에 이용된다.
Claims (15)
- 직교 진폭 변조(QAM: Quadrature Amplitude Modulation) 콘스텔레이션(constellation)으로 표현된 페이저 점(phasor point)을 보유하는 QAM 방식으로 변조된 비트스트림을 수신하는 수신기로서, 상기 수신기(130)는:디코딩된 비트스트림을 생성하기 위해서, 상기 QAM 방식으로 변조된 비트스트림의 제 1 계층 레벨을 직교 위상 편이 변조(QPSK) 콘스텔레이션에 대하여 디코딩하기 위한 제 1 디코더(146)로서, QAM 콘스텔레이션 서브세트 영역을 한정하는 제 1 디코더(146)와,상기 제 1 디코더에 연결되어 있는 제 2 디코더(170)로서, 상기 제 1 디코더에 의해 한정된 상기 QAM 콘스텔레이션의 서브세트 영역 내에서 상기 QAM 방식으로 변조된 비트스트림의 제 2 계층 레벨을 QPSK 콘스텔레이션에 대하여 디코딩하기 위한 제 2 디코더(170)를 포함하고,상기 수신기(130)는 상기 제 1 디코더(146) 및 상기 제 2 디코더(170)를 통하여 상기 수신된 비트스트림을 순차적으로 디코딩하며, 상기 제 1 디코더(146)와 상기 제 2 디코더(170)는 콘볼루션 디코더(convolutional decoders)인,QAM 방식으로 변조된 비트스트림을 수신하는 수신기.
- 제 1항에 있어서, 상기 제 2 디코더에 연결되어 있고 지연을 적용하기 위한 지연부(150), 및 상기 제 1 디코더에 연결되어 있고 상기 제 1 디코더에 의해 한정된 상기 서브세트 영역에 관한 정보를 생성하기 위한 리인코더(reencoder)(160)를 더 포함하는, QAM 방식으로 변조된 비트스트림을 수신하는 수신기.
- 제 2항에 있어서, 상기 지연부, 상기 리인코더 및 상기 제 2 디코더는 디코딩 스테이지를 형성하고, 여기에 상기 QAM 방식으로 변조된 비트스트림의 더 세밀한 콘스텔레이션을 디코딩하기 위해 부가적인 디코딩 스테이지가 추가되는, QAM 방식으로 변조된 비트스트림을 수신하는 수신기.
- 제 1항에 있어서, 상기 제 1 디코더에 연결되어 있고, 상기 제 1 디코더로부터의 상기 디코딩된 비트스트림을 디코딩하기 위한 제 3 외장 디코더(148)를 더 포함하는, QAM 방식으로 변조된 비트스트림을 수신하는 수신기.
- 직교 위상 편이 변조(QPSK) 콘스텔레이션의 "n"개의 계층 레벨을 갖는 QAM 콘스텔레이션 도표에 의해 표현된 복수의 QAM 페이저 점을 구비한 직교 진폭 변조(QAM) 신호를 디코딩하는 방법으로서,(a) 제 1 디코더(146)를 사용하여 상기 QAM 신호의 제 1 계층 레벨을 QPSK 콘스텔레이션에 대하여 디코딩함으로써 디코딩된 신호를 생성하는 단계로서, 상기 제 1 디코더(146)는 QAM 콘스텔레이션의 서브세트 영역을 한정하는, 디코딩된 신호 생성 단계와,(b) 제 2 디코더(170)를 사용하여 상기 제 1 디코더에 의해 한정된 상기 QAM 콘스텔레이션의 서브세트 영역 내에서 상기 QAM 신호의 제 2 계층 레벨을 QPSK 콘스텔레이션에 대하여 디코딩하는 단계를 포함하며,상기 비트스트림은 상기 제 1 디코더(146) 및 상기 제 2 디코더(170)를 통하여 순차적으로 디코딩되며, 상기 제 1 디코더(146) 및 상기 제 2 디코더(170)는 콘볼루션 디코더이며, 추가적인 디코더가 상기 QAM 신호의 부가적인 계층 레벨을 QPSK 콘스텔레이션에 대하여 디코딩하는데 사용되는,QAM 신호 디코딩 방법.
- 삭제
- 삭제
- 제 5항에 있어서, 상기 콘볼루션 디코더는 비터비 디코더(Viterbi decoder)인, QAM 신호 디코딩 방법.
- 제 5항에 있어서, a1) 상기 QAM 신호를 지연부(150)에 인가하는 단계와, a2) 상기 제 1 디코더에 의해 한정된 상기 서브세트 영역에 관한 정보를 생성하기 위해 상기 제 1 디코더로부터의 상기 디코딩된 신호를 인코딩하는 단계를 더 포함하는, QAM 신호 디코딩 방법.
- 제 5항에 있어서, c) 제 3 디코더(148)를 사용하여 상기 제 1 디코더로부터의 상기 디코딩된 신호를 디코딩하는 단계를 더 포함하는, QAM 신호 디코딩 방법.
- 제 10항에 있어서, 상기 제 3 디코더는 블록 디코더(block decoder)인, QAM 신호 디코딩 방법.
- 제 11항에 있어서, 상기 블록 디코더는 리드-솔로몬 디코더(Reed-Solomon decoder)인, QAM 신호 디코딩 방법.
- 위성 신호 수신기에서, 직교 위상 편이 변조(QPSK) 콘스텔레이션의 N개의 계층 레벨을 갖는 QAM 콘스텔레이션 도표에 의해 표현된 복수의 QAM 심볼점을 구비한 직교 진폭 변조(QAM) 신호를 디코딩하는 방법으로서,위성 송신 채널(120)로부터 수신된 입력 QAM 신호를 복조하여, 복조된 QAM 신호를 생성하는 단계(142)와,복수의 디코더를 사용하여 상기 복조된 QAM 신호의 각 계층 레벨을 연속적으로 디코딩하는 단계를 포함하며,상기 복조된 QAM 신호의 각 계층 레벨을 연속적으로 디코딩하는 상기 단계는 QPSK 콘스텔레이션에 대하여 수행되며, 상기 디코더는 비터비 디코더인,QAM 신호 디코딩 방법.
- 삭제
- 삭제
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/884,947 US5966412A (en) | 1997-06-30 | 1997-06-30 | Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal |
US08/884,947 | 1997-06-30 | ||
PCT/US1998/012641 WO1999000957A1 (en) | 1997-06-30 | 1998-06-17 | Apparatus and method for processing a quadrature amplitude modulated (qam) signal |
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KR20010014191A KR20010014191A (ko) | 2001-02-26 |
KR100761819B1 true KR100761819B1 (ko) | 2007-09-28 |
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KR1019997012266A KR100761819B1 (ko) | 1997-06-30 | 1998-06-17 | 직교 진폭 변조 (qam) 신호를 처리하기 위한 장치 및 방법 |
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US (1) | US5966412A (ko) |
EP (1) | EP0988738B1 (ko) |
JP (1) | JP4097712B2 (ko) |
KR (1) | KR100761819B1 (ko) |
CN (1) | CN1118170C (ko) |
AU (1) | AU7975098A (ko) |
BR (1) | BR9810476A (ko) |
DE (1) | DE69840234D1 (ko) |
HK (1) | HK1029466A1 (ko) |
MY (1) | MY127840A (ko) |
WO (1) | WO1999000957A1 (ko) |
Families Citing this family (138)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6125148A (en) * | 1997-08-29 | 2000-09-26 | Telefonaktiebolaget Lm Ericsson | Method for demodulating information in a communication system that supports multiple modulation schemes |
CA2341250C (en) | 1998-07-21 | 2008-04-15 | Tachyon, Inc. | Method and apparatus for multiple access in a communication system |
US6674730B1 (en) | 1998-08-04 | 2004-01-06 | Tachyon, Inc. | Method of and apparatus for time synchronization in a communication system |
US6546557B1 (en) * | 1998-10-13 | 2003-04-08 | General Instrument Corporation | Method and system for enhancing digital video transmission to a set-top box |
US6256483B1 (en) | 1998-10-28 | 2001-07-03 | Tachyon, Inc. | Method and apparatus for calibration of a wireless transmitter |
EP0998087A1 (en) * | 1998-10-30 | 2000-05-03 | Lucent Technologies Inc. | Multilevel transmission system and method with adaptive mapping |
EP0998045A1 (en) * | 1998-10-30 | 2000-05-03 | Lucent Technologies Inc. | Digital transmission system and method |
US6243560B1 (en) * | 1998-10-30 | 2001-06-05 | Trw Inc. | Latency reduction in satellite communication systems |
US6614861B1 (en) * | 1999-04-16 | 2003-09-02 | Nokia Networks Oy | Method and apparatus for higher dimensional modulation |
US6278685B1 (en) | 1999-08-19 | 2001-08-21 | Intellon Corporation | Robust transmission mode |
US6982969B1 (en) | 1999-09-28 | 2006-01-03 | Tachyon, Inc. | Method and system for frequency spectrum resource allocation |
US6218896B1 (en) | 1999-08-27 | 2001-04-17 | Tachyon, Inc. | Vectored demodulation and frequency estimation apparatus and method |
US6735188B1 (en) | 1999-08-27 | 2004-05-11 | Tachyon, Inc. | Channel encoding and decoding method and apparatus |
US6650636B1 (en) | 1999-08-27 | 2003-11-18 | Tachyon, Inc. | Transmission and reception of TCP/IP data over a wireless communication channel |
US6532220B1 (en) | 1999-08-27 | 2003-03-11 | Tachyon, Inc. | System and method for efficient channel assignment |
US6674731B1 (en) | 1999-08-27 | 2004-01-06 | Tachyon, Inc. | Transmission and reception of TCP/IP data over a wireless communication channel |
US6665292B1 (en) | 1999-08-27 | 2003-12-16 | Tachyon, Inc. | Transmission and reception of TCP/IP data over a wireless communication channel |
US6463070B1 (en) | 1999-08-27 | 2002-10-08 | Tachyon, Inc. | System and method for clock correlated data flow in a multi-processor communication system |
DE69923970T2 (de) * | 1999-09-14 | 2006-04-27 | Lucent Technologies Inc. | Kanaldecodiereinrichtung und Verfahren zum Kanaldecodieren |
WO2001039456A1 (en) * | 1999-11-23 | 2001-05-31 | Thomson Licensing S.A. | Gray encoding for hierarchical qam transmission systems |
US7079585B1 (en) | 1999-11-23 | 2006-07-18 | Thomson Licensing | Gray encoding for hierarchical QAM transmission systems |
BR0015739A (pt) * | 1999-11-23 | 2002-07-16 | Thomson Licensing Sa | Codificação de detecção/correção de erro para sistemas de transmissão qam hierárquicos |
US7073116B1 (en) * | 1999-11-23 | 2006-07-04 | Thomson Licensing | Error detection/correction coding for hierarchical QAM transmission systems |
US6442129B1 (en) | 1999-12-06 | 2002-08-27 | Intellon Corporation | Enhanced channel estimation |
US6397368B1 (en) | 1999-12-06 | 2002-05-28 | Intellon Corporation | Forward error correction with channel adaptation |
US6289000B1 (en) | 2000-05-19 | 2001-09-11 | Intellon Corporation | Frame control encoder/decoder for robust OFDM frame transmissions |
KR20020005065A (ko) * | 2000-06-30 | 2002-01-17 | 김지혜 | 위성인터넷 데이터 케이블 연동시스템을 이용한 복합위성-케이블 인터넷 네트워크 |
US7352770B1 (en) | 2000-08-04 | 2008-04-01 | Intellon Corporation | Media access control protocol with priority and contention-free intervals |
US6987770B1 (en) | 2000-08-04 | 2006-01-17 | Intellon Corporation | Frame forwarding in an adaptive network |
US6907044B1 (en) | 2000-08-04 | 2005-06-14 | Intellon Corporation | Method and protocol to support contention-free intervals and QoS in a CSMA network |
US7298691B1 (en) | 2000-08-04 | 2007-11-20 | Intellon Corporation | Method and protocol to adapt each unique connection in a multi-node network to a maximum data rate |
US6909723B1 (en) | 2000-08-04 | 2005-06-21 | Intellon Corporation | Segment bursting with priority pre-emption and reduced latency |
US7469297B1 (en) | 2000-08-04 | 2008-12-23 | Intellon Corporation | Mechanism for using a quasi-addressed response to bind to a message requesting the response |
US6859545B1 (en) * | 2000-08-10 | 2005-02-22 | Chung Shan Institute Of Science And Technology | Information hiding method with reduced fuzziness |
US20020131524A1 (en) * | 2000-11-13 | 2002-09-19 | Victor Demjanenko | System and method using multi-dimensional constellations with low receiver soft- decision extraction requirements |
US6651210B1 (en) * | 2000-12-21 | 2003-11-18 | Arraycomm, Inc. | Flexible multi-bit per symbol rate encoding |
FR2819654B1 (fr) * | 2001-01-15 | 2003-04-11 | Cit Alcatel | Procede pour la transmission et la reception de signaux numeriques modules en phase a quatre etats |
FR2819655A1 (fr) * | 2001-01-15 | 2002-07-19 | Cit Alcatel | Procede pour la transmission et la reception de signaux numeriques modules en phase et en amplitude a seize etats |
US7693179B2 (en) * | 2002-11-29 | 2010-04-06 | Panasonic Corporation | Data transmission apparatus using a constellation rearrangement |
US7471735B2 (en) | 2001-04-27 | 2008-12-30 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US7639759B2 (en) | 2001-04-27 | 2009-12-29 | The Directv Group, Inc. | Carrier to noise ratio estimations from a received signal |
US7209524B2 (en) | 2001-04-27 | 2007-04-24 | The Directv Group, Inc. | Layered modulation for digital signals |
US8005035B2 (en) | 2001-04-27 | 2011-08-23 | The Directv Group, Inc. | Online output multiplexer filter measurement |
US7423987B2 (en) | 2001-04-27 | 2008-09-09 | The Directv Group, Inc. | Feeder link configurations to support layered modulation for digital signals |
US7173981B1 (en) | 2001-04-27 | 2007-02-06 | The Directv Group, Inc. | Dual layer signal processing in a layered modulation digital signal system |
US7778365B2 (en) | 2001-04-27 | 2010-08-17 | The Directv Group, Inc. | Satellite TWTA on-line non-linearity measurement |
US7184473B2 (en) | 2001-04-27 | 2007-02-27 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
WO2004040897A2 (en) | 2001-04-27 | 2004-05-13 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US7483505B2 (en) | 2001-04-27 | 2009-01-27 | The Directv Group, Inc. | Unblind equalizer architecture for digital communication systems |
US7184489B2 (en) | 2001-04-27 | 2007-02-27 | The Directv Group, Inc. | Optimization technique for layered modulation |
US7151807B2 (en) | 2001-04-27 | 2006-12-19 | The Directv Group, Inc. | Fast acquisition of timing and carrier frequency from received signal |
US7583728B2 (en) | 2002-10-25 | 2009-09-01 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
US7245671B1 (en) | 2001-04-27 | 2007-07-17 | The Directv Group, Inc. | Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers |
US7502430B2 (en) | 2001-04-27 | 2009-03-10 | The Directv Group, Inc. | Coherent averaging for measuring traveling wave tube amplifier nonlinearity |
US7822154B2 (en) | 2001-04-27 | 2010-10-26 | The Directv Group, Inc. | Signal, interference and noise power measurement |
US7139334B2 (en) * | 2001-06-21 | 2006-11-21 | Bartlett Alan M | Cooperative code-enhanced multi-user communications system |
US7260159B2 (en) * | 2001-08-22 | 2007-08-21 | The Directv Group, Inc. | Method and apparatus for providing higher order modulation that is backwards compatible with quaternary phase shift keying (QPSK) or offset quaternary phase shift keying (OQPSK) |
KR100441196B1 (ko) * | 2002-01-14 | 2004-07-21 | 기가텔레콤 (주) | 연속 위상 직교 진폭 변조 및 복조 장치 |
US7016657B2 (en) * | 2002-01-30 | 2006-03-21 | Nokia Corporation | Apparatus, and associated method, for communication system utilizing space-generated multilevel coding |
ES2282528T3 (es) * | 2002-02-05 | 2007-10-16 | Hughes Electronics Corporation | Preprocesamiento de las señales superpuestas en un esquema de transmision digital de modulacion estratificada para utilizar receptores legados. |
US7224716B2 (en) * | 2002-02-11 | 2007-05-29 | Hypertag Communications, Inc. | Communication methods and apparatus employing spread spectrum techniques and doppler-tolerant polyphase codes |
US7826466B2 (en) | 2002-06-26 | 2010-11-02 | Atheros Communications, Inc. | Communication buffer scheme optimized for VoIP, QoS and data networking over a power line |
US8149703B2 (en) | 2002-06-26 | 2012-04-03 | Qualcomm Atheros, Inc. | Powerline network bridging congestion control |
US7120847B2 (en) | 2002-06-26 | 2006-10-10 | Intellon Corporation | Powerline network flood control restriction |
WO2004004193A2 (en) | 2002-07-01 | 2004-01-08 | The Directv Group, Inc. | Improving hierarchical 8psk performance |
EP1529347B1 (en) | 2002-07-03 | 2016-08-24 | The Directv Group, Inc. | Method and apparatus for layered modulation |
US7394860B2 (en) * | 2002-10-02 | 2008-07-01 | Nortel Networks Limited | Combined space-time decoding |
JP2004128988A (ja) | 2002-10-03 | 2004-04-22 | Ntt Docomo Inc | 通信システム、受信装置、送信装置及び通信方法 |
EP1554848A4 (en) | 2002-10-21 | 2010-03-03 | Intellon Corp | CONSTRUCTIVE ACCESS INTERVALS IN A CSMA NETWORK |
DE60326483D1 (de) * | 2002-10-25 | 2009-04-16 | Directv Group Inc | Amplituden- und phasenanpassung für den geschichteten modulationsempfang |
US7474710B2 (en) | 2002-10-25 | 2009-01-06 | The Directv Group, Inc. | Amplitude and phase matching for layered modulation reception |
EP1563620B1 (en) | 2002-10-25 | 2012-12-05 | The Directv Group, Inc. | Lower complexity layered modulation signal processor |
US7463676B2 (en) | 2002-10-25 | 2008-12-09 | The Directv Group, Inc. | On-line phase noise measurement for layered modulation |
ATE491296T1 (de) * | 2002-10-25 | 2010-12-15 | Directv Group Inc | Verfahren und vorrichtung zum anpassen von trägerleistungsanforderungen gemäss verfügbarkeit in geschichteten modulationssystemen |
US7230480B2 (en) | 2002-10-25 | 2007-06-12 | The Directv Group, Inc. | Estimating the operating point on a non-linear traveling wave tube amplifier |
EP1559253B1 (en) * | 2002-10-25 | 2012-01-04 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US7529312B2 (en) | 2002-10-25 | 2009-05-05 | The Directv Group, Inc. | Layered modulation for terrestrial ATSC applications |
US20080118003A1 (en) * | 2002-11-13 | 2008-05-22 | Industrial Technology Research Institute | Enhanced Wireless Communication System and Method Thereof |
GB2396786B (en) * | 2002-12-27 | 2005-12-21 | Phyworks Ltd | Fibre optic communications |
JP4603536B2 (ja) * | 2003-05-05 | 2010-12-22 | トムソン ライセンシング | 階層変調システムにおける復調のための装置および方法 |
FR2855001A1 (fr) * | 2003-05-14 | 2004-11-19 | St Microelectronics Sa | Procede de reception de deux signaux de correles transmis sur un unique canal et recepteur pour la mise en oeuvre dudit procede |
BRPI0410373A (pt) * | 2003-05-16 | 2006-06-13 | Thomson Licensing | codificação por repetição em um sistema de comunicação baseado em satélite |
EP1625686A1 (en) * | 2003-05-16 | 2006-02-15 | THOMSON Licensing | A unified receiver for layered and hierarchical modulation systems |
KR100959921B1 (ko) | 2003-07-03 | 2010-05-26 | 삼성전자주식회사 | 다중 채널 통신 시스템의 수신기 및 상기 수신기를 사용한데이터 복원방법 |
US7522679B2 (en) * | 2003-10-01 | 2009-04-21 | Paradyne Corporation | System and method for adapting to a change in constellation density while receiving a signal |
US7502429B2 (en) | 2003-10-10 | 2009-03-10 | The Directv Group, Inc. | Equalization for traveling wave tube amplifier nonlinearity measurements |
US7281187B2 (en) | 2003-11-20 | 2007-10-09 | Intellon Corporation | Using error checking bits to communicated an address or other bits |
US8090857B2 (en) | 2003-11-24 | 2012-01-03 | Qualcomm Atheros, Inc. | Medium access control layer that encapsulates data from a plurality of received data units into a plurality of independently transmittable blocks |
US7215713B2 (en) | 2003-11-26 | 2007-05-08 | Delphi Technologies, Inc. | Method to minimize compatibility error in hierarchical modulation |
US7386056B2 (en) * | 2003-11-26 | 2008-06-10 | Delphi Technologies, Inc. | Method to increase performance of secondary data in a hierarchical modulation scheme |
US7280613B2 (en) * | 2003-11-26 | 2007-10-09 | Delphi Technologies, Inc. | Method to inject hierarchical data onto single carrier stream |
US7230998B2 (en) * | 2003-11-26 | 2007-06-12 | Delphi Technologies, Inc. | Method to increase performance of secondary data in a hierarchical modulation scheme |
US7499696B2 (en) | 2003-11-26 | 2009-03-03 | Delphi Technologies, Inc. | Method to optimize hierarchical modulation for a diversity system |
US7230992B2 (en) * | 2003-11-26 | 2007-06-12 | Delphi Technologies, Inc. | Method to create hierarchical modulation in OFDM |
US20050113040A1 (en) * | 2003-11-26 | 2005-05-26 | Walker Glenn A. | Method to minimize compatibility error in hierarchical modulation using variable phase |
US7813453B2 (en) * | 2004-01-21 | 2010-10-12 | Qualcomm Incorporated | Data detection for a hierarchical coded data transmission |
US7660327B2 (en) | 2004-02-03 | 2010-02-09 | Atheros Communications, Inc. | Temporary priority promotion for network communications in which access to a shared medium depends on a priority level |
EP1716682B1 (en) * | 2004-02-19 | 2008-01-23 | THOMSON Licensing | Method and apparatus for carrier recovery in a communications system |
US7715425B2 (en) | 2004-02-26 | 2010-05-11 | Atheros Communications, Inc. | Channel adaptation synchronized to periodically varying channel |
US7949074B2 (en) * | 2004-04-24 | 2011-05-24 | Thomson Licensing | Apparatus and method for decoding in a hierarchical, modulation system |
US7626991B2 (en) * | 2004-05-10 | 2009-12-01 | Yahoo! Inc. | Clearinghouse for messages between disparate networks |
KR100589680B1 (ko) * | 2004-07-26 | 2006-06-19 | 한국전자통신연구원 | 이동통신 시스템의 신호 전송 방법 및 그 장치와, 수신방법 및 그 장치 |
US8144800B2 (en) * | 2004-09-18 | 2012-03-27 | Broadcom Corporatino | Downstream transmitter and cable modem receiver for 1024 QAM |
EP1803269A1 (en) * | 2004-10-15 | 2007-07-04 | Telefonaktiebolaget L M Ericsson (Publ) | Method and system of radio communicationswith various resolution levels of signal modulation depending on propagation conditions |
US7606596B2 (en) * | 2004-12-01 | 2009-10-20 | Adaptix, Inc. | Exploiting multiuser diversity through phase modulation multiplexing |
DE602006004427D1 (de) * | 2005-01-11 | 2009-02-05 | Qualcomm Inc | Modulation mit mehreren Auflösungen mit variablem Verhältnis der euklidischen Distanz und Blindempfänger |
KR100926020B1 (ko) | 2005-01-11 | 2009-11-11 | 퀄컴 인코포레이티드 | 레이어화된 변조 시스템에서 데이터를 디코딩하는 방법 및장치 |
US7660368B2 (en) | 2005-01-11 | 2010-02-09 | Qualcomm Incorporated | Bit log likelihood ratio evaluation |
US7830983B2 (en) | 2005-03-01 | 2010-11-09 | Delphi Technologies, Inc. | Method to minimize degradation in a D-MPSK hierarchical modulation system |
US7636370B2 (en) | 2005-03-03 | 2009-12-22 | Intellon Corporation | Reserving time periods for communication on power line networks |
US7773697B2 (en) | 2005-03-23 | 2010-08-10 | Delphi Technologies, Inc. | Method to demodulate amplitude offsets in a differential modulation system |
US7725799B2 (en) * | 2005-03-31 | 2010-05-25 | Qualcomm Incorporated | Power savings in hierarchically coded modulation |
US20070009064A1 (en) * | 2005-07-07 | 2007-01-11 | Zhijun Cai | Method and apparatus to facilitate transmission of multiple data streams |
KR101085671B1 (ko) * | 2005-07-19 | 2011-11-22 | 삼성전자주식회사 | 방송 시스템에서의 방송 수신 장치 및 방법 |
US8175190B2 (en) | 2005-07-27 | 2012-05-08 | Qualcomm Atheros, Inc. | Managing spectra of modulated signals in a communication network |
US7822059B2 (en) | 2005-07-27 | 2010-10-26 | Atheros Communications, Inc. | Managing contention-free time allocations in a network |
FI20065866A0 (fi) * | 2006-12-29 | 2006-12-29 | Nokia Corp | Tiedonsiirto matkaviestinjärjestelmässä |
US8005160B2 (en) | 2006-12-30 | 2011-08-23 | Nortel Networks Limited | Processing differentiated hierarchical modulation used in radio frequency communications |
US8116412B1 (en) * | 2006-12-30 | 2012-02-14 | Rockstar Bidco, LP | Modulation division multiple access |
US7986746B2 (en) | 2006-12-30 | 2011-07-26 | Nortel Networks Limited | Content differentiated hierarchical modulation used in radio frequency communications |
EP2159966A1 (en) | 2007-05-10 | 2010-03-03 | Intellon Corporation | Managing distributed access to a shared medium |
US8265175B2 (en) | 2007-06-05 | 2012-09-11 | Constellation Designs, Inc. | Methods and apparatuses for signaling with geometric constellations |
JP5513377B2 (ja) | 2007-06-05 | 2014-06-04 | マジュド エフ. バーソウム | 容量を最適化したコンステレーションで信号を送信する設計方法論及び方法及び装置 |
CN101370160B (zh) * | 2007-08-13 | 2011-12-21 | 电信科学技术研究院 | 一种tfci信息的调制方法及装置 |
US9571326B2 (en) | 2009-03-05 | 2017-02-14 | SeeScan, Inc. | Method and apparatus for high-speed data transfer employing self-synchronizing quadrature amplitude modulation |
KR101570472B1 (ko) * | 2009-03-10 | 2015-11-23 | 삼성전자주식회사 | 연접 부호화 및 복호화 구조를 갖는 데이터 처리 시스템 |
US8675754B1 (en) | 2009-08-19 | 2014-03-18 | Qualcomm Incorporated | Hybrid modulation schemes used in data communication |
US8379769B2 (en) * | 2010-03-10 | 2013-02-19 | Delphi Technologies, Inc. | Communication system utilizing a hierarchically modulated signal and method thereof |
EP2559201B1 (en) | 2010-04-12 | 2020-06-24 | Qualcomm Incorporated | Delayed acknowledgements for low-overhead communication in a network |
US8811509B2 (en) * | 2011-05-25 | 2014-08-19 | Broadcom Corporation | Forward error correction (FEC) m-bit symbol modulation |
US9634878B1 (en) | 2011-09-08 | 2017-04-25 | See Scan, Inc. | Systems and methods for data transfer using self-synchronizing quadrature amplitude modulation (QAM) |
US9065483B2 (en) * | 2013-01-21 | 2015-06-23 | Micron Technology, Inc. | Determining soft data using a classification code |
US8891605B2 (en) | 2013-03-13 | 2014-11-18 | Qualcomm Incorporated | Variable line cycle adaptation for powerline communications |
TWI569589B (zh) * | 2015-05-13 | 2017-02-01 | 晨星半導體股份有限公司 | 維特比解碼裝置及維特比解碼方法 |
CN106301395A (zh) * | 2015-06-10 | 2017-01-04 | 晨星半导体股份有限公司 | 维特比解码装置及维特比解码方法 |
US10097395B2 (en) * | 2016-04-21 | 2018-10-09 | Electronics And Telecommunications Research Institute | Apparatus and method for transmitting and receiving signal based on QAM constellation |
US10312977B2 (en) * | 2017-05-08 | 2019-06-04 | Nxp Usa, Inc. | Complexity reduction for receiver decoding |
US11469854B2 (en) * | 2020-04-06 | 2022-10-11 | Qualcomm Incorporated | Multi-level channel coding for wireless communications |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5363408A (en) * | 1992-03-24 | 1994-11-08 | General Instrument Corporation | Mode selective quadrature amplitude modulation communication system |
PT1035694E (pt) * | 1992-09-25 | 2003-03-31 | Matsushita Electric Ind Co Ltd | Transmissao com multirresolucao em particular com sistemas de portadoras multiplas |
JP2546120B2 (ja) * | 1993-01-05 | 1996-10-23 | 日本電気株式会社 | 誤り訂正連接符号化方式 |
JP3178138B2 (ja) * | 1993-02-05 | 2001-06-18 | 松下電器産業株式会社 | フレーム同期回路及びフレーム同期方法 |
US5386239A (en) * | 1993-05-03 | 1995-01-31 | Thomson Consumer Electronics, Inc. | Multiple QAM digital television signal decoder |
US5396518A (en) * | 1993-05-05 | 1995-03-07 | Gi Corporation | Apparatus and method for communicating digital data using trellis coding with punctured convolutional codes |
GB9313987D0 (en) * | 1993-07-07 | 1993-08-18 | British Broadcasting Corp | Imrpovements in signal transmission systems |
US5511096A (en) * | 1994-01-18 | 1996-04-23 | Gi Corporation | Quadrature amplitude modulated data for standard bandwidth television channel |
US5519734A (en) * | 1994-08-15 | 1996-05-21 | Lsi Logic Corporation | Synchronization arrangement for decoder-de-interleaver |
-
1997
- 1997-06-30 US US08/884,947 patent/US5966412A/en not_active Expired - Lifetime
-
1998
- 1998-06-17 KR KR1019997012266A patent/KR100761819B1/ko not_active IP Right Cessation
- 1998-06-17 JP JP50559899A patent/JP4097712B2/ja not_active Expired - Lifetime
- 1998-06-17 EP EP98930338A patent/EP0988738B1/en not_active Expired - Lifetime
- 1998-06-17 WO PCT/US1998/012641 patent/WO1999000957A1/en not_active Application Discontinuation
- 1998-06-17 DE DE69840234T patent/DE69840234D1/de not_active Expired - Lifetime
- 1998-06-17 BR BR9810476-4A patent/BR9810476A/pt not_active Application Discontinuation
- 1998-06-17 CN CN98806398A patent/CN1118170C/zh not_active Expired - Lifetime
- 1998-06-17 AU AU79750/98A patent/AU7975098A/en not_active Abandoned
- 1998-06-26 MY MYPI98002929A patent/MY127840A/en unknown
-
2000
- 2000-12-29 HK HK00108558A patent/HK1029466A1/xx not_active IP Right Cessation
Non-Patent Citations (3)
Title |
---|
IEEE 1997년 논문 "DVB-T: the COFDM-based system for terrestrial television" |
미국특허공보 05363408호 |
미국특허공보 05467132호(1995.11.14) |
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CN1261491A (zh) | 2000-07-26 |
EP0988738B1 (en) | 2008-11-19 |
EP0988738A1 (en) | 2000-03-29 |
MY127840A (en) | 2006-12-29 |
CN1118170C (zh) | 2003-08-13 |
HK1029466A1 (en) | 2001-03-30 |
JP4097712B2 (ja) | 2008-06-11 |
AU7975098A (en) | 1999-01-19 |
WO1999000957A1 (en) | 1999-01-07 |
US5966412A (en) | 1999-10-12 |
DE69840234D1 (de) | 2009-01-02 |
BR9810476A (pt) | 2000-09-19 |
KR20010014191A (ko) | 2001-02-26 |
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