KR20010014191A - 직각 진폭 변조 (qam) 신호를 처리하기 위한 장치 및방법 - Google Patents
직각 진폭 변조 (qam) 신호를 처리하기 위한 장치 및방법 Download PDFInfo
- Publication number
- KR20010014191A KR20010014191A KR19997012266A KR19997012266A KR20010014191A KR 20010014191 A KR20010014191 A KR 20010014191A KR 19997012266 A KR19997012266 A KR 19997012266A KR 19997012266 A KR19997012266 A KR 19997012266A KR 20010014191 A KR20010014191 A KR 20010014191A
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- decoder
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Classifications
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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
-
- 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
Claims (15)
- QAM 성군으로 표시된 페이저 점을 보유하는 직각 진폭 변조(QAM)로 변조된 비트스트림을 수신하는 수신기에 있어서,디코드된 비트스트림을 생성하기 위해서 4위상 편이 변조(QPSK) 성군에 대하여 상기 QAM 변조된 비트스트림을 디코딩하기 위한 제 1 디코더(146), 및상기 제 1 디코더(146)에 연결되어 있고, 상기 제 1 디코더에 의해 한정된 상기 QAM 성군의 서브세트 영역 내의 QPSK 성군에 대하여 QAM 변조된 비트스트림을 디코딩하기 위한 제 2 디코더(170)를 포함하는, 수신기.
- 제 1항에 있어서, 상기 제 2 디코더에 연결되어 있고 지연을 적용하기 위한 지연부, 및 상기 제 1 디코더에 연결되어 있고 상기 제 1 디코더에 의해 한정된 상기 서브세트 영역에 관한 정보를 생성하기 위한 리인코더(reencoder)를 더 포함하는, 수신기.
- 제 2항에 있어서, 상기 지연부, 상기 리인코더 및 상기 제 2 디코더는 디코딩 스테이지를 형성하고, 여기에 상기 QAM 변조된 비트스트림의 더 세밀한 성군을 디코드하기 위해 부가적인 디코딩 스테이지가 추가되는, 수신기.
- 제 1항에 있어서, 상기 제 1 디코더에 연결되어 있고, 상기 제 1 디코더로부터 상기 디코드된 비트스트림을 디코딩하기 위한 제 3 외장 디코더를 더 포함하는, 수신기.
- 4위상 편이 변조(QPSK) 성군의 "n" 개의 계층 레벨을 갖는 QAM 성군 도표에 의해 표시된 다수의 QAM 페이저 점을 구비한 직각 진폭 변조(QAM) 신호를 디코딩하는 방법에 있어서,(a) 디코드된 신호를 생성하기 위해 QPSK 성군에 대하여 상기 QAM 신호의 제 1 계층 레벨을 디코드하기 위해 제 1 디코더를 사용하는 단계, 및(b) 상기 제 1 디코더에 의해 한정된 상기 QAM 성군의 서브세트 영역 내에서, 상기 QPSK 성군에 대하여 상기 QAM 신호의 제 2 계층 레벨을 디코드하기 위해 제 2 디코더를 사용하는 단계를 포함하는, QAM 신호를 디코드하는 방법.
- 제 5항에 있어서, 상기 QAM 신호의 부가적인 계층 레벨을 디코드하기 위해 추가 디코더를 사용하는 단계를 더 포함하는, QAM 신호를 디코드하는 방법.
- 제 2항에 따른 수신기 또는 제 5항에 따른 방법에 있어서, 상기 제 1 및 상기 제 2 디코더는 중첩 디코더(convolutional decoders)인, 수신기 및 방법.
- 제 7항에 있어서, 상기 중첩 디코더는 비터비 디코더(Viterbi decoder)인, 수신기 및 방법.
- 제 5항에 있어서, a1) 상기 QAM 신호를 지연시키는 단계와, a2) 상기 제 1 디코더에 의해 한정된 상기 서브세트 영역에 관한 정보를 생성하기 위해 상기 제 1 디코더로부터 상기 디코드된 신호를 인코딩하는 단계를 포함하는, QAM 신호를 디코딩하는 방법.
- 제 5항에 있어서, c) 상기 제 1 디코더로부터 상기 디코드된 신호를 디코드하기 위해 제 3 디코더를 사용하는 단계를 포함하는, QAM 신호를 디코딩하는 방법.
- 제 4항에 따른 수신기 또는 제 10항에 따른 방법에 있어서, 상기 제 3 디코더는 블록 디코더(block decoder)인, 수신기 및 방법.
- 제 11항에 있어서, 상기 블록 디코더는 리드-솔로몬(Reed-Solomon decoder)인, 수신기 및 방법.
- 위성 신호 수신기에서, 4위상 편이 변조(QPSK) 성군의 N 개의 계층 레벨을 갖는 QAM 성군 도표에 의해 표시된 다수의 QAM 심볼점을 구비한 직각 진폭 변조(QAM) 신호를 디코딩하는 방법에 있어서,복조된 QAM 신호를 생성하기 위해 위성 송신 채널로부터 수신된 입력 QAM 신호를 복조하는 단계, 및각 계층 레벨의 상기 복조된 각 QAM 신호를 연속적으로 디코딩하기 위해 다수의 디코더를 사용하는 단계를 포함하는, QAM 신호를 디코딩하는 방법.
- 제 13항에 있어서, 각각의 계층 레벨을 연속적으로 디코딩하는 상기 단계는 QPSK 성군에 관한 것인, QAM 신호를 디코딩하는 방법.
- 제 13항에 있어서, 상기 디코더는 비터비 디코더인, QAM 신호를 디코딩하는 방법.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/884,947 | 1997-06-30 | ||
US08/884,947 US5966412A (en) | 1997-06-30 | 1997-06-30 | Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal |
PCT/US1998/012641 WO1999000957A1 (en) | 1997-06-30 | 1998-06-17 | Apparatus and method for processing a quadrature amplitude modulated (qam) signal |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20010014191A true KR20010014191A (ko) | 2001-02-26 |
KR100761819B1 KR100761819B1 (ko) | 2007-09-28 |
Family
ID=25385792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019997012266A KR100761819B1 (ko) | 1997-06-30 | 1998-06-17 | 직교 진폭 변조 (qam) 신호를 처리하기 위한 장치 및 방법 |
Country Status (11)
Country | Link |
---|---|
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) |
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1997
- 1997-06-30 US US08/884,947 patent/US5966412A/en not_active Expired - Lifetime
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- 1998-06-17 JP JP50559899A patent/JP4097712B2/ja not_active Expired - Lifetime
- 1998-06-17 KR KR1019997012266A patent/KR100761819B1/ko not_active IP Right Cessation
- 1998-06-17 EP EP98930338A patent/EP0988738B1/en not_active Expired - Lifetime
- 1998-06-17 DE DE69840234T patent/DE69840234D1/de not_active Expired - Lifetime
- 1998-06-17 WO PCT/US1998/012641 patent/WO1999000957A1/en not_active Application Discontinuation
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- 1998-06-17 AU AU79750/98A patent/AU7975098A/en not_active Abandoned
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CN1118170C (zh) | 2003-08-13 |
DE69840234D1 (de) | 2009-01-02 |
AU7975098A (en) | 1999-01-19 |
CN1261491A (zh) | 2000-07-26 |
EP0988738A1 (en) | 2000-03-29 |
BR9810476A (pt) | 2000-09-19 |
JP4097712B2 (ja) | 2008-06-11 |
WO1999000957A1 (en) | 1999-01-07 |
JP2002507358A (ja) | 2002-03-05 |
US5966412A (en) | 1999-10-12 |
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