BR9910013A - Processo para transmitir bits de informação, receptor para decodificar sìmbolos de informação desconhecidos intercalados com sìmbolos de informação conhecidos, e, transmissor para transmitir informação - Google Patents

Processo para transmitir bits de informação, receptor para decodificar sìmbolos de informação desconhecidos intercalados com sìmbolos de informação conhecidos, e, transmissor para transmitir informação

Info

Publication number
BR9910013A
BR9910013A BR9910013-4A BR9910013A BR9910013A BR 9910013 A BR9910013 A BR 9910013A BR 9910013 A BR9910013 A BR 9910013A BR 9910013 A BR9910013 A BR 9910013A
Authority
BR
Brazil
Prior art keywords
information
symbols
successive
bit
bits
Prior art date
Application number
BR9910013-4A
Other languages
English (en)
Inventor
Paul W Dent
Original Assignee
Ericsson Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ericsson Inc filed Critical Ericsson Inc
Publication of BR9910013A publication Critical patent/BR9910013A/pt

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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • 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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • 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
    • 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
    • H04L25/03184—Details concerning the metric
    • H04L25/03197—Details concerning the metric methods of calculation involving metrics
    • 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
    • H04L25/03248—Arrangements for operating in conjunction with other apparatus
    • H04L25/03292—Arrangements for operating in conjunction with other apparatus with channel estimation circuitry
    • 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
    • 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
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2017—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation
    • 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
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Artificial Intelligence (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"PROCESSO PARA TRANSMITIR BITS DE INFORMAçãO, RECEPTOR PARA DECODIFICAR SìMBOLOS DE INFORMAçãO DESCONHECIDOS INTERCALADOS COM SìMBOLOS DE INFORMAçãO CONHECIDOS, E, TRANSMISSOR PARA TRANSMITIR INFORMAçãO" Um transmissor codifica um número de 2N bits de dados pelo uso de N bits de dados para selecionar um de 2^ N^ níveis de uma onda cosenoidal e os outros N bits e dados para selecionar um dos 2^ N^ níveis de uma onda senoidal. A modulação atinge os níveis de onda cosenoidal em instantes desviados pela metade de um intervalo de símbolo de N-bit com respeito aos níveis de onda senoidal, e é chamado de QAM Desviada (OQAM). UM sinal OQAM recebido é amplificado, filtrado e digitalizado a uma velocidade de amostragem de, preferencialmente, apenas uma amostra por intervalo de meio-símbolo de N-bit. Sucessivos meio-símbolos de N-bit compreendem informação modulada alternativamente sobre uma onda portadora cosenoidal e senoidal. O receptor pode remover esta rotação sucessiva pela aplicação de sucessivas de-rotações de sucessivas amostras digitalizadas por iguais quantidades. As amostras de-rotacionadas são então correlacionadas com meio-símbolos sincronizados conhecidos. As correlações sincronizadas determinam um conjunto de coeficientes de canal descrevendo a dependência de cada amostra digitalizada sobre um ou mais meio-símbolos desconhecidos. As estimativas e canal computadas são, então, usadas para avaliar os valores esperados de amostra recebidos para todas as seq³ências possíveis de sucessivos meio-símbolos desconhecidos que devem ser decodificados. Amostras recebidas são, então, comparadas com todos os possíveis valores esperados e uma medida de desacordo ou de métrica de erro é computada. Esta seq³ência com a métrica de erro cumulativo mais baixa é usada para determinar a saída de símbolo decodificado. Em outros espectos da invenção, transmissores e receptores de modo dual são apresentados, os quais possibilitam diferentes tipos de modulação serem alternativamente utilizados em um mesmo aparelho.
BR9910013-4A 1998-04-28 1999-04-27 Processo para transmitir bits de informação, receptor para decodificar sìmbolos de informação desconhecidos intercalados com sìmbolos de informação conhecidos, e, transmissor para transmitir informação BR9910013A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/066,669 US6185259B1 (en) 1996-06-12 1998-04-28 Transmitter/receiver for GMSK and offset-QAM
PCT/US1999/007021 WO1999056442A2 (en) 1998-04-28 1999-04-27 Transmitter/receiver for gmsk and offset-qam

Publications (1)

Publication Number Publication Date
BR9910013A true BR9910013A (pt) 2001-01-09

Family

ID=22070948

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9910013-4A BR9910013A (pt) 1998-04-28 1999-04-27 Processo para transmitir bits de informação, receptor para decodificar sìmbolos de informação desconhecidos intercalados com sìmbolos de informação conhecidos, e, transmissor para transmitir informação

Country Status (11)

Country Link
US (2) US6185259B1 (pt)
EP (2) EP1333634B1 (pt)
JP (1) JP2002513247A (pt)
KR (1) KR20010043092A (pt)
CN (1) CN1309858A (pt)
AU (1) AU755079B2 (pt)
BR (1) BR9910013A (pt)
EE (1) EE200000622A (pt)
HK (1) HK1039424A1 (pt)
MY (1) MY120073A (pt)
WO (1) WO1999056442A2 (pt)

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AU3637399A (en) 1999-11-16
EP1075752B1 (en) 2005-06-22
EP1075752A2 (en) 2001-02-14
WO1999056442A3 (en) 2000-02-17
WO1999056442A2 (en) 1999-11-04
EE200000622A (et) 2002-02-15
EP1333634B1 (en) 2004-10-06
KR20010043092A (ko) 2001-05-25
MY120073A (en) 2005-08-30
EP1333634A1 (en) 2003-08-06
JP2002513247A (ja) 2002-05-08
CN1309858A (zh) 2001-08-22
WO1999056442B1 (en) 2000-04-06
HK1039424A1 (zh) 2002-04-19
AU755079B2 (en) 2002-12-05
US20010001008A1 (en) 2001-05-10
US6185259B1 (en) 2001-02-06
US6711218B2 (en) 2004-03-23

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