BR0009649A - Processo e aparelho para modular e para demodular pelo menos uma parte de um sinal de sincronização em um sistema de comunicação móvel - Google Patents

Processo e aparelho para modular e para demodular pelo menos uma parte de um sinal de sincronização em um sistema de comunicação móvel

Info

Publication number
BR0009649A
BR0009649A BR0009649-0A BR0009649A BR0009649A BR 0009649 A BR0009649 A BR 0009649A BR 0009649 A BR0009649 A BR 0009649A BR 0009649 A BR0009649 A BR 0009649A
Authority
BR
Brazil
Prior art keywords
modulating
resulting
demodulating
communication system
mobile communication
Prior art date
Application number
BR0009649-0A
Other languages
English (en)
Other versions
BRPI0009649B1 (pt
Inventor
Branislav Popovic
Original Assignee
Ericsson Telefon Ab L M
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 Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR0009649A publication Critical patent/BR0009649A/pt
Publication of BRPI0009649B1 publication Critical patent/BRPI0009649B1/pt

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
    • 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
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2078—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70706—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with means for reducing the peak-to-average power ratio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"PROCESSO E APARELHO PARA MODULAR E PARA DEMODULAR PELO MENOS UMA PARTE DE UM SINAL DE SINCRONIZAçãO EM UM SISTEMA DE COMUNICAçãO MóVEL". Em uma concretização, um processo e aparelho para modulação de preâmbulo de Canal de Acesso Aleatório (RACH) são apresentados nos quais os componentes real (I) e imaginário (Q) de um preâmbulo RACH complexo (b(k)) são filtrados em correspondentes filtros modeladores de pulso (206,208). Conseq³entemente, as transições de fase no sinal resultante são limitadas em todas as posições de chip, e os códigos de quadrifase resultantes produzem sinais transmitidos com Relações de Potência de Pico para Média (PAPRs) mais baixas que aquelas que resultam usando esquemas de modulação de Chaveamento de Fase Híbrido (HPSK) convencionais. Por outro lado, o código de sincronização de quadrifase resultante retém a mesma magnitude de auto-correlação aperiódica de código binário original (a(k)), otimizada para produzir a mínima probabilidade de sincronização incorreta.
BRPI0009649-0A 1999-04-08 2000-04-04 Processo e aparelho para modular e para demodular pelo menos uma parte de um sinal de sincronização em um sistema de comunicação móvel BRPI0009649B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/288,747 US6549564B1 (en) 1999-04-08 1999-04-08 Random access in a mobile telecommunications system
PCT/SE2000/000644 WO2000062436A1 (en) 1999-04-08 2000-04-04 Reduction of peak-to-average power ratio in a mobile telecommunications system

Publications (2)

Publication Number Publication Date
BR0009649A true BR0009649A (pt) 2002-02-05
BRPI0009649B1 BRPI0009649B1 (pt) 2015-07-21

Family

ID=23108477

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0009649-0A BRPI0009649B1 (pt) 1999-04-08 2000-04-04 Processo e aparelho para modular e para demodular pelo menos uma parte de um sinal de sincronização em um sistema de comunicação móvel

Country Status (15)

Country Link
US (1) US6549564B1 (pt)
EP (1) EP1166456B1 (pt)
JP (1) JP3575752B2 (pt)
KR (1) KR20020004992A (pt)
CN (1) CN1192507C (pt)
AR (1) AR023387A1 (pt)
AT (1) ATE405996T1 (pt)
AU (1) AU774324B2 (pt)
BR (1) BRPI0009649B1 (pt)
CA (1) CA2366591C (pt)
DE (1) DE60039974D1 (pt)
ES (1) ES2311454T3 (pt)
MY (1) MY126030A (pt)
TW (1) TW462149B (pt)
WO (1) WO2000062436A1 (pt)

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JP4362090B2 (ja) * 2004-07-05 2009-11-11 パナソニック株式会社 変調器
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GB2469229B (en) 2005-11-04 2011-02-02 Nec Corp Wireless communication system and method of controlling a transmission power
US8050250B2 (en) * 2006-01-18 2011-11-01 Zte Corporation Random access method for user equipment in time division synchronization code division multiple access communication system
KR20070095583A (ko) * 2006-03-21 2007-10-01 삼성전자주식회사 이동통신 시스템에서 메시지 전송 장치 및 방법
WO2008058143A2 (en) * 2006-11-06 2008-05-15 Qualcomm Incorporated Methods and apparatus for power allocation and/or rate selection for ul mimo/simo operations with par considerations
KR20080084536A (ko) * 2007-03-16 2008-09-19 엘지전자 주식회사 무선통신 시스템에서 제어정보 전송 방법
WO2008114967A1 (en) 2007-03-16 2008-09-25 Lg Electronics Inc. Method of generating random access preambles in wireless communication system
CN101636937B (zh) * 2007-03-16 2013-05-01 Lg电子株式会社 在无线通信系统中生成随机接入前导码的方法
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KR100933205B1 (ko) 2008-05-09 2009-12-22 (주) 콘텔라 Ｗｃｄｍａ 물리 랜덤 액세스 채널 복조장치 및 복조방법
JP5350068B2 (ja) * 2009-04-30 2013-11-27 日本電波工業株式会社 相関ピーク検出方法及び無線機
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Also Published As

Publication number Publication date
CA2366591A1 (en) 2000-10-19
DE60039974D1 (de) 2008-10-02
JP2002542650A (ja) 2002-12-10
KR20020004992A (ko) 2002-01-16
MY126030A (en) 2006-09-29
AR023387A1 (es) 2002-09-04
WO2000062436A1 (en) 2000-10-19
EP1166456A1 (en) 2002-01-02
AU4161400A (en) 2000-11-14
ATE405996T1 (de) 2008-09-15
BRPI0009649B1 (pt) 2015-07-21
AU774324B2 (en) 2004-06-24
CA2366591C (en) 2009-12-15
CN1192507C (zh) 2005-03-09
ES2311454T3 (es) 2009-02-16
CN1364348A (zh) 2002-08-14
JP3575752B2 (ja) 2004-10-13
EP1166456B1 (en) 2008-08-20
US6549564B1 (en) 2003-04-15
TW462149B (en) 2001-11-01

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Legal Events

Date Code Title Description
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 21/07/2015, OBSERVADAS AS CONDICOES LEGAIS.