BR9805262A - Redução da proporção de pico para média de sinal de transmissão por rotação intencional de fase entre sinais compostos. - Google Patents

Redução da proporção de pico para média de sinal de transmissão por rotação intencional de fase entre sinais compostos.

Info

Publication number
BR9805262A
BR9805262A BR9805262-4A BR9805262A BR9805262A BR 9805262 A BR9805262 A BR 9805262A BR 9805262 A BR9805262 A BR 9805262A BR 9805262 A BR9805262 A BR 9805262A
Authority
BR
Brazil
Prior art keywords
phase
signal
phase rotation
reduction
orthogonal modulation
Prior art date
Application number
BR9805262-4A
Other languages
English (en)
Inventor
Douglas Knisely
Martin Howard Meyers
Wen-Yi Kuo
Sanjiv Nanda
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR9805262A publication Critical patent/BR9805262A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0077—Multicode, e.g. multiple codes assigned to one user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

REDUçãO DA PROPORçãO DE PICO PARA MéDIA DE SINAL DE TRANSMISSãO POR ROTAçãO INTENCIONAL DE FASE ENTRE SINAIS COMPOSTOS. Aparelho para reduzir espaço livre do amplificador de potência em um sistema de transmissão sem fio compreende um circuito de modulação ortogonal e um circuito de rotação de fase acoplado ao circuito de modulação ortogonal. O circuito de modulação ortogonal utiliza um código Walsh para modular um sinal em-fase e um sinal de quadratura. O circuito de modulação ortogonal tem saída em-fase e uma saída de quadratura. O circuito de rotação de fase gira a fase do sinal em-fase e do sinal de quadratura, produzindo um sinal em-fase girado e um sinal de quadratura girado em-fase. Múltiplos canais definidos por código Walsh são associados com um usuário sem fim específico.
BR9805262-4A 1997-12-15 1998-12-10 Redução da proporção de pico para média de sinal de transmissão por rotação intencional de fase entre sinais compostos. BR9805262A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/990,626 US20010055282A1 (en) 1997-12-15 1997-12-15 Reducing peak to average ratio of transmit signal by intentional phase rotating among composed signals

Publications (1)

Publication Number Publication Date
BR9805262A true BR9805262A (pt) 1999-12-28

Family

ID=25536351

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9805262-4A BR9805262A (pt) 1997-12-15 1998-12-10 Redução da proporção de pico para média de sinal de transmissão por rotação intencional de fase entre sinais compostos.

Country Status (7)

Country Link
US (1) US20010055282A1 (pt)
EP (1) EP0924870A2 (pt)
JP (1) JPH11298378A (pt)
KR (1) KR19990063066A (pt)
BR (1) BR9805262A (pt)
CA (1) CA2254483A1 (pt)
TW (1) TW411668B (pt)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100406531B1 (ko) * 1999-05-31 2003-11-22 한국전자통신연구원 이동통신시스템에서 가변팩터직교확산 코드를 이용하여데이터 메시지를 변조하기 위한 장치 및 방법
US6939474B2 (en) * 1999-07-30 2005-09-06 Formfactor, Inc. Method for forming microelectronic spring structures on a substrate
KR100668198B1 (ko) * 1999-08-24 2007-01-11 주식회사 팬택앤큐리텔 Ｉｍｔ 2000 단말기용 변조기
CN1387703A (zh) * 1999-09-07 2002-12-25 艾利森公司 使用智能调制代码分配的无线通信设备和方法
US6961369B1 (en) 1999-11-09 2005-11-01 Aware, Inc. System and method for scrambling the phase of the carriers in a multicarrier communications system
US6535562B1 (en) * 1999-11-30 2003-03-18 Qualcomm Inc. Method and apparatus for rotating the phase of a complex signal
KR100354337B1 (ko) * 1999-12-04 2002-09-28 한국과학기술원 대역 확산 통신 방식에서의 확산 변조 방식을 이용한송수신방식 및 송수신장치
EP1195917B1 (en) * 2000-08-02 2004-02-25 Lucent Technologies Inc. Method for peak to average power ratio reduction in wireless communication system
GB0027392D0 (en) * 2000-11-09 2001-03-07 Roke Manor Research Code specific phase shifts applied to spread spectrum systems using walsh-handarmed codes
KR20010069611A (ko) * 2001-04-20 2001-07-25 유흥균 다중 반송파 통신 시스템에서 지연회로를 이용한 피크대평균 전력비(papr) 저감 방법
US7002899B2 (en) * 2001-10-09 2006-02-21 Ati Technologies Inc. Method and apparatus to improve SCDMA headroom
KR100446744B1 (ko) * 2001-12-31 2004-09-01 엘지전자 주식회사 기지국 송신신호의 ｐａｒ개선 장치 및 방법
KR100452512B1 (ko) * 2002-08-16 2004-10-13 엘지전자 주식회사 채널용량 개선 왈쉬코드 확산장치 및 그 운용방법
KR100475180B1 (ko) * 2002-10-24 2005-03-10 엘지전자 주식회사 멀티캐리어 송신기용 피에이알(par）감소장치
JP4020253B2 (ja) * 2003-02-07 2007-12-12 日本電信電話株式会社 伝送モード選択方法および無線通信装置
US8422434B2 (en) * 2003-02-18 2013-04-16 Qualcomm Incorporated Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems
KR20040014614A (ko) * 2004-01-13 2004-02-14 유흥균 코드선택 기법과 코드율이 1인 새로운 프리코딩을이용하여 대역폭 증가가 없는 2진 정진폭 mc-cdma 통신시스템의 설계 방법과 장치구성
GB0623481D0 (en) * 2006-11-24 2007-01-03 Imp Innovations Ltd Improved methods and apparatus for transmitting and receiving data
US8055199B2 (en) * 2008-12-31 2011-11-08 Qualcomm Incorporated Methods and systems for co-channel interference cancellation in wireless networks
US20120158346A1 (en) * 2010-12-17 2012-06-21 Silicon Image, Inc. Iddq testing of cmos devices

Also Published As

Publication number Publication date
KR19990063066A (ko) 1999-07-26
CA2254483A1 (en) 1999-06-15
TW411668B (en) 2000-11-11
US20010055282A1 (en) 2001-12-27
JPH11298378A (ja) 1999-10-29
EP0924870A2 (en) 1999-06-23

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law