BR0008807A - Redução de picos em um sinal cdma - Google Patents

Redução de picos em um sinal cdma

Info

Publication number
BR0008807A
BR0008807A BR0008807-2A BR0008807A BR0008807A BR 0008807 A BR0008807 A BR 0008807A BR 0008807 A BR0008807 A BR 0008807A BR 0008807 A BR0008807 A BR 0008807A
Authority
BR
Brazil
Prior art keywords
cdma
signal
technology
cdma signal
base station
Prior art date
Application number
BR0008807-2A
Other languages
English (en)
Inventor
Lindsay A Weaver Jr
Brian K Harms
Anthony C K Soong
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR0008807A publication Critical patent/BR0008807A/pt

Links

Classifications

    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Amplifiers (AREA)

Abstract

"REDUçãO DE PICOS EM UM SINAL CDMA". A invenção consiste de uma tecnologia de eliminação de cristas ("decresting") CDMA que reduz ou elimina picos no sinal CDMA. A tecnologia CDMA gera um sinal de correção em resposta a picos no sinal CDMA que superem um valor. O valor corresponde tipicamente ao nível máximo de potência de um amplificador de potência. A tecnologia CDMA combina o sinal de correção com o sinal CDMA para gerar um sinal CDMA sem cristas (515) com picos reduzidos. Em alguns exemplos da invenção, a tecnologia CDMA processa representações em coordenadas polares dos componentes de quadratura do sinal CDMP, para gerar o sinal de correção. Pelo uso da invenção, o amplificador de potência (625) em uma estação base CDMA pode (512) operar em níveis de potência maiores sem superar as limitações de sinal fora de banda. Como resultado, a estação base opera mais eficientemente e com um maior alcance ou capacidade.
BR0008807-2A 1999-03-10 2000-03-10 Redução de picos em um sinal cdma BR0008807A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/265,203 US6515961B1 (en) 1999-03-10 1999-03-10 Decresting peaks in a CDMA signal
PCT/US2000/006229 WO2000054426A1 (en) 1999-03-10 2000-03-10 Decresting peaks in a cdma signal

Publications (1)

Publication Number Publication Date
BR0008807A true BR0008807A (pt) 2003-03-05

Family

ID=23009461

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0008807-2A BR0008807A (pt) 1999-03-10 2000-03-10 Redução de picos em um sinal cdma

Country Status (9)

Country Link
US (1) US6515961B1 (pt)
EP (1) EP1157476A1 (pt)
KR (1) KR20020009571A (pt)
CN (1) CN1355960A (pt)
AU (1) AU3522000A (pt)
BR (1) BR0008807A (pt)
CA (1) CA2364363A1 (pt)
HK (1) HK1045416A1 (pt)
WO (1) WO2000054426A1 (pt)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4224168B2 (ja) * 1999-04-23 2009-02-12 パナソニック株式会社 基地局装置及びピーク電力抑圧方法
US6996080B1 (en) * 1999-07-23 2006-02-07 Itt Manufacturing Enterprises, Inc. Chip-synchronous CDMA multiplexer and method resulting in constant envelope signals
US7266354B2 (en) * 2001-06-25 2007-09-04 Telefonaktiebolaget Lm Ericsson (Publ) Reducing the peak-to-average power ratio of a communication signal
GB2377141B (en) * 2001-06-29 2005-03-23 Nokia Corp A transmitter
FR2832569B1 (fr) * 2001-11-22 2007-04-27 Evolium Sas Procede de transmission de communications dans un systeme de telecommunication de type cellulaire utilisant des bandes de frequences porteuses adjacentes
WO2003075457A2 (en) * 2002-03-01 2003-09-12 Andrew Corporation Apparatus and method for reducing peak-to-average signal power ratio
US6891902B2 (en) * 2002-07-02 2005-05-10 Intel Corporation System and method for adjusting a power level of a transmission signal
KR100475180B1 (ko) * 2002-10-24 2005-03-10 엘지전자 주식회사 멀티캐리어 송신기용 피에이알(par）감소장치
US8064330B2 (en) * 2008-03-26 2011-11-22 Qualcomm Incorporated Bit-width minimization scheme for wireless communication
WO2013009761A1 (en) * 2011-07-13 2013-01-17 The Foundry, Llc Methods and apparatus for delivering a therapeutic agent to nasopharyngeal mucosa targets
CN104954094B (zh) * 2014-03-28 2018-01-23 华为技术有限公司 信号限幅方法和装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291409A (en) * 1978-06-20 1981-09-22 The Mitre Corporation Spread spectrum communications method and apparatus
US4462001A (en) 1982-02-22 1984-07-24 Canadian Patents & Development Limited Baseband linearizer for wideband, high power, nonlinear amplifiers
US5287387A (en) 1992-03-06 1994-02-15 Motorola, Inc. Low splatter peak-to-average signal reduction
JP2718398B2 (ja) 1995-06-30 1998-02-25 日本電気株式会社 Ｃｄｍａ基地局送信装置
US5742201A (en) * 1996-01-30 1998-04-21 Spectrian Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier
GB2315379B (en) 1996-07-11 2001-01-10 Roke Manor Research Non-linear filter apparatus
JPH10190608A (ja) 1996-12-19 1998-07-21 Lucent Technol Inc 通信方法
JP3311950B2 (ja) * 1996-12-19 2002-08-05 富士通株式会社 符号多重無線装置
JP3311951B2 (ja) * 1996-12-20 2002-08-05 富士通株式会社 符号多重送信装置
US6031865A (en) * 1997-08-04 2000-02-29 Motorola, Inc. Rapidly decorrelating spreading sequences for DS-CDMA transceivers

Also Published As

Publication number Publication date
HK1045416A1 (zh) 2002-11-22
KR20020009571A (ko) 2002-02-01
AU3522000A (en) 2000-09-28
CN1355960A (zh) 2002-06-26
US6515961B1 (en) 2003-02-04
WO2000054426A1 (en) 2000-09-14
CA2364363A1 (en) 2000-09-14
EP1157476A1 (en) 2001-11-28

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A(S) 9A,10A E 11A ANUIDADE(S).

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2112 DE 28/06/2011.