BR0008808A - Formatação espectral de sinal cdma - Google Patents

Formatação espectral de sinal cdma

Info

Publication number
BR0008808A
BR0008808A BR0008808-0A BR0008808A BR0008808A BR 0008808 A BR0008808 A BR 0008808A BR 0008808 A BR0008808 A BR 0008808A BR 0008808 A BR0008808 A BR 0008808A
Authority
BR
Brazil
Prior art keywords
cdma
base station
digital
spectral formatting
spectral
Prior art date
Application number
BR0008808-0A
Other languages
English (en)
Inventor
Brian K Harms
Anthony C K Soong
Thomas J Funk
Larry D Flowers
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 BR0008808A publication Critical patent/BR0008808A/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
    • 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
    • H04B1/62—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 for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • 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

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)

Abstract

"FORMATAçãO ESPECTRAL DE UM SINAL CDMA". A invenção consiste de uma tecnologia de formatação espectral CDMA (116) que atenua a potência de sinal fora de banda no sinal CDMA. O sinal CDMA em banda é atenuado próximo às freq³ências de quina para reduzir componentes que provêem uma contribuição desproporcional à potência do sinal fora de banda. O amplificador de potência (625) na estação base CDMA (512) pode então operar em níveis de potência mais elevados sem superar os limites de potência de sinal fora de banda. Como resultado, o amplificador de potência (625) opera de forma mais eficiente e estende o alcance ou capacidade da estação base. Em alguns exemplos da invenção, filtros de formatação espectral digitais (516) são posicionados entre o modem de central celular (621) e o conversor digital para analógico (623) na estação base. Em outros exemplos da invenção, filtros de formatação espectral digitais (516) são posicionados entre o conversor digital para analógico (722) e o filtro passa baixo (623) na estação base.
BR0008808-0A 1999-03-10 2000-03-10 Formatação espectral de sinal cdma BR0008808A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/265,202 US6430169B1 (en) 1999-03-10 1999-03-10 Spectral shaping a CDMA signal
PCT/US2000/006228 WO2000054425A1 (en) 1999-03-10 2000-03-10 Spectral shaping a cdma signal

Publications (1)

Publication Number Publication Date
BR0008808A true BR0008808A (pt) 2002-12-03

Family

ID=23009455

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0008808-0A BR0008808A (pt) 1999-03-10 2000-03-10 Formatação espectral de sinal cdma

Country Status (7)

Country Link
US (1) US6430169B1 (pt)
KR (1) KR100711332B1 (pt)
CN (1) CN1343395A (pt)
AU (1) AU3397000A (pt)
BR (1) BR0008808A (pt)
CA (1) CA2364359A1 (pt)
WO (1) WO2000054425A1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7058037B1 (en) * 1999-09-13 2006-06-06 Utstarcom, Inc. Radio frequency transmitting device of mobile radio communication base station system in code division multiple access system
US6724331B1 (en) * 2001-11-27 2004-04-20 Ellipsis Digital Systems, Inc. Adaptive digital spectral compensation and calibration of analog components and transceiver chains
US7133375B1 (en) * 2002-03-05 2006-11-07 Sprint Spectrum L.P. Dynamic adaptive multifunctional base station for wireless networks
US6744654B2 (en) * 2002-08-21 2004-06-01 Micron Technology, Inc. High density dynamic ternary-CAM memory architecture

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107487A (en) * 1991-05-28 1992-04-21 Motorola, Inc. Power control of a direct sequence CDMA radio
US5140610A (en) * 1991-10-08 1992-08-18 The United States Of America As Represented By The Secretary Of The Army FM video data link spectrum spreading
US5280499A (en) * 1991-10-18 1994-01-18 Ricoh Company, Ltd. Spread spectrum communication system
JPH06350562A (ja) * 1993-06-08 1994-12-22 Ricoh Co Ltd スペクトル拡散通信方式
US5918166A (en) * 1994-11-30 1999-06-29 Nec Corportion Level control circuit for portable radio communication apparatus
US5613191A (en) * 1995-05-01 1997-03-18 Bell Atlantic Network Services, Inc. Customer premise wireless distribution of audio-video, control signals and voice using CDMA
JP2718398B2 (ja) * 1995-06-30 1998-02-25 日本電気株式会社 Ｃｄｍａ基地局送信装置
US5978362A (en) * 1996-02-06 1999-11-02 Airtouch Communications, Inc. Method and apparatus for eliminating intermodulation interference in cellular telephone systems
JP3715035B2 (ja) * 1996-06-25 2005-11-09 株式会社半導体エネルギー研究所 液晶表示装置
FI101761B1 (fi) * 1996-09-02 1998-08-14 Nokia Telecommunications Oy Menetelmä ja järjestely kalibrointisignaalin muodostamiseksi
JPH10190608A (ja) * 1996-12-19 1998-07-21 Lucent Technol Inc 通信方法

Also Published As

Publication number Publication date
WO2000054425A1 (en) 2000-09-14
US6430169B1 (en) 2002-08-06
CN1343395A (zh) 2002-04-03
CA2364359A1 (en) 2000-09-14
KR20010112316A (ko) 2001-12-20
AU3397000A (en) 2000-09-28
KR100711332B1 (ko) 2007-04-27

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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.