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BR0001970A - Transmissor com meios para escalar complementarmente sinais de entrada e saìda de um conversor d/a - Google Patents

Transmissor com meios para escalar complementarmente sinais de entrada e saìda de um conversor d/a

Info

Publication number
BR0001970A
BR0001970A BR0001970A BR0001970A BR0001970A BR 0001970 A BR0001970 A BR 0001970A BR 0001970 A BR0001970 A BR 0001970A BR 0001970 A BR0001970 A BR 0001970A BR 0001970 A BR0001970 A BR 0001970A
Authority
BR
Brazil
Prior art keywords
transmitter
amplitude signal
converter
complementarily
digital amplitude
Prior art date
Application number
BR0001970A
Other languages
English (en)
Inventor
Tominari Nomura
Original Assignee
Nec Corp
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 Nec Corp filed Critical Nec Corp
Publication of BR0001970A publication Critical patent/BR0001970A/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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • 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)
  • Transmitters (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Analogue/Digital Conversion (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

''TRANSMISSOR COM MEIOS PARA ESCALAR COMPLEMENTARMENTE SINAIS DE ENTRADA E SAìDA DE UM CONVERSOR D/A''. Em um transmissor de espectro difundido, uma quantidade de sinais de canal de espectro difundido são multiplexados para um sinal de amplitude digital por um multiplexador (1) e a potência média no tempo do sinal de amplitude digital é determinada por meio de um calculador de média (3). O sinal de amplitude digital é interpolado por um interpolador (2), escalado de acordo com um primeiro fator de escala por um agente de deslocamento de bit (5) e convertido para um sinal de amplitude analógico por um conversor D/A (6). O sinal de amplitude analógico é então escalado de acordo com um segundo fator de escala em um amplificador de ganho controlado (7). Os primeiro e segundo fatores são complementarmente variados por um circuito de controle (4) de acordo com a saída do calculador de média (3) de modo que a razão portador/ruído do transmissor seja mantida substancialmente constante a despeito da variação do nível de potência dos sinais multiplexados.
BR0001970A 1999-06-02 2000-06-02 Transmissor com meios para escalar complementarmente sinais de entrada e saìda de um conversor d/a BR0001970A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15485399A JP2000349640A (ja) 1999-06-02 1999-06-02 符号分割多重化送信装置

Publications (1)

Publication Number Publication Date
BR0001970A true BR0001970A (pt) 2001-01-02

Family

ID=15593345

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0001970A BR0001970A (pt) 1999-06-02 2000-06-02 Transmissor com meios para escalar complementarmente sinais de entrada e saìda de um conversor d/a

Country Status (7)

Country Link
US (1) US7027482B1 (pt)
EP (1) EP1058397B1 (pt)
JP (1) JP2000349640A (pt)
KR (1) KR100382808B1 (pt)
CN (1) CN1118160C (pt)
BR (1) BR0001970A (pt)
DE (1) DE60016086T2 (pt)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100382487B1 (ko) * 2000-11-02 2003-05-09 엘지전자 주식회사 이득 및 위상 왜곡 보상 기능을 가지는 이동통신 송신시스템
KR20020051098A (ko) * 2000-12-22 2002-06-28 구자홍 디지털 송신 이득 조절기를 갖는 ｃｄｍａ 송신기
FI20011238A0 (fi) * 2001-06-12 2001-06-12 Nokia Corp Menetelmä signaalin rajoittamiseksi ja lähetin
US7809393B2 (en) * 2003-05-09 2010-10-05 Nxp B.V. Method and arrangement for setting the transmission of a mobile communication device
US7453945B2 (en) * 2003-09-05 2008-11-18 Lucent Technologies Inc. Methods and devices for controlling RF, multi-carrier amplifier signal power
JP2006005525A (ja) * 2004-06-16 2006-01-05 Nec Corp 送信装置
US20070177654A1 (en) * 2006-01-31 2007-08-02 Vladimir Levitine Detecting signal carriers of multiple types of signals in radio frequency input for amplification
WO2008073737A2 (en) * 2006-12-08 2008-06-19 Adaptix, Inc. Power control method and apparatus for wireless communication system
CN101198156B (zh) 2006-12-08 2012-10-31 昂达博思公司 管理无线基站切换信息的系统和方法
CN101197599A (zh) * 2006-12-08 2008-06-11 昂达博思公司 无线通信系统的功率控制方法和装置
US9425747B2 (en) * 2008-03-03 2016-08-23 Qualcomm Incorporated System and method of reducing power consumption for audio playback
US8717211B2 (en) 2010-11-30 2014-05-06 Qualcomm Incorporated Adaptive gain adjustment system
CA2892508A1 (en) * 2012-11-26 2014-05-30 Adc Telecommunications, Inc. Timeslot mapping and/or aggregation element for digital radio frequency transport architecture
KR102190358B1 (ko) * 2014-12-10 2020-12-11 삼성전자주식회사 통신 시스템에서 이득 제어를 위한 방법 및 장치

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0793579B2 (ja) 1989-07-11 1995-10-09 ヤマハ株式会社 Ｄ／ａ変換装置
US5519732A (en) * 1994-05-02 1996-05-21 Harris Corporation Digital baseband to IF conversion in cellular base stations
JP2718398B2 (ja) * 1995-06-30 1998-02-25 日本電気株式会社 Ｃｄｍａ基地局送信装置
US5715526A (en) * 1995-09-08 1998-02-03 Qualcomm Incorporated Apparatus and method for controlling transmission power in a cellular communications system
US5708681A (en) * 1996-04-23 1998-01-13 Bell Communications Research, Inc. Hybrid analog/digital method and apparatus for controlling the transmission power level of a radio transceiver
JP2856250B2 (ja) * 1997-06-27 1999-02-10 日本電気株式会社 コード多重通信方式における増幅部利得補償装置
JP3355295B2 (ja) * 1997-11-13 2002-12-09 松下電器産業株式会社 送信電力制御方法及び送受信装置
JP3109589B2 (ja) * 1998-03-18 2000-11-20 日本電気株式会社 Ｃｄｍａ端末の送信パワー調整方法及び装置
US6266320B1 (en) * 1998-04-08 2001-07-24 Telefonaktiebolaget Lm Ericsson (Publ) Amplitude limitation in CDMA system
US6286994B1 (en) * 1998-04-29 2001-09-11 Qualcomm Incorporated System, method and computer program product for controlling a transmit signal using an expected power level
DE19824233B4 (de) * 1998-05-29 2005-10-06 Telefonaktiebolaget Lm Ericsson (Publ) Amplitudenbegrenzung
JP3180769B2 (ja) * 1998-07-17 2001-06-25 日本電気株式会社 受信電力算出方法及び移動局
US6166601A (en) * 1999-01-07 2000-12-26 Wiseband Communications Ltd. Super-linear multi-carrier power amplifier
US6463296B1 (en) * 1999-02-16 2002-10-08 Telefonaktiebolaget L M Ericsson (Publ) Power control in a CDMA mobile communications system
JP3381689B2 (ja) * 1999-11-30 2003-03-04 日本電気株式会社 非線形歪み補償回路及びそれを用いた送信装置並びに移動通信機

Also Published As

Publication number Publication date
KR100382808B1 (ko) 2003-05-09
KR20010007171A (ko) 2001-01-26
EP1058397A3 (en) 2003-10-15
CN1276658A (zh) 2000-12-13
DE60016086T2 (de) 2005-12-15
CN1118160C (zh) 2003-08-13
DE60016086D1 (de) 2004-12-30
EP1058397B1 (en) 2004-11-24
US7027482B1 (en) 2006-04-11
JP2000349640A (ja) 2000-12-15
EP1058397A2 (en) 2000-12-06

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Legal Events

Date Code Title Description
B08F Application fees: application dismissed [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7O, 8O E 9O ANUIDADES.

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 NA RPI2003 DE 26/05/2009.

B15K Others concerning applications: alteration of classification

Ipc: H04B 1/707 (2011.01)