BRPI0508735A - aparelho para reduzir a interferência de canais adjacentes entre unidades de comunicação sem fio próximas - Google Patents

aparelho para reduzir a interferência de canais adjacentes entre unidades de comunicação sem fio próximas

Info

Publication number
BRPI0508735A
BRPI0508735A BRPI0508735-0A BRPI0508735A BRPI0508735A BR PI0508735 A BRPI0508735 A BR PI0508735A BR PI0508735 A BRPI0508735 A BR PI0508735A BR PI0508735 A BRPI0508735 A BR PI0508735A
Authority
BR
Brazil
Prior art keywords
wireless communication
filter
adjacent channels
group delay
communication units
Prior art date
Application number
BRPI0508735-0A
Other languages
English (en)
Inventor
Gerard Klahn
Robert Troiano
Fryderyk Tyra
Tinothy A Axness
Original Assignee
Interdigital Tech 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 Interdigital Tech Corp filed Critical Interdigital Tech Corp
Publication of BRPI0508735A publication Critical patent/BRPI0508735A/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
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Noise Elimination (AREA)
  • Amplifiers (AREA)
  • Transceivers (AREA)

Abstract

Aparelho para reduzir a interferência de canais adjacentes entre unidades de comunicação sem fio próximas. Cada unidade de comunicação sem fio inclui um circuito de faixa base digital e um circuito de faixa base analógico. O circuito de faixa digitalinclui pelo menos um equalizador de compensação de atrasos de grupos e pelo menos um filtro de resposta de impulso finito (FIR). O circuito de fase analógico inclui um rádio (seção transmissora), amplificador de potência e filtro de faixa estreita. O filtro de faixa estreita compensa deficiências do amplificador de potência que incluem distorção e vazamento de potência de rádio freqüência (RF). O filtro de compensação de atrasos de grupos compensa características indesejadas (tais como variação de atrasos de grupos) exibidas pelo filtro estreito.
BRPI0508735-0A 2004-03-31 2005-03-22 aparelho para reduzir a interferência de canais adjacentes entre unidades de comunicação sem fio próximas BRPI0508735A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US55793104P 2004-03-31 2004-03-31
PCT/US2005/009499 WO2005101675A2 (en) 2004-03-31 2005-03-22 Apparatus for reducing channel interference between proximate wireless communication units

Publications (1)

Publication Number Publication Date
BRPI0508735A true BRPI0508735A (pt) 2007-08-14

Family

ID=35150653

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0508735-0A BRPI0508735A (pt) 2004-03-31 2005-03-22 aparelho para reduzir a interferência de canais adjacentes entre unidades de comunicação sem fio próximas

Country Status (12)

Country Link
US (1) US20050226345A1 (pt)
EP (1) EP1730844A2 (pt)
JP (1) JP2007536772A (pt)
CN (1) CN101421932A (pt)
AR (1) AR048354A1 (pt)
AU (1) AU2005234405A1 (pt)
BR (1) BRPI0508735A (pt)
CA (1) CA2561547A1 (pt)
IL (1) IL177822A0 (pt)
NO (1) NO20064836L (pt)
TW (2) TWI263411B (pt)
WO (1) WO2005101675A2 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101411155A (zh) * 2006-03-28 2009-04-15 Nxp股份有限公司 具有延迟失配补偿的发射机
KR101947066B1 (ko) * 2011-09-15 2019-02-12 인텔 코포레이션 전치 왜곡 선형화 통신 시스템 및 송신기의 전치 왜곡 선형화 방법
US9065425B2 (en) 2013-03-14 2015-06-23 Telefonaktiebolaget L M Ericsson (Publ) Feed-forward linearization without phase shifters
KR102178269B1 (ko) * 2019-10-29 2020-11-12 국방과학연구소 광대역 공용데이터링크 시스템의 수신 장치 및 그 군 지연 왜곡 보상 방법

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
US4112370A (en) * 1976-08-06 1978-09-05 Signatron, Inc. Digital communications receiver for dual input signal
FI85201C (fi) * 1988-08-16 1992-03-10 Nokia Mobira Oy En kombinerad analog/digital frekvensmodulator.
JPH06252801A (ja) * 1993-03-01 1994-09-09 Nippon Telegr & Teleph Corp <Ntt> 一周波時分割双方向無線通信方式
US5768317A (en) * 1995-05-08 1998-06-16 National Semiconductor Corporation Equalization filter compensating for distortion in a surface acoustic wave device
SE508680C2 (sv) * 1996-06-19 1998-10-26 Ericsson Telefon Ab L M Integrerade filter
US6529750B1 (en) * 1998-04-03 2003-03-04 Conductus, Inc. Microstrip filter cross-coupling control apparatus and method
JP2000244264A (ja) * 1999-02-24 2000-09-08 Hitachi Ltd 高周波電力増幅装置
US6356171B2 (en) * 1999-03-27 2002-03-12 Space Systems/Loral, Inc. Planar general response dual-mode cavity filter
JP2000299652A (ja) * 1999-04-15 2000-10-24 Matsushita Electric Ind Co Ltd 送信装置
US6473133B1 (en) * 1999-05-14 2002-10-29 Harris Corporation Broadcast transmission system with correction for distortion caused by amplifying and signal conditioning components at a different rate
JP3452865B2 (ja) * 2000-04-27 2003-10-06 株式会社国際電気エンジニアリング 送信電力増幅装置
US20020131522A1 (en) * 2001-03-14 2002-09-19 Tilman Felgentreff Method and apparatus for the digital predistortion linearization, frequency response compensation linearization and feedforward linearization of a transmit signal
WO2002091612A1 (fr) * 2001-05-01 2002-11-14 Mitsubishi Denki Kabushiki Kaisha Procede et appareil d'elimination de distortion
JP3862517B2 (ja) * 2001-05-17 2006-12-27 シャープ株式会社 半導体集積回路装置及びこれを用いた通信装置
US6895219B2 (en) * 2001-08-27 2005-05-17 Symbol Technologies Inc. Dual use of FFT circuity in imagers and transceivers
GB2394390B (en) * 2002-10-18 2005-07-06 Ipwireless Inc Arrangement and method for RF filter
US7027780B2 (en) * 2003-09-30 2006-04-11 Broadcom Corporation Technique for improving modulation performance of translational loop RF transmitters

Also Published As

Publication number Publication date
IL177822A0 (en) 2006-12-31
TW200642317A (en) 2006-12-01
EP1730844A2 (en) 2006-12-13
CA2561547A1 (en) 2005-10-27
NO20064836L (no) 2006-10-24
JP2007536772A (ja) 2007-12-13
AU2005234405A1 (en) 2005-10-27
WO2005101675A3 (en) 2009-04-23
TW200534614A (en) 2005-10-16
AR048354A1 (es) 2006-04-19
US20050226345A1 (en) 2005-10-13
TWI263411B (en) 2006-10-01
WO2005101675A2 (en) 2005-10-27
CN101421932A (zh) 2009-04-29

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BRPI0508735A (pt) aparelho para reduzir a interferência de canais adjacentes entre unidades de comunicação sem fio próximas

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 7A ANUIDADE.

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 2158 DE 15/05/2012.