BR9910765A - Receptor sintonizável com uma pluralidade de canais de frequência, e, processo para receber sinais através de um canal de uma pluralidade de canais de frequência - Google Patents

Receptor sintonizável com uma pluralidade de canais de frequência, e, processo para receber sinais através de um canal de uma pluralidade de canais de frequência

Info

Publication number
BR9910765A
BR9910765A BR9910765-1A BR9910765A BR9910765A BR 9910765 A BR9910765 A BR 9910765A BR 9910765 A BR9910765 A BR 9910765A BR 9910765 A BR9910765 A BR 9910765A
Authority
BR
Brazil
Prior art keywords
frequency channels
complex numbers
signals
reference frequency
converter
Prior art date
Application number
BR9910765-1A
Other languages
English (en)
Inventor
Paul Wilkinson Dent
Original Assignee
Ericsson 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 Ericsson Inc filed Critical Ericsson Inc
Publication of BR9910765A publication Critical patent/BR9910765A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/062—Setting decision thresholds using feedforward techniques only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/008—Compensating DC offsets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0028—Correction of carrier offset at passband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Superheterodyne Receivers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

''RECEPTOR SINTONIZáVEL COM UMA PLURALIDADE DE CANAIS DE FREQuêNCIA, E, PROCESSO PARA RECEBER SINAIS ATRAVéS DE UM CANAL DE UMA PLURALIDADE DE CANAIS DE FREQuêNCIA'' Receptor sintonizável com uma pluralidade de canais de freq³ência inclui um gerador de freq³ência de referência, um conversor descendente, um conversor de analógico para digital e um processador. O gerador de freq³ência de referência gera um sinal de freq³ência de referência e o conversor descendente converte descendentemente sinais recebidos, a fim de proporcionar sinais de Freq³ência Intermediária. Além disso, o conversor descendente está sincronizado com o sinal de freq³ência de referência. O conversor de analógico para digital gera uma pluralidade de números complexos representativos dos sinais recebidos, incluindo componentes de interferência sensíveis aos sinais de Freq³ência Intermediária em que o conversor de analógico para digital está sintonizado com o sinal de freq³ência de referência. O processador estima um ponto de origem para pluralidade de números complexos e subtrai o ponto de origem de cada um dos números complexos, assim, produzindo números complexos compensados por interferência representativos dos referidos sinais recebidos com interferência internamente gerada reduzida. Além disso, o processador processa os números complexos compensados por interferência para obter a informação de sinalização desejada. Processos relacionados também são discutidos.
BR9910765-1A 1998-05-29 1999-05-07 Receptor sintonizável com uma pluralidade de canais de frequência, e, processo para receber sinais através de um canal de uma pluralidade de canais de frequência BR9910765A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/087,281 US6205183B1 (en) 1998-05-29 1998-05-29 Methods of suppressing reference oscillator harmonic interference and related receivers
PCT/US1999/010014 WO1999063655A1 (en) 1998-05-29 1999-05-07 Methods of suppressing reference oscillator harmonic interference and related receivers

Publications (1)

Publication Number Publication Date
BR9910765A true BR9910765A (pt) 2001-02-13

Family

ID=22204236

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9910765-1A BR9910765A (pt) 1998-05-29 1999-05-07 Receptor sintonizável com uma pluralidade de canais de frequência, e, processo para receber sinais através de um canal de uma pluralidade de canais de frequência

Country Status (10)

Country Link
US (1) US6205183B1 (pt)
EP (1) EP1082809B1 (pt)
JP (1) JP4447776B2 (pt)
CN (1) CN1303535A (pt)
AU (1) AU750052B2 (pt)
BR (1) BR9910765A (pt)
EE (1) EE200000699A (pt)
HK (1) HK1038443A1 (pt)
MY (1) MY124397A (pt)
WO (1) WO1999063655A1 (pt)

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US6393073B1 (en) * 1999-06-28 2002-05-21 Raytheon Company Method of frequency offset estimation and correction for adaptive antennas
DE19956947A1 (de) * 1999-11-26 2001-05-31 Philips Corp Intellectual Pty Anordnung zur Feststellung der Phasenlage eines Datensignals
EP1168597A1 (en) * 2000-06-23 2002-01-02 NTT DoCoMo, Inc. Quadrature Receiver with Orthogonality Correction
US7076225B2 (en) * 2001-02-16 2006-07-11 Qualcomm Incorporated Variable gain selection in direct conversion receiver
FI20011219A0 (fi) * 2001-06-08 2001-06-08 Nokia Corp Digitaalinen häiriö
US7003274B1 (en) * 2003-03-05 2006-02-21 Cisco Systems Wireless Networking (Australia) Pty Limited Frequency synthesizer and synthesis method for generating a multiband local oscillator signal
US7835706B2 (en) * 2004-06-30 2010-11-16 Silicon Laboratories, Inc. Local oscillator (LO) port linearization for communication system with ratiometric transmit path architecture
US7272374B2 (en) * 2004-06-30 2007-09-18 Silicon Laboratories Inc. Dynamic selection of local oscillator signal injection for image rejection in integrated receivers
US7376399B2 (en) * 2004-06-30 2008-05-20 Silicon Laboratories Inc. Weighted mixing circuitry for quadrature processing in communication systems
US7272373B2 (en) * 2004-06-30 2007-09-18 Silacon Laboratories Inc. Ratiometric clock systems for integrated receivers and associated methods
US7272375B2 (en) 2004-06-30 2007-09-18 Silicon Laboratories Inc. Integrated low-IF terrestrial audio broadcast receiver and associated method
US7376396B2 (en) * 2004-06-30 2008-05-20 Silicon Laboratories Inc. Ratiometric transmit path architecture for communication systems
US7526266B2 (en) * 2005-02-14 2009-04-28 Intelleflex Corporation Adaptive coherent RFID reader carrier cancellation
US7881688B1 (en) * 2006-09-29 2011-02-01 Marvell International Ltd. Method and apparatus for controlling a local oscillator
US7570123B2 (en) * 2006-12-27 2009-08-04 Telefonaktiebolaget Lm Ericsson (Publ) Digitally controlled analog frequency synthesizer
CN101772886B (zh) * 2007-08-07 2012-09-26 Nxp股份有限公司 用于执行谐波抑制混频的谐波抑制混频器单元和方法
US7619548B1 (en) * 2008-06-20 2009-11-17 Laser Technology, Inc. Correlated noise and spurious signal reduction
CN102195650B (zh) * 2010-03-11 2017-03-15 中兴通讯股份有限公司 模数转换系统和方法
EP2408108A1 (en) * 2010-07-14 2012-01-18 Telefonaktiebolaget L M Ericsson AB (Publ) Clocking scheme for a wireless communication device
US9264282B2 (en) * 2013-03-15 2016-02-16 Innophase, Inc. Polar receiver signal processing apparatus and methods
TWI487402B (zh) * 2012-08-10 2015-06-01 Mstar Semiconductor Inc 可用於一無線通訊系統的搜尋方法
EP2934292A1 (en) * 2012-12-19 2015-10-28 Koninklijke Philips N.V. Drive noise tolerant plaque detection
US9083588B1 (en) 2013-03-15 2015-07-14 Innophase, Inc. Polar receiver with adjustable delay and signal processing metho
JP6288143B2 (ja) * 2015-10-19 2018-03-07 日本電信電話株式会社 コヒーレント光受信装置
CN105450311A (zh) * 2015-11-06 2016-03-30 北京邮电大学 一种信号接收装置
CN113676199A (zh) * 2021-08-25 2021-11-19 福建科立讯通信有限公司 接收机参考频率源倍频干扰的解决方法和接收机

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Publication number Priority date Publication date Assignee Title
US4893316A (en) 1985-04-04 1990-01-09 Motorola, Inc. Digital radio frequency receiver
US4825448A (en) 1986-08-07 1989-04-25 International Mobile Machines Corporation Subscriber unit for wireless digital telephone system
EP0343273B1 (de) 1988-05-27 1994-04-27 Deutsche ITT Industries GmbH Korrekturschaltung für ein digitales Quadratur-Signalpaar
SE463540B (sv) 1988-09-19 1990-12-03 Ericsson Telefon Ab L M Saett foer att i ett radiokommunikationssystem digitalisera godtyckliga radiosignaler samt anordning foer utoevande av saettet
SE462943B (sv) 1989-01-26 1990-09-17 Ericsson Telefon Ab L M Saett och anordning foer frekvensstyrning av en koherent radiomottagare
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Also Published As

Publication number Publication date
WO1999063655A1 (en) 1999-12-09
HK1038443A1 (zh) 2002-03-15
JP2002517928A (ja) 2002-06-18
AU750052B2 (en) 2002-07-11
MY124397A (en) 2006-06-30
EE200000699A (et) 2002-04-15
CN1303535A (zh) 2001-07-11
EP1082809A1 (en) 2001-03-14
JP4447776B2 (ja) 2010-04-07
US6205183B1 (en) 2001-03-20
EP1082809B1 (en) 2003-07-30
AU3888799A (en) 1999-12-20

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B15K Others concerning applications: alteration of classification

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Ipc: H03D 3/00 (2006.01), H03D 7/16 (2006.01)

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

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B09B Patent application refused [chapter 9.2 patent gazette]

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