DE69823736D1 - Interferenzunterdrückung für HF-Signale - Google Patents

Interferenzunterdrückung für HF-Signale

Info

Publication number
DE69823736D1
DE69823736D1 DE69823736T DE69823736T DE69823736D1 DE 69823736 D1 DE69823736 D1 DE 69823736D1 DE 69823736 T DE69823736 T DE 69823736T DE 69823736 T DE69823736 T DE 69823736T DE 69823736 D1 DE69823736 D1 DE 69823736D1
Authority
DE
Germany
Prior art keywords
signals
interference suppression
suppression
interference
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE69823736T
Other languages
English (en)
Other versions
DE69823736T2 (de
Inventor
Hans-Otto Scheck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Oyj
Original Assignee
Nokia Oyj
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 Nokia Oyj filed Critical Nokia Oyj
Publication of DE69823736D1 publication Critical patent/DE69823736D1/de
Application granted granted Critical
Publication of DE69823736T2 publication Critical patent/DE69823736T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • 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
    • H03D3/009—Compensating quadrature phase or amplitude imbalances
    • 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
    • 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
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0047—Offset of DC voltage or frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/009—Reduction of local oscillator or RF leakage
    • 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
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
DE69823736T 1997-04-04 1998-03-09 Interferenzunterdrückung für HF-Signale Expired - Lifetime DE69823736T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI971387 1997-04-04
FI971387A FI105367B (fi) 1997-04-04 1997-04-04 Häiriönvaimennus RF-signaaleissa

Publications (2)

Publication Number Publication Date
DE69823736D1 true DE69823736D1 (de) 2004-06-17
DE69823736T2 DE69823736T2 (de) 2005-05-12

Family

ID=8548534

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69823736T Expired - Lifetime DE69823736T2 (de) 1997-04-04 1998-03-09 Interferenzunterdrückung für HF-Signale

Country Status (4)

Country Link
US (1) US6075980A (de)
EP (1) EP0875988B1 (de)
DE (1) DE69823736T2 (de)
FI (1) FI105367B (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60027284T2 (de) * 2000-07-11 2006-08-31 Sony Deutschland Gmbh Quadraturdemodulator unter Verwendung von Leistungssensoren
US6819911B2 (en) * 2001-04-02 2004-11-16 General Dynamics Decision Systems, Inc. Active interference suppressor utilizing recombinant transmultiplexing
JP2003298441A (ja) * 2002-04-01 2003-10-17 Hitachi Ltd 低消費電力受信装置
US20030228860A1 (en) * 2002-06-06 2003-12-11 Chewnpu Jou Integrated radio-frequency receiver
WO2004015853A1 (en) 2002-08-02 2004-02-19 Nokia Corporation Quadrature demodulator using a fft-processor
JP3729171B2 (ja) * 2002-11-26 2005-12-21 松下電器産業株式会社 混合回路とこれを用いた高周波信号受信装置
US7366465B2 (en) * 2004-11-19 2008-04-29 Sirit Technologies Inc. Homodyne RFID receiver and method
US7477918B2 (en) * 2006-05-08 2009-01-13 Mediatek Inc. Radio frequency receiver and radio frequency transmitter
DE102008050327A1 (de) * 2008-10-07 2010-05-27 Endress + Hauser Gmbh + Co. Kg Empfangsmischer zur Verringerung von Überkopplungseffekten
US20100225374A1 (en) * 2009-03-06 2010-09-09 Infineon Technologies Ag Low noise mixer
US8849227B2 (en) * 2009-09-28 2014-09-30 The Trustees Of Columbia University In The City Of New York Systems and methods for controlling the second order intercept point of receivers
US8594603B2 (en) * 2009-11-08 2013-11-26 The Trustees Of Columbia University In The City Of New York Systems and methods for cancelling interferers in a receiver
US8909186B2 (en) * 2012-07-16 2014-12-09 Intel Mobile Communications GmbH Receiver, method and mobile communication device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811425A (en) * 1987-01-09 1989-03-07 Itt Avionics, A Division Of Itt Corporation Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers
US5003621A (en) * 1989-11-02 1991-03-26 Motorola, Inc. Direct conversion FM receiver
US5179730A (en) * 1990-03-23 1993-01-12 Rockwell International Corporation Selectivity system for a direct conversion receiver
US5212826A (en) * 1990-12-20 1993-05-18 Motorola, Inc. Apparatus and method of dc offset correction for a receiver
WO1994005087A1 (en) * 1992-08-25 1994-03-03 Wireless Access, Inc. A direct conversion receiver for multiple protocols
US5826180A (en) * 1994-08-08 1998-10-20 Nice Systems Ltd. Near homodyne radio frequency receiver
US5613233A (en) * 1994-09-30 1997-03-18 Rockwell International Corp. Apparatus with distortion cancelling feedback signal
US5828955A (en) * 1995-08-30 1998-10-27 Rockwell Semiconductor Systems, Inc. Near direct conversion receiver and method for equalizing amplitude and phase therein
US5784686A (en) * 1996-12-31 1998-07-21 Lucent Technologies Inc. IQ combiner technology in modulated backscatter system
US5918167A (en) * 1997-03-11 1999-06-29 Northern Telecom Limited Quadrature downconverter local oscillator leakage canceller

Also Published As

Publication number Publication date
EP0875988A3 (de) 1999-11-10
US6075980A (en) 2000-06-13
FI105367B (fi) 2000-07-31
FI971387A (fi) 1998-10-05
FI971387A0 (fi) 1997-04-04
EP0875988A2 (de) 1998-11-04
DE69823736T2 (de) 2005-05-12
EP0875988B1 (de) 2004-05-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: BECKER, KURIG, STRAUS, 80336 MUENCHEN