FI108587B - Tasajänniteoffsetin kompensoiminen radiovastaanottimessa - Google Patents

Tasajänniteoffsetin kompensoiminen radiovastaanottimessa Download PDF

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Publication number
FI108587B
FI108587B FI914165A FI914165A FI108587B FI 108587 B FI108587 B FI 108587B FI 914165 A FI914165 A FI 914165A FI 914165 A FI914165 A FI 914165A FI 108587 B FI108587 B FI 108587B
Authority
FI
Finland
Prior art keywords
signal
digital
signals
received
integration
Prior art date
Application number
FI914165A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI914165A (fi
FI914165A0 (fi
Inventor
Paul W Dent
Original Assignee
Ericsson Telefon Ab L M
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 Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of FI914165A0 publication Critical patent/FI914165A0/fi
Publication of FI914165A publication Critical patent/FI914165A/fi
Application granted granted Critical
Publication of FI108587B publication Critical patent/FI108587B/fi

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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
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • 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
    • H03D2200/0082—Quadrature arrangements
    • 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
    • H03D7/16—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
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/046—Speed or phase control by synchronisation signals using special codes as synchronising signal using a dotting sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
  • Dc Digital Transmission (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Circuits Of Receivers In General (AREA)
FI914165A 1990-09-06 1991-09-04 Tasajänniteoffsetin kompensoiminen radiovastaanottimessa FI108587B (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/578,251 US5241702A (en) 1990-09-06 1990-09-06 D.c. offset compensation in a radio receiver
US57825190 1990-09-06

Publications (3)

Publication Number Publication Date
FI914165A0 FI914165A0 (fi) 1991-09-04
FI914165A FI914165A (fi) 1992-03-07
FI108587B true FI108587B (fi) 2002-02-15

Family

ID=24312055

Family Applications (1)

Application Number Title Priority Date Filing Date
FI914165A FI108587B (fi) 1990-09-06 1991-09-04 Tasajänniteoffsetin kompensoiminen radiovastaanottimessa

Country Status (12)

Country Link
US (1) US5241702A (es)
EP (1) EP0474615B1 (es)
JP (1) JPH05316158A (es)
AU (1) AU644208B2 (es)
CA (1) CA2050666C (es)
DE (1) DE69128991T2 (es)
ES (1) ES2115609T3 (es)
FI (1) FI108587B (es)
HK (1) HK1009363A1 (es)
MX (1) MX9100956A (es)
NZ (1) NZ239628A (es)
TW (1) TW201368B (es)

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Also Published As

Publication number Publication date
FI914165A (fi) 1992-03-07
JPH05316158A (ja) 1993-11-26
AU8369691A (en) 1992-03-12
DE69128991T2 (de) 1998-06-18
EP0474615A3 (en) 1992-10-28
MX9100956A (es) 1992-05-04
CA2050666A1 (en) 1992-03-07
CA2050666C (en) 2000-11-28
EP0474615B1 (en) 1998-03-04
DE69128991D1 (de) 1998-04-09
EP0474615A2 (en) 1992-03-11
ES2115609T3 (es) 1998-07-01
FI914165A0 (fi) 1991-09-04
TW201368B (es) 1993-03-01
HK1009363A1 (en) 1999-05-28
US5241702A (en) 1993-08-31
NZ239628A (en) 1995-03-28
AU644208B2 (en) 1993-12-02

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