FI112740B - Förfarande och anordning för reglering av automatisk förstärkning och eliminering av DC-offset i en kvadraturmottagare - Google Patents

Förfarande och anordning för reglering av automatisk förstärkning och eliminering av DC-offset i en kvadraturmottagare Download PDF

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Publication number
FI112740B
FI112740B FI956286A FI956286A FI112740B FI 112740 B FI112740 B FI 112740B FI 956286 A FI956286 A FI 956286A FI 956286 A FI956286 A FI 956286A FI 112740 B FI112740 B FI 112740B
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Finland
Prior art keywords
signal
baseband
frequency
gain control
output
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FI956286A
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English (en)
Finnish (fi)
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FI956286A (sv
FI956286A0 (sv
Inventor
Peter J Black
Nathaniel B Wilson
Paul E Peterzell
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Qualcomm Inc
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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/002—Modifications of demodulators to reduce interference by undesired signals
    • 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
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3089—Control of digital or coded signals
    • 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
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0025—Gain control circuits
    • 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
    • H03D2200/005—Analog to digital conversion
    • 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
    • H03D2200/0052—Digital to analog conversion

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Claims (10)

1. En automatisk förstärkningskontrollanord-ning, vilken innefattar en reglerbar förstärkare (18), vilken innefattar en ingängsport för mottagning av en 5 ingängssignal, en kontrollport för mottagning av för-stärkningskontrollsignaler och en avgängsport för gi-vande av en avgängssignal, vilken anordning innefattar: en nedkonverter (20), vilken är kopplad tili ut-10 gängsporten för nedkonverterande av avgangssignalens frekvens tili en basbandsfrekvens för bildande av en basbandssignal, vilken nedkonverter fungerar för arr-angerande av avgangssignalens bärfrekvens tili basban-dets frekvensoffset med en i förväg bestämd marginal 15 fran DC; medel (154) för genererande av en mottagen effekt-signal baserande pä effekten av en kompenserad basbandssignal ; kännetecknad därav, att anordningen ytter-20 ligare innefattar: en DC genomföringssänkningsslinga (150, 200), vil-. ken är anordnad för att motta basbandssignalen för sänkande av DC genomföringssignalerna som nedkonver-·' tern bildat och för givande av en kompenserad bas- 2. bandssignal; och ,· en saturerbar integrator (22) för jämförande av ; den mottagna effektsignalen med en referenssignal och Γ: för bildande av en felsignal pä basen av jämförelsen, vilken saturerbar integrator (22) innefattar medel för 30 givande av en förstärkningskontrollsignal genom att alternativt integrera felsignalen baserande pä värden av fel- och förstärkningskontrollsignalerna.
2. Förstärkningskontrollanordning enligt pa-tentkrav 1, kännetecknad därav, att DC genom- 35 föringssänkningsslingan (200) innefattar en subtrahend (212, 214) vilken innefattar en för-sta ingäng för mottagning av basbandssignalen och en 112740 32 avgängsport, vilken är funktionellt kopplad tili in-gängen av lägpassfiltret (76, 78); och en integrator (204, 206), vilken innefattar en integrators ingängsport, vilken är funktionellt kopplad 5 tili avgängsporten av lägpassf iltret (76, 78) och en integrators avgängsport, vilken är funktionellt kopplad tili andra ingängen av subtrahenden (212, 214).
3. En förstärkningskontrollanordning enligt patentkrav 2, kännetecknad därav, att DC 10 genomföringssänkningsslingan innefattar en analog-digital-konverter (86, 88), vilken är kopplad tili avgängen av lägpassfiltret (76, 78); och en digital-analog-konverter (208, 210), vilken är tillsatt mellan integratorns (204, 206) avgängsport 15 och subtrahendens (212, 214) andra ingäng.
4. En förstärkningskontrollanordning enligt patentkrav 2, kännetecknad därav, att DC genomföringssänkningsslingan (150,200) innefattar ett högpassfilter (150), vilket är tillsatt mellan av- 20 gängsporten av lägpassfiltret (76, 78) och integra torns (204, 206) ingängsport.
5. En förstärkningskontrollanordning enligt : patentkrav 1, kännetecknad därav, att integra- tormedlen (22) innefattar första medel (103, 110, 114, • 25 108, 130, 102, 112, 106) för alternativ koppling av felsignalen för att integreras bara dä styrkan av för-stärkningskontrollsignalen är under en i förväg be-stämd tröskel och andra medel (118, 124, 128, 122, 130, 116, 120, 126) för alternativ koppling av felsig-30 nalen för att integreras bara dä styrkan av förstärk-ningskontrollsignalen överskrider en annan i förväg bestämd tröskel.
6. En förstärkningskontrollanordning enligt patentkrav 1, kännetecknad därav, att nedkon- . 35 vertern (20) innefattar: '· en blandare (60), vilken innefattar en första ingängsport för mottagning av avgängssignalen; och 112740 33 en lokal oscillator (64), vilken är kopplad tili en andra ingäng av blandaren (60) och vars frekvens väljs sä att avgängssignalens medelfrekvens arrangeras tili basbandets frekvensoffset med en i förväg bestämd 5 marginal frän basbandets DC frekvens.
7. En förstärkningskontrollanordning enligt patentkrav 6, kännetecknad därav, att nedkon-vertern (20) innefattar en offset-modulatorkrets (260) för ändrande av frekvensen av den lokala oscillatorn 10 (64) för ändrande av en i förväg bestämd marginal, med vilken avgängssignalens medelfrekvens arrangeras i förhällande tili basbandets DC-frekvens.
8. En förstärkningskontrollanordning enligt patentkrav 7, kännetecknad därav, att nedkon- 15 vertern (20) innefattar en blandare (60), vilken är kopplad tili avgängsporten av den reglerbara förstär-karen (18) och vilken nedkonverterar avgängssignalen tili basbandets I och Q signalkomponenter.
9. En förstärkningskontrollanordning enligt 20 patentkrav 8, kännetecknad därav, att DC genomföringssänkningsslingan (200) innefattar ett för-sta och ett andra lägpassfilter (76, 78) för I respek-tive Q komponenterna.
: 10. Förfarande för automatisk kontroll av ,* 25 förstärkning genom att använda en reglerbar förstärka- re, vilken innefattar en ingängsport, vilken mottar en ingängssignal, en kontrollport, vilken mottar en kon-trollsignal och en avgängsport för givande av en av-gängssignal, vid vilket förfarande: 30 avgängssignalens frekvens nedkonverteras tili en basbandsfrekvens för bildande av en basbandssignal, väri avgängssignalens bärfrekvens arrangeras tili basbandets frekvensoffset med en i förväg bestämd marginal frän DC; 35 den mottagna effektsignalen genereras baserande pä effekten av den kompenserade basbandssignalen; kännetecknat därav, att 112740 34 DC genomföringssignalerna sanks bifogande bas-bandssignalerna sä, att en kompenserad basbandssignal astadkoms; och skillnaden mellan den mottagna effektsignalen och 5 referenssignalen integreras alternativt baserande pä värden av fel- och förstärkningskontrollsignalerna. > t ^ t * t » i t
FI956286A 1994-04-28 1995-12-27 Förfarande och anordning för reglering av automatisk förstärkning och eliminering av DC-offset i en kvadraturmottagare FI112740B (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US23581294A 1994-04-28 1994-04-28
US23581294 1994-04-28
PCT/US1995/005257 WO1995030275A1 (en) 1994-04-28 1995-04-28 Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver
US9505257 1995-04-28

Publications (3)

Publication Number Publication Date
FI956286A0 FI956286A0 (sv) 1995-12-27
FI956286A FI956286A (sv) 1996-02-26
FI112740B true FI112740B (sv) 2003-12-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
FI956286A FI112740B (sv) 1994-04-28 1995-12-27 Förfarande och anordning för reglering av automatisk förstärkning och eliminering av DC-offset i en kvadraturmottagare

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Country Link
US (1) US5617060A (sv)
EP (1) EP0706730B1 (sv)
JP (1) JP3021662B2 (sv)
KR (1) KR100329673B1 (sv)
CN (1) CN1068471C (sv)
AT (1) ATE164974T1 (sv)
AU (1) AU694514B2 (sv)
BR (1) BR9506205A (sv)
CA (1) CA2163883C (sv)
DE (1) DE69501996T2 (sv)
DK (1) DK0706730T3 (sv)
ES (1) ES2115380T3 (sv)
FI (1) FI112740B (sv)
HK (1) HK1005920A1 (sv)
IL (1) IL113479A (sv)
MY (1) MY113706A (sv)
RU (2) RU2156538C2 (sv)
TW (1) TW283277B (sv)
WO (1) WO1995030275A1 (sv)
ZA (1) ZA95605B (sv)

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