FI104449B - Mottagare - Google Patents

Mottagare Download PDF

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Publication number
FI104449B
FI104449B FI915331A FI915331A FI104449B FI 104449 B FI104449 B FI 104449B FI 915331 A FI915331 A FI 915331A FI 915331 A FI915331 A FI 915331A FI 104449 B FI104449 B FI 104449B
Authority
FI
Finland
Prior art keywords
signal
digital
output
frequency
phase
Prior art date
Application number
FI915331A
Other languages
English (en)
Finnish (fi)
Other versions
FI915331A (fi
FI915331A0 (fi
Inventor
Gerardus Christiaan Mar Gielis
Der Plassche Rudy Johan Van
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of FI915331A0 publication Critical patent/FI915331A0/fi
Publication of FI915331A publication Critical patent/FI915331A/fi
Application granted granted Critical
Publication of FI104449B publication Critical patent/FI104449B/sv

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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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0092—Measures to linearise or reduce distortion of oscillator characteristics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B23/00—Generation of oscillations periodically swept over a predetermined frequency range
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B28/00—Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • 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
    • H03D2200/0054—Digital filters
    • 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
    • H03D3/006—Demodulation of angle-, frequency- or phase- modulated oscillations by sampling the oscillations and further processing the samples, e.g. by computing techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D5/00—Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will
    • 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

Claims (10)

1. Mottagare omfattande en A/D-omvandlare (5) för digital sampling av en analog signal modulerad pä en bär- 5 frekvens vid en första sampelfrekvens, och kopplad till ett digitalt kvadraturblandarsteg (6, 9) för bärfrek- vensväxling i den digiterade modulerade signalen frän A/D- omvandlaren (5), varvid det digitala kvadraturblandarste- get är försett med första och andra signalutgängar {19, 10 20) , via vilka det matar ett par bärfrekvensomvandlade faskvadratursignaler, en digital filteranordning (10, 11) för vai av faskvadratursignalerna frän kvadraturblan- darsteget och för decimering av samplingsfrekvensen frän nämnda första samplingsfrekvens till en andra samplings- 15 frekvens, och en digital demoduleringsanordning (12, 13), som är kopplad till den digitala filteranordningen, kännetecknad av att det digitala kvadratur- blandarsteget omfattar en första digital koordinatrota- tionsdator (Cordic) (9) i rotationsmod med minst en första 20 signalingäng (16, 17) kopplad till en utgäng hos A/D- omvandlaren (5) och en fassignalingäng (18) som är kopplad till en utgäng hos en digital sägtandsgenerator (SG), vil- : ken digitala sägtandsgenerator matar en periodisk digital : sägtandsformad fassignal till nämnda dators fassignal- • · : 25 ingäng för en periodisk 2n-fasrotation av ätminstone den • « · ....: signal som matats till datorn via den första signalingäng- en med en upprepningsfrekvens lika med storleken av nämnda • · o bärfrekvensväxling, varvid nämnda dator vid de första och andra signalutgängarna (19, 20) matar nämnda par bärfre- • · *·|#* 30 kvenskonverterade faskvadratursignaler till den digitala *·* f ilteranordningen (10, 11).
·:· 2. Mottagare enligt patentkrav 1, kanne- tecknad av att upprepningsf rekvensen för den perio-diska digitala sägtandsformade fassignalen varierar inom 35 ett omräde som motsvarar mottagarens frekvensmottagnings- '...· omräde. 104449 33
3. Mottagare enligt patentkrav 1 eller 2, k ä n - netecknad av att upprepningsfrekvensen för den digitala sägtandsgeneratorns periodiska digitala sägtands-formade fassignal är lika stor som frekvensen för den ana- 5 loga signalen som matas till A/D-omvandlaren för frekven-somvandling i datorn direkt pä basband.
4 I « - • V 25 trotationsdator (CORDIC) med första och andra signal- • · - ;#j j ingängar, tili vilka den digitala filteranordningens valda ·;··: faskvadratursignaler matas vid en andra sampelf rekvens, och en utgäng kopplad tili signalupprepningsanordningen. :
4. Mottagare enligt patentkrav 1 eller 2, k ä n - netecknad av att upprepningsfrekvensen för den periodiska digitala sägtandsformade fassignalen avviker ! 10 med ett fast mellanfrekvensvärde frän bärfrekvensen för ; den analogs signal som matats till A/D-omvandlaren.
5. Mottagare enligt nägot av de föregäende patent- kraven, kännetecknad av att fasrotationen som ; förorsakats av den periodiska digitala sägtandsformade 15 fassignalen varierar linjärt inom 2n-radianomradet under : varje period.
6. Mottagare enligt nägot av de föregäende patent- ' kraven, kännetecknad av att den första sampel-frekvensen är ett icke-heltal gänger bärfrekvensen för den 20 tili A/D-omvandlaren matade analoga signalen, vilket tai är större än tvä. :
7. Mottagare enligt nägot av de föregäende patent- kraven, kännetecknad av att den digitala demo- ‘ 4 4 1 - : duleringsanordningen omfattar en andra digital koordina-
8. Mottagare enligt patentkrav 7 för mottagning av /
30 FM-signaler, kännetecknad av att den andra di- 2 » · · · gitala koordinatrotationsdatorns (CORDIC) utgäng är en r · · \ fassignalutgäng och är kopplad tili signalupprepningsan- ^ ordningen via en deriveringskrets.
9. Mottagare enligt patentkrav 7 för mottagning av ΐ '•\'m 35 AM-signaler, kännetecknad av att utgängen är « · — !.! den andra digitala koordinatrotationsdatorns (Cordic) ut- • · • · 104449 34 gang, till vilken mätäs en utgängssignal, som varierar en-ligt amplituden för den andra datorns ingängssignaler, varvid den första signalutgängen är kopplad till signal-upprepningsanordningen via en amplituddetektor.
10. Mottagare enligt nägot av de föregäende pa- tentkraven, kännetecknad av att den första di-gitala koordinatrotationsdatorn har en andra signalingäng, när en Hilbert-signalomvandling utförs mellan A/D-omvand-laren och en av de tvä signalingängarna och en signalför-10 dröjningskompensering utförs mellan A/D-omvandlaren och den andra signalingängen. I f I I · I • · • · • · · • · · • ·· · • · f·· • · · • · · ·· ♦ • · * • · · Mt • · · I · · 4
FI915331A 1990-11-15 1991-11-12 Mottagare FI104449B (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9002489A NL9002489A (nl) 1990-11-15 1990-11-15 Ontvanger.
NL9002489 1990-11-15

Publications (3)

Publication Number Publication Date
FI915331A0 FI915331A0 (fi) 1991-11-12
FI915331A FI915331A (fi) 1992-05-16
FI104449B true FI104449B (sv) 2000-01-31

Family

ID=19857981

Family Applications (1)

Application Number Title Priority Date Filing Date
FI915331A FI104449B (sv) 1990-11-15 1991-11-12 Mottagare

Country Status (9)

Country Link
US (1) US5230011A (sv)
EP (1) EP0486095B1 (sv)
JP (1) JP3181645B2 (sv)
KR (1) KR100209386B1 (sv)
AT (1) ATE148963T1 (sv)
DE (1) DE69124663T2 (sv)
ES (1) ES2100203T3 (sv)
FI (1) FI104449B (sv)
NL (1) NL9002489A (sv)

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Also Published As

Publication number Publication date
DE69124663D1 (de) 1997-03-27
EP0486095A1 (en) 1992-05-20
US5230011A (en) 1993-07-20
ES2100203T3 (es) 1997-06-16
DE69124663T2 (de) 1997-07-31
JPH0637664A (ja) 1994-02-10
KR100209386B1 (ko) 1999-07-15
KR920011140A (ko) 1992-06-27
NL9002489A (nl) 1992-06-01
ATE148963T1 (de) 1997-02-15
JP3181645B2 (ja) 2001-07-03
FI915331A (fi) 1992-05-16
EP0486095B1 (en) 1997-02-12
FI915331A0 (fi) 1991-11-12

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