CA2124114C - Demodulateur numerique - Google Patents
Demodulateur numeriqueInfo
- Publication number
- CA2124114C CA2124114C CA 2124114 CA2124114A CA2124114C CA 2124114 C CA2124114 C CA 2124114C CA 2124114 CA2124114 CA 2124114 CA 2124114 A CA2124114 A CA 2124114A CA 2124114 C CA2124114 C CA 2124114C
- Authority
- CA
- Canada
- Prior art keywords
- sequence
- values
- period
- zero
- signal
- 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 - Fee Related
Links
- 230000004044 response Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 78
- 238000001914 filtration Methods 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 16
- 238000012935 Averaging Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 9
- 230000003190 augmentative effect Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims 4
- 230000008569 process Effects 0.000 description 13
- 230000006870 function Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000013139 quantization Methods 0.000 description 7
- 238000013459 approach Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
- H03D3/04—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by counting or integrating cycles of oscillations
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
- H03K9/06—Demodulating pulses which have been modulated with a continuously-variable signal of frequency- or rate-modulated pulses
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
- H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
Démodulateur numérique pour signaux à modulation de fréquence, à modulation d'impulsions en largeur et à modulation temporelle d'un autre type, utilisant un détecteur de signe (14) pour déterminer les passages par zéro du signal modulé. Les périodes entre les passages par zéro sont déterminées par au moins un circuit de porte (16, 18) et par au moins un compteur (22, 24) qui compte les impulsions d'horloge à partir d'une horloge rapide (20) déclenchée par le circuit gâchette en réaction aux passages par zéro. Les informations relatives aux périodes sont converties en un signal démodulé par un processeur numérique (12), ou par un processeur de signaux (12') ou par un convertisseur analogique-numérique (12'').
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US794,150 | 1991-11-20 | ||
| US07/794,150 US5159281A (en) | 1991-11-20 | 1991-11-20 | Digital demodulator using numerical processor to evaluate period measurements |
| US875,848 | 1992-04-29 | ||
| US07/875,848 US5272448A (en) | 1991-11-20 | 1992-04-29 | Method and apparatus to perform digital demodulation by measuring periods between zero crossings |
| US900,367 | 1992-06-18 | ||
| US07/900,367 US5239273A (en) | 1991-11-20 | 1992-06-18 | Digital demodualtor using signal processor to evaluate period measurements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2124114A1 CA2124114A1 (fr) | 1993-05-27 |
| CA2124114C true CA2124114C (fr) | 1999-03-30 |
Family
ID=27419909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2124114 Expired - Fee Related CA2124114C (fr) | 1991-11-20 | 1992-11-17 | Demodulateur numerique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0613595A4 (fr) |
| JP (1) | JPH08500942A (fr) |
| KR (1) | KR100363288B1 (fr) |
| CA (1) | CA2124114C (fr) |
| WO (1) | WO1993010596A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101113902B1 (ko) | 2008-05-29 | 2012-03-02 | 에스케이텔레콤 주식회사 | 디지털 고주파 처리 기술과 영교차 기술을 이용한 근거리 무선 신호 수신장치 및 방법 |
| JP6212256B2 (ja) * | 2012-12-25 | 2017-10-11 | ダイヤモンド電機株式会社 | Ａｄ変換処理装置 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3548328A (en) * | 1969-01-13 | 1970-12-15 | Honeywell Inc | Digital fm discriminator |
| US4412339A (en) * | 1981-09-24 | 1983-10-25 | Advanced Micro Devices, Inc. | Zero-crossing interpolator to reduce isochronous distortion in a digital FSK modem |
| DE3223345A1 (de) * | 1982-06-23 | 1984-01-05 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Verfahren und anordnung zum demodulieren eines frequenzmodulierten eingangssignals |
| US4596022A (en) * | 1983-08-25 | 1986-06-17 | The Microperipheral Corporation | FSK data communication system |
| DE3373392D1 (en) * | 1983-12-24 | 1987-10-08 | Itt Ind Gmbh Deutsche | A digital demodulator for digitized frequency-modulated signals |
| EP0210292B1 (fr) * | 1985-07-27 | 1990-09-26 | Deutsche ITT Industries GmbH | Circuit de démodulation de fréquence avec comptage des passages par zéro |
| US4992748A (en) * | 1989-09-13 | 1991-02-12 | Atlantic Richfield Company | Period-inverting FM demodulator |
-
1992
- 1992-11-17 JP JP5509448A patent/JPH08500942A/ja active Pending
- 1992-11-17 EP EP92924443A patent/EP0613595A4/fr not_active Withdrawn
- 1992-11-17 WO PCT/US1992/009857 patent/WO1993010596A1/fr not_active Ceased
- 1992-11-17 CA CA 2124114 patent/CA2124114C/fr not_active Expired - Fee Related
-
1994
- 1994-05-20 KR KR10-1994-0701703A patent/KR100363288B1/ko not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1993010596A1 (fr) | 1993-05-27 |
| EP0613595A1 (fr) | 1994-09-07 |
| EP0613595A4 (fr) | 1995-01-18 |
| JPH08500942A (ja) | 1996-01-30 |
| KR100363288B1 (fr) | 2003-02-11 |
| CA2124114A1 (fr) | 1993-05-27 |
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|---|---|---|
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| US5239273A (en) | Digital demodualtor using signal processor to evaluate period measurements | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |