NO834469L - Apparat for aa identifisere digitale flerfrekvenssignaler - Google Patents
Apparat for aa identifisere digitale flerfrekvenssignalerInfo
- Publication number
- NO834469L NO834469L NO834469A NO834469A NO834469L NO 834469 L NO834469 L NO 834469L NO 834469 A NO834469 A NO 834469A NO 834469 A NO834469 A NO 834469A NO 834469 L NO834469 L NO 834469L
- Authority
- NO
- Norway
- Prior art keywords
- signal
- selective
- receiver
- signals
- receivers
- Prior art date
Links
- 238000005070 sampling Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims 1
- 230000006870 function Effects 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- MMOXZBCLCQITDF-UHFFFAOYSA-N N,N-diethyl-m-toluamide Chemical compound CCN(CC)C(=O)C1=CC=CC(C)=C1 MMOXZBCLCQITDF-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8202191A SE430554B (sv) | 1982-04-06 | 1982-04-06 | Anordning for att identifiera digitala flerfrekvenssignaler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO834469L true NO834469L (no) | 1983-12-05 |
Family
ID=20346473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO834469A NO834469L (no) | 1982-04-06 | 1983-12-05 | Apparat for aa identifisere digitale flerfrekvenssignaler |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4614909A (fr) |
| ES (1) | ES8404130A1 (fr) |
| FI (1) | FI841600A0 (fr) |
| GB (1) | GB2135488B (fr) |
| IT (1) | IT8320471A0 (fr) |
| NL (1) | NL8320091A (fr) |
| NO (1) | NO834469L (fr) |
| SE (1) | SE430554B (fr) |
| WO (1) | WO1983003732A1 (fr) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3505950A1 (de) * | 1985-02-21 | 1986-08-21 | Deutsche Itt Industries Gmbh, 7800 Freiburg | Integrierbare schaltungsanordnung zur identifizierung eines pilottones |
| NL8502008A (nl) * | 1985-07-12 | 1987-02-02 | Philips Nv | Ontvanginrichting voor het onder bescherming van een stoorsignaal/spraaksignaalbewakingsfunctie herkennen van een aantal verschillende en voorafbepaalde frequentiecombinaties van toonfrequente signaleringscomponenten. |
| US4759748A (en) * | 1986-06-30 | 1988-07-26 | Raychem Corporation | Guiding catheter |
| DE3629907A1 (de) * | 1986-09-03 | 1988-03-10 | Standard Elektrik Lorenz Ag | Signalisierungsempfaenger |
| US4853958A (en) * | 1988-06-02 | 1989-08-01 | Northern Telecom Limited | LPC-based DTMF receiver for secondary signalling |
| WO1990000841A1 (fr) * | 1988-07-15 | 1990-01-25 | Luminis Pty. Ltd. | Commande de protection et de priorite d'acces en file d'attente repartie |
| DE4032369C1 (fr) * | 1990-10-12 | 1992-01-30 | Telenorma Gmbh, 6000 Frankfurt, De | |
| CA2116043C (fr) * | 1994-02-21 | 1997-09-23 | Alexander F. Tulai | Detecteur de tonalites de progression d'appel numerique programmable |
| US5793306A (en) * | 1995-12-29 | 1998-08-11 | Vershinin; Michael | Identification systems employing frequency-based coded information |
| JPH09243679A (ja) * | 1996-03-05 | 1997-09-19 | Takayoshi Hirata | 任意区間波形を用いた非調和的周波数分析法 |
| US7317765B2 (en) * | 2002-11-26 | 2008-01-08 | The Johns Hopkins University | Signal observation system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
| US3935539A (en) * | 1974-04-08 | 1976-01-27 | The United States Of America As Represented By The Secretary Of The Navy | A-C signal multiplying circuit by a ratio of whole numbers the numerator of which is greater than one and greater than the denominator |
| US4142177A (en) * | 1976-08-12 | 1979-02-27 | Motorola, Inc. | Digital tone decoder system |
| US4145660A (en) * | 1977-12-23 | 1979-03-20 | Rca Corporation | Frequency activated circuit |
| US4230991A (en) * | 1978-09-11 | 1980-10-28 | Alexandre Paphitis | Digital frequency process and method using frequency shifting techniques, especially for low frequency measurements |
| JPS5830793B2 (ja) * | 1978-10-04 | 1983-07-01 | 株式会社日立製作所 | 多周波信号受信方式 |
| US4334273A (en) * | 1979-04-24 | 1982-06-08 | Kokusai Denshin Denwa Co., Ltd. | Signal processing system using a digital technique |
| NL177552C (nl) * | 1979-05-02 | 1985-10-01 | Nederlanden Staat | Inrichting voor het onder gebruikmaking van een digitale correlatiemethode vaststellen van de aanwezigheid van elke van een aantal vaste frequenties in een signaal. |
| CA1137565A (fr) * | 1979-05-22 | 1982-12-14 | Masaharu Kawaguchi | Recepteur multifrequence numerique |
| US4368434A (en) * | 1980-09-18 | 1983-01-11 | Codex Corporation | Programmable digital detector for the demodulation of angle modulated electrical signals |
| US4399536A (en) * | 1981-10-02 | 1983-08-16 | Bell Telephone Laboratories, Incorporated | Convolution filter arrangement for digital multifrequency receiver |
-
1982
- 1982-04-06 SE SE8202191A patent/SE430554B/sv unknown
-
1983
- 1983-03-25 WO PCT/SE1983/000107 patent/WO1983003732A1/fr active Application Filing
- 1983-03-25 NL NL8320091A patent/NL8320091A/nl unknown
- 1983-03-25 GB GB08409831A patent/GB2135488B/en not_active Expired
- 1983-04-05 ES ES521229A patent/ES8404130A1/es not_active Expired
- 1983-04-06 IT IT8320471A patent/IT8320471A0/it unknown
- 1983-11-23 US US06/558,420 patent/US4614909A/en not_active Expired - Lifetime
- 1983-12-05 NO NO834469A patent/NO834469L/no unknown
-
1984
- 1984-04-24 FI FI841600A patent/FI841600A0/fi not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE430554B (sv) | 1983-11-21 |
| FI841600A (fi) | 1984-04-24 |
| FI841600A0 (fi) | 1984-04-24 |
| ES521229A0 (es) | 1984-04-01 |
| ES8404130A1 (es) | 1984-04-01 |
| WO1983003732A1 (fr) | 1983-10-27 |
| IT8320471A0 (it) | 1983-04-06 |
| GB2135488A (en) | 1984-08-30 |
| GB2135488B (en) | 1985-08-07 |
| US4614909A (en) | 1986-09-30 |
| GB8409831D0 (en) | 1984-05-23 |
| NL8320091A (nl) | 1984-07-02 |
| SE8202191L (sv) | 1983-10-07 |
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