ES8404130A1 - Aparato para identificar senales digitales de frecuencias multiples. - Google Patents
Aparato para identificar senales digitales de frecuencias multiples.Info
- Publication number
- ES8404130A1 ES8404130A1 ES521229A ES521229A ES8404130A1 ES 8404130 A1 ES8404130 A1 ES 8404130A1 ES 521229 A ES521229 A ES 521229A ES 521229 A ES521229 A ES 521229A ES 8404130 A1 ES8404130 A1 ES 8404130A1
- Authority
- ES
- Spain
- Prior art keywords
- signal
- receivers
- selective
- signals
- circuit
- 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
Links
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)
Abstract
APARATO PARA IDENTIFICAR SEÑALES DIGITALES DE FRECUENCIAS MULTIPLES.LA SEÑAL DE ENTRADA A LOS RECEPTORES (1...6) SE MULTIPLICA, EN CADA MOMENTO DE MUESTREO, POR SENDOS COEFICIENTES (8, 9). EL PRODUCTO DE LAS MULTIPLICACIONES ES ACUMULADO (12, 13) Y ELEVADO AL CUADRADO (14, 15), Y LOS RESULTADOS SE SUMAN (16) PARA OBTENER UNA MEDIDA DE LA ENERGIA DE SEÑAL DENTRO DE LA BANDA DE PESO. UNOS CIRCUITOS DE FILTRADO (17, 18, 28), SUMADORES (23), COMPARADORES (30), Y DE UMBRAL (29) DETERMINAN LAS SEÑALES QUE HAN DE INDICAR LA RECEPCION DE UNA SEÑAL DIGITAL DE MULTIFRECUENCIA.DEAPLICACION EN RECEPTORES DIGITALES DE MULTIFRECUENCIA.
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 (2)
Publication Number | Publication Date |
---|---|
ES8404130A1 true ES8404130A1 (es) | 1984-04-01 |
ES521229A0 ES521229A0 (es) | 1984-04-01 |
Family
ID=20346473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES521229A Granted ES521229A0 (es) | 1982-04-06 | 1983-04-05 | Aparato para identificar senales digitales de frecuencias multiples. |
Country Status (9)
Country | Link |
---|---|
US (1) | US4614909A (es) |
ES (1) | ES521229A0 (es) |
FI (1) | FI841600A0 (es) |
GB (1) | GB2135488B (es) |
IT (1) | IT8320471A0 (es) |
NL (1) | NL8320091A (es) |
NO (1) | NO834469L (es) |
SE (1) | SE430554B (es) |
WO (1) | WO1983003732A1 (es) |
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 (en) * | 1988-07-15 | 1990-01-25 | Luminis Pty. Ltd. | Access protection and priority control in distributed queueing |
DE4032369C1 (es) * | 1990-10-12 | 1992-01-30 | Telenorma Gmbh, 6000 Frankfurt, De | |
CA2116043C (en) * | 1994-02-21 | 1997-09-23 | Alexander F. Tulai | Programmable digital call progress tone detector |
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 (en) * | 1979-05-22 | 1982-12-14 | Masaharu Kawaguchi | Digital multi-frequency receiver |
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 NL NL8320091A patent/NL8320091A/nl unknown
- 1983-03-25 GB GB08409831A patent/GB2135488B/en not_active Expired
- 1983-03-25 WO PCT/SE1983/000107 patent/WO1983003732A1/en active Application Filing
- 1983-04-05 ES ES521229A patent/ES521229A0/es active Granted
- 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 |
SE8202191L (sv) | 1983-10-07 |
GB2135488B (en) | 1985-08-07 |
NL8320091A (nl) | 1984-07-02 |
NO834469L (no) | 1983-12-05 |
GB2135488A (en) | 1984-08-30 |
GB8409831D0 (en) | 1984-05-23 |
IT8320471A0 (it) | 1983-04-06 |
WO1983003732A1 (en) | 1983-10-27 |
US4614909A (en) | 1986-09-30 |
ES521229A0 (es) | 1984-04-01 |
FI841600A (fi) | 1984-04-24 |
FI841600A0 (fi) | 1984-04-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19971001 |