DE3672711D1 - Ueberwachungstonerkennung. - Google Patents

Ueberwachungstonerkennung.

Info

Publication number
DE3672711D1
DE3672711D1 DE8686900970T DE3672711T DE3672711D1 DE 3672711 D1 DE3672711 D1 DE 3672711D1 DE 8686900970 T DE8686900970 T DE 8686900970T DE 3672711 T DE3672711 T DE 3672711T DE 3672711 D1 DE3672711 D1 DE 3672711D1
Authority
DE
Germany
Prior art keywords
sound detection
monitoring sound
monitoring
detection
sound
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 - Lifetime
Application number
DE8686900970T
Other languages
English (en)
Inventor
Ross Mcpherson
Frank Smolik
James Thomson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24803881&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3672711(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Application granted granted Critical
Publication of DE3672711D1 publication Critical patent/DE3672711D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Complex Calculations (AREA)
DE8686900970T 1985-02-04 1986-01-23 Ueberwachungstonerkennung. Expired - Lifetime DE3672711D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/698,095 US4698769A (en) 1985-02-04 1985-02-04 Supervisory audio tone detection in a radio channel
PCT/US1986/000110 WO1986004762A1 (en) 1985-02-04 1986-01-23 Supervisory audio tone detection in a radio channel

Publications (1)

Publication Number Publication Date
DE3672711D1 true DE3672711D1 (de) 1990-08-23

Family

ID=24803881

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686900970T Expired - Lifetime DE3672711D1 (de) 1985-02-04 1986-01-23 Ueberwachungstonerkennung.

Country Status (6)

Country Link
US (1) US4698769A (de)
EP (1) EP0211865B2 (de)
JP (1) JP2721498B2 (de)
CA (1) CA1250024A (de)
DE (1) DE3672711D1 (de)
WO (1) WO1986004762A1 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791600A (en) * 1986-07-28 1988-12-13 Tektronix, Inc. Digital pipelined heterodyne circuit
US4965761A (en) * 1988-06-03 1990-10-23 General Dynamics Corporation, Pomona Div. Fast discrete fourier transform apparatus and method
FI87026C (fi) * 1989-12-01 1992-11-10 Nokia Mobile Phones Ltd Pao en digital faslaosningskrets baserad frekvensdetektor
US5001742A (en) * 1990-01-29 1991-03-19 At&T Bell Laboratories Baseband signal processing unit and method of operating the same
US5367539A (en) * 1991-12-31 1994-11-22 At&T Bell Laboratories Digital block processor for processing a plurality of transmission channels in a wireless radiotelephony system
CA2101501A1 (en) * 1992-09-21 1994-03-22 Robert Chuenlin Wang Method and apparatus for detecting a supervisory audio tone
US6181739B1 (en) * 1995-11-22 2001-01-30 Telefonaktiebolaget Lm Ericsson (Publ) Signal-to-noise ratio determination using digital signal processing
US5953660A (en) * 1995-11-22 1999-09-14 Telefonaktiebolaget Lm Ericsson Supervisory audio tone detection using digital signal processing
US6236838B1 (en) * 1997-06-03 2001-05-22 Texas Instruments Incorporated System for superresolution based estimation of control signals in a communications system
CA2225231C (en) * 1997-12-19 2004-03-02 Rui R. Wang Tone detection using discrete fourier transform techniques
DE10055375A1 (de) * 2000-11-08 2002-05-23 Infineon Technologies Ag Auswerteschaltung für Wechselspannungsimpulse
US6965068B2 (en) * 2000-12-27 2005-11-15 National Instruments Corporation System and method for estimating tones in an input signal
US6775629B2 (en) * 2001-06-12 2004-08-10 National Instruments Corporation System and method for estimating one or more tones in an input signal
US6721673B2 (en) 2001-06-12 2004-04-13 National Instruments Corporation Estimating a plurality of tones in an input signal
US7437396B2 (en) * 2004-03-31 2008-10-14 Intel Corporation Apparatus and method for generating transforms
US8438204B2 (en) * 2008-12-18 2013-05-07 Lsi Corporation Apparatus for calculating an N-point discrete fourier transform
KR101551346B1 (ko) * 2014-05-13 2015-09-08 주식회사 이노와이어리스 인접 셀 간에 사이드 로브 신호 제거를 위한 적응적 간섭 제거 장치

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147770B1 (de) * 1971-04-27 1974-06-21 Thomson Csf
CH553523A (de) * 1972-12-22 1974-08-30 Baumann Ernst Verfahren und einrichtung zum empfang von mehrfrequenzcodesignalen.
GB1482629A (en) * 1973-09-11 1977-08-10 Trend Communications Ltd Tone detectors
FR2299769A1 (fr) * 1975-01-31 1976-08-27 Telecommunications Sa Procede d'application
US4021653A (en) * 1975-10-14 1977-05-03 Motorola, Inc. Digital programmable tone detector
US4025853A (en) * 1976-02-12 1977-05-24 Bell Telephone Laboratories, Incorporated Method and apparatus for radio system cochannel interference suppression
US4075630A (en) * 1976-09-01 1978-02-21 Raytheon Company Signal processor
US4310722A (en) * 1978-11-09 1982-01-12 Bell Telephone Laboratories, Incorporated Mobile radiotelephone station two-way ranging system
US4266279A (en) * 1979-03-29 1981-05-05 Motorola, Inc. Memory system for a Doppler radar incorporating a fast Fourier transform computer
US4302817A (en) * 1980-02-14 1981-11-24 Motorola, Inc. Digital Pseudo continuous tone detector
DE3118473A1 (de) * 1981-05-09 1982-11-25 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren zur aufbereitung elektrischer signale mit einer digitalen filteranordnung
US4519084A (en) * 1982-09-29 1985-05-21 At&T Bell Laboratories Matched filter for combating multipath fading
US4535417A (en) * 1982-12-23 1985-08-13 Standard Oil Company Method and apparatus for digital time-variant filtering
US4534043A (en) * 1983-06-27 1985-08-06 Racal Data Communications, Inc. Test tone detector apparatus and method modem using same

Also Published As

Publication number Publication date
EP0211865A1 (de) 1987-03-04
CA1250024A (en) 1989-02-14
EP0211865B1 (de) 1990-07-18
JP2721498B2 (ja) 1998-03-04
EP0211865B2 (de) 1994-11-30
US4698769A (en) 1987-10-06
JPS62501669A (ja) 1987-07-02
WO1986004762A1 (en) 1986-08-14

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8328 Change in the person/name/address of the agent

Free format text: BLUMBACH, KRAMER & PARTNER, 65193 WIESBADEN