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GB2520695B - Scheme for identification of MTMF signals - Google Patents

Scheme for identification of MTMF signals

Info

Publication number
GB2520695B
GB2520695B GB1320940.8A GB201320940A GB2520695B GB 2520695 B GB2520695 B GB 2520695B GB 201320940 A GB201320940 A GB 201320940A GB 2520695 B GB2520695 B GB 2520695B
Authority
GB
United Kingdom
Prior art keywords
mtmf
identification
signals
scheme
mtmf signals
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.)
Active
Application number
GB1320940.8A
Other versions
GB2520695A (en
GB201320940D0 (en
Inventor
Keith John Jones
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.)
L3Harris TRL Technology Ltd
Original Assignee
TRL Technology Ltd
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 TRL Technology Ltd filed Critical TRL Technology Ltd
Priority to GB1320940.8A priority Critical patent/GB2520695B/en
Publication of GB201320940D0 publication Critical patent/GB201320940D0/en
Publication of GB2520695A publication Critical patent/GB2520695A/en
Application granted granted Critical
Publication of GB2520695B publication Critical patent/GB2520695B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0089—In-band signals
    • H04L2027/0093—Intermittant signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2676—Blind, i.e. without using known symbols

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB1320940.8A 2013-11-27 2013-11-27 Scheme for identification of MTMF signals Active GB2520695B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1320940.8A GB2520695B (en) 2013-11-27 2013-11-27 Scheme for identification of MTMF signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1320940.8A GB2520695B (en) 2013-11-27 2013-11-27 Scheme for identification of MTMF signals

Publications (3)

Publication Number Publication Date
GB201320940D0 GB201320940D0 (en) 2014-01-08
GB2520695A GB2520695A (en) 2015-06-03
GB2520695B true GB2520695B (en) 2015-11-18

Family

ID=49918289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1320940.8A Active GB2520695B (en) 2013-11-27 2013-11-27 Scheme for identification of MTMF signals

Country Status (1)

Country Link
GB (1) GB2520695B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113259029B (en) * 2021-05-04 2022-03-22 中国人民解放军32802部队 Real-time automatic detection and identification method suitable for unmanned aerial vehicle signals
CN113988143B (en) * 2021-12-27 2022-05-10 北京航空航天大学杭州创新研究院 An automatic identification method of bad sectors based on the measurement of brain magnetism by optical pump magnetometer
CN114582374B (en) * 2022-04-29 2022-07-05 北京百瑞互联技术有限公司 Dual-tone multi-frequency detection method, system, medium and equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325427A (en) * 1992-03-23 1994-06-28 At&T Bell Laboratories Apparatus and robust method for detecting tones
US5809453A (en) * 1995-01-25 1998-09-15 Dragon Systems Uk Limited Methods and apparatus for detecting harmonic structure in a waveform
US6229889B1 (en) * 1999-04-05 2001-05-08 Agere Systems Guardian Corp. Robust signaling tone frequency measurement
US20070116242A1 (en) * 2005-10-14 2007-05-24 Honeywell International, Inc. Method and apparatus for decoding dtmf tones

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325427A (en) * 1992-03-23 1994-06-28 At&T Bell Laboratories Apparatus and robust method for detecting tones
US5809453A (en) * 1995-01-25 1998-09-15 Dragon Systems Uk Limited Methods and apparatus for detecting harmonic structure in a waveform
US6229889B1 (en) * 1999-04-05 2001-05-08 Agere Systems Guardian Corp. Robust signaling tone frequency measurement
US20070116242A1 (en) * 2005-10-14 2007-05-24 Honeywell International, Inc. Method and apparatus for decoding dtmf tones

Also Published As

Publication number Publication date
GB2520695A (en) 2015-06-03
GB201320940D0 (en) 2014-01-08

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