GB201320940D0 - Scheme for identification of MTMF signals - Google Patents
Scheme for identification of MTMF signalsInfo
- Publication number
- GB201320940D0 GB201320940D0 GB201320940A GB201320940A GB201320940D0 GB 201320940 D0 GB201320940 D0 GB 201320940D0 GB 201320940 A GB201320940 A GB 201320940A GB 201320940 A GB201320940 A GB 201320940A GB 201320940 D0 GB201320940 D0 GB 201320940D0
- 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.)
- Granted
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)
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 true GB201320940D0 (en) | 2014-01-08 |
GB2520695A GB2520695A (en) | 2015-06-03 |
GB2520695B 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) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113988143A (en) * | 2021-12-27 | 2022-01-28 | 北京航空航天大学杭州创新研究院 | Bad track automatic identification method based on optical pump magnetometer measurement brain magnetism |
CN114582374A (en) * | 2022-04-29 | 2022-06-03 | 北京百瑞互联技术有限公司 | Dual-tone multi-frequency detection method, system, medium and equipment |
Families Citing this family (1)
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 |
Family Cites Families (4)
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 |
GB2297465B (en) * | 1995-01-25 | 1999-04-28 | Dragon Syst Uk Ltd | 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 |
US7602902B2 (en) * | 2005-10-14 | 2009-10-13 | Honeywell International Inc. | Method and apparatus for decoding DTMF tones |
-
2013
- 2013-11-27 GB GB1320940.8A patent/GB2520695B/en active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113988143A (en) * | 2021-12-27 | 2022-01-28 | 北京航空航天大学杭州创新研究院 | Bad track automatic identification method based on optical pump magnetometer measurement brain magnetism |
CN114582374A (en) * | 2022-04-29 | 2022-06-03 | 北京百瑞互联技术有限公司 | Dual-tone multi-frequency detection method, system, medium and equipment |
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 |
Also Published As
Publication number | Publication date |
---|---|
GB2520695A (en) | 2015-06-03 |
GB2520695B (en) | 2015-11-18 |
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