JPH0150151B2 - - Google Patents
Info
- Publication number
- JPH0150151B2 JPH0150151B2 JP55171248A JP17124880A JPH0150151B2 JP H0150151 B2 JPH0150151 B2 JP H0150151B2 JP 55171248 A JP55171248 A JP 55171248A JP 17124880 A JP17124880 A JP 17124880A JP H0150151 B2 JPH0150151 B2 JP H0150151B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- input signal
- frequency
- window function
- angular frequency
- 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
- 238000001514 detection method Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 4
- 238000000034 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
- H04Q1/4575—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 which are transmitted in digital form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55171248A JPS5795746A (en) | 1980-12-04 | 1980-12-04 | Receiver for multifrequency signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55171248A JPS5795746A (en) | 1980-12-04 | 1980-12-04 | Receiver for multifrequency signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5795746A JPS5795746A (en) | 1982-06-14 |
JPH0150151B2 true JPH0150151B2 (es) | 1989-10-27 |
Family
ID=15919790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55171248A Granted JPS5795746A (en) | 1980-12-04 | 1980-12-04 | Receiver for multifrequency signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5795746A (es) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0440028A3 (en) * | 1990-01-29 | 1992-07-22 | Dialogic Corporation | Multifrequency tone signal detector |
DE59209341D1 (de) * | 1991-02-01 | 1998-07-02 | Blaupunkt Werke Gmbh | Verfahren zur Überbrückung von Audiosignalunterbrechungen |
US5442696A (en) * | 1991-12-31 | 1995-08-15 | At&T Corp. | Method and apparatus for detecting control signals |
-
1980
- 1980-12-04 JP JP55171248A patent/JPS5795746A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5795746A (en) | 1982-06-14 |
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