CA1079857A - Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation - Google Patents
Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulationInfo
- Publication number
- CA1079857A CA1079857A CA238,132A CA238132A CA1079857A CA 1079857 A CA1079857 A CA 1079857A CA 238132 A CA238132 A CA 238132A CA 1079857 A CA1079857 A CA 1079857A
- Authority
- CA
- Canada
- Prior art keywords
- adder
- signal
- output
- register
- clock
- 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
- 230000009467 reduction Effects 0.000 title abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000015654 memory Effects 0.000 claims description 88
- 230000006870 function Effects 0.000 claims description 58
- 238000005070 sampling Methods 0.000 claims description 58
- 230000007704 transition Effects 0.000 claims description 38
- 239000000872 buffer Substances 0.000 claims description 32
- 230000000875 corresponding effect Effects 0.000 claims 24
- 239000000969 carrier Substances 0.000 claims 1
- 230000010363 phase shift Effects 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 description 17
- 230000008859 change Effects 0.000 description 15
- 238000007792 addition Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 11
- 241001163743 Perlodes Species 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000013459 approach Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 6
- 239000000306 component Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 2
- 241001481828 Glyptocephalus cynoglossus Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
- H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/02—Channels characterised by the type of signal
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (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 |
|---|---|---|---|
| CA337,344A CA1081848A (en) | 1974-11-21 | 1979-10-10 | Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/525,699 US3958191A (en) | 1974-11-21 | 1974-11-21 | Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1079857A true CA1079857A (en) | 1980-06-17 |
Family
ID=24094283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA238,132A Expired CA1079857A (en) | 1974-11-21 | 1975-10-20 | Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5429334B2 (enExample) |
| BR (1) | BR7507723A (enExample) |
| CA (1) | CA1079857A (enExample) |
| DE (1) | DE2542474C2 (enExample) |
| FR (1) | FR2292372A1 (enExample) |
| GB (3) | GB1488434A (enExample) |
| IT (1) | IT1042772B (enExample) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1075364A (en) * | 1975-11-26 | 1980-04-08 | David N. Sherman | Multiport programmable digital data set |
| US4142245A (en) * | 1977-08-22 | 1979-02-27 | Texas Instruments Incorporated | Multi-frequency digital wave synthesizer for providing analog output signals |
| GB2071966B (en) * | 1979-06-08 | 1983-10-26 | Ericsson Telefon Ab L M | Converter included in a phase modulator |
| US4320361A (en) * | 1979-07-20 | 1982-03-16 | Marconi Instruments Limited | Amplitude and frequency modulators using a switchable component controlled by data signals |
| FR2477801A1 (fr) * | 1980-03-05 | 1981-09-11 | Thomson Csf | Procede de modulation de phase par un signal binaire et dispositif mettant en oeuvre ce procede |
| AT377462B (de) * | 1981-06-20 | 1985-03-25 | Union Carbide Corp | Verfahren zum thermochemischen flaemmen eines metallischen werkstueckes |
| GB2116795A (en) * | 1982-03-02 | 1983-09-28 | Racal Mesl Microwave | Electrical signal generation |
| GB2160728A (en) * | 1984-06-21 | 1985-12-24 | Motorola Israel Ltd | Waveform synthesizer |
| DE3514664A1 (de) * | 1985-04-23 | 1986-10-30 | Josef Dipl.-Ing. Dirr (FH), 8000 München | Verfahren fuer eine codierung von daten durch die phase eines wechselstromes, insbesondere fuer fernmeldeanlagen |
| DE3716060C2 (de) * | 1987-05-14 | 1996-06-13 | Daimler Benz Aerospace Ag | Modulator zur Erzeugung eines frequenzumgetasteten HF-Signals |
| DE3716054C2 (de) * | 1987-05-14 | 1996-06-13 | Daimler Benz Aerospace Ag | Modulator |
| US4794621A (en) * | 1987-08-26 | 1988-12-27 | Josef Dirr | Apparatus for transmitting information by angle modulation |
| US4757519A (en) * | 1987-10-02 | 1988-07-12 | Hewlett-Packard | Digital premodulation filter |
| JPH03253151A (ja) * | 1990-03-02 | 1991-11-12 | Fujitsu Denso Ltd | 周波数シフト変調方法 |
| US5103459B1 (en) * | 1990-06-25 | 1999-07-06 | Qualcomm Inc | System and method for generating signal waveforms in a cdma cellular telephone system |
| GB2368244A (en) * | 2000-10-10 | 2002-04-24 | Seiko Epson Corp | Signal processor with look-up table for modulating data |
| TWM578052U (zh) * | 2018-11-14 | 2019-05-11 | 國家中山科學研究院 | Frequency shift button modulation and demodulation structure of communication transceiver |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3497625A (en) * | 1965-07-15 | 1970-02-24 | Sylvania Electric Prod | Digital modulation and demodulation in a communication system |
| US3633017A (en) * | 1970-01-07 | 1972-01-04 | Sperry Rand Corp | Digital waveform generator |
| FR2110845A5 (enExample) * | 1970-10-29 | 1972-06-02 | Ibm France | |
| US3697892A (en) * | 1971-02-19 | 1972-10-10 | Bell Telephone Labor Inc | Digital frequency-shift modulator using a read-only-memory |
| FR2208584A5 (enExample) * | 1972-11-29 | 1974-06-21 | Ibm France | |
| US3890581A (en) * | 1972-12-27 | 1975-06-17 | Rixon | Digital FM (FSK) modulator |
-
1975
- 1975-08-21 GB GB3055176A patent/GB1488434A/en not_active Expired
- 1975-08-21 GB GB3473075A patent/GB1488433A/en not_active Expired
- 1975-08-21 GB GB3055276A patent/GB1488435A/en not_active Expired
- 1975-09-23 IT IT2752675A patent/IT1042772B/it active
- 1975-09-24 DE DE19752542474 patent/DE2542474C2/de not_active Expired
- 1975-10-01 FR FR7530733A patent/FR2292372A1/fr active Granted
- 1975-10-20 CA CA238,132A patent/CA1079857A/en not_active Expired
- 1975-11-05 JP JP13221475A patent/JPS5429334B2/ja not_active Expired
- 1975-11-21 BR BR7507723A patent/BR7507723A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5171767A (enExample) | 1976-06-21 |
| DE2542474C2 (de) | 1983-02-24 |
| GB1488434A (en) | 1977-10-12 |
| GB1488433A (en) | 1977-10-12 |
| BR7507723A (pt) | 1976-08-10 |
| FR2292372B1 (enExample) | 1977-12-16 |
| DE2542474A1 (de) | 1976-05-26 |
| IT1042772B (it) | 1980-01-30 |
| FR2292372A1 (fr) | 1976-06-18 |
| GB1488435A (en) | 1977-10-12 |
| JPS5429334B2 (enExample) | 1979-09-22 |
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| JPH04502540A (ja) | 非整数ビット間隔に対処するデジタルｇｍｓｋ変調器 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |