GB1437205A - Digital equipment for forming a frequency multiplex system - Google Patents
Digital equipment for forming a frequency multiplex systemInfo
- Publication number
- GB1437205A GB1437205A GB3175373A GB3175373A GB1437205A GB 1437205 A GB1437205 A GB 1437205A GB 3175373 A GB3175373 A GB 3175373A GB 3175373 A GB3175373 A GB 3175373A GB 1437205 A GB1437205 A GB 1437205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- multiplied
- quadrature
- digital
- samples
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/04—Frequency-transposition arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/04—Frequency-transposition arrangements
- H04J1/05—Frequency-transposition arrangements using digital techniques
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Time-Division Multiplex Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7224032A FR2191826A5 (xx) | 1972-07-03 | 1972-07-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1437205A true GB1437205A (en) | 1976-05-26 |
Family
ID=9101270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3175373A Expired GB1437205A (en) | 1972-07-03 | 1973-07-03 | Digital equipment for forming a frequency multiplex system |
Country Status (9)
Country | Link |
---|---|
US (1) | US3875340A (xx) |
BE (1) | BE801780A (xx) |
DE (1) | DE2333870A1 (xx) |
FR (1) | FR2191826A5 (xx) |
GB (1) | GB1437205A (xx) |
IE (1) | IE37872B1 (xx) |
IT (1) | IT991652B (xx) |
LU (1) | LU67901A1 (xx) |
NL (1) | NL7309282A (xx) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4086536A (en) * | 1975-06-24 | 1978-04-25 | Honeywell Inc. | Single sideband transmitter apparatus |
US4001510A (en) * | 1975-07-07 | 1977-01-04 | Motorola, Inc. | Digital modulator and demodulator system for fdm telephony |
US4316282A (en) * | 1979-11-23 | 1982-02-16 | Rca Corporation | Multichannel frequency translation of sampled waveforms by decimation and interpolation |
DE3120445A1 (de) * | 1981-05-22 | 1983-05-26 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | Verfahren zur frequenzvertausch von teilbaendern |
JPS6259432A (ja) * | 1985-09-10 | 1987-03-16 | Nec Corp | Fdm/tdm相互変換方式 |
DE3626862A1 (de) * | 1986-08-08 | 1988-02-11 | Philips Patentverwaltung | Mehrstufige sender- antennenkoppeleinrichtung |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3676598A (en) * | 1970-06-08 | 1972-07-11 | Bell Telephone Labor Inc | Frequency division multiplex single-sideband modulation system |
-
1972
- 1972-07-03 FR FR7224032A patent/FR2191826A5/fr not_active Expired
-
1973
- 1973-06-29 LU LU67901A patent/LU67901A1/xx unknown
- 1973-07-02 IT IT68956/73A patent/IT991652B/it active
- 1973-07-02 BE BE1005208A patent/BE801780A/xx unknown
- 1973-07-03 DE DE19732333870 patent/DE2333870A1/de active Pending
- 1973-07-03 US US376169A patent/US3875340A/en not_active Expired - Lifetime
- 1973-07-03 IE IE1110/73A patent/IE37872B1/xx unknown
- 1973-07-03 GB GB3175373A patent/GB1437205A/en not_active Expired
- 1973-07-03 NL NL7309282A patent/NL7309282A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
US3875340A (en) | 1975-04-01 |
IE37872B1 (en) | 1977-11-09 |
DE2333870A1 (de) | 1974-01-17 |
IE37872L (en) | 1974-01-03 |
BE801780A (fr) | 1974-01-02 |
LU67901A1 (xx) | 1974-01-03 |
IT991652B (it) | 1975-08-30 |
NL7309282A (xx) | 1974-01-07 |
FR2191826A5 (xx) | 1974-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |