FR2162549A1 - - Google Patents
Info
- Publication number
- FR2162549A1 FR2162549A1 FR7243598A FR7243598A FR2162549A1 FR 2162549 A1 FR2162549 A1 FR 2162549A1 FR 7243598 A FR7243598 A FR 7243598A FR 7243598 A FR7243598 A FR 7243598A FR 2162549 A1 FR2162549 A1 FR 2162549A1
- Authority
- FR
- France
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP46099646A JPS4864813A (fr) | 1971-12-08 | 1971-12-08 | |
JP3898272A JPS492417A (fr) | 1972-04-18 | 1972-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2162549A1 true FR2162549A1 (fr) | 1973-07-20 |
Family
ID=26378296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7243598A Withdrawn FR2162549A1 (fr) | 1971-12-08 | 1972-12-07 |
Country Status (3)
Country | Link |
---|---|
US (1) | US3827052A (fr) |
FR (1) | FR2162549A1 (fr) |
GB (1) | GB1364808A (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7407717A (nl) * | 1974-06-10 | 1975-12-12 | Philips Nv | Radiotelefoniesysteem. |
IT1060726B (it) * | 1975-01-11 | 1982-08-20 | Chiba Communications Ind | Telecomunicazioni simultanee frastazioni radio |
NL7511562A (nl) * | 1975-02-05 | 1976-08-09 | Chiba Communications Ind | Radiocommunicatie-stelsel met mogelijkheid van gelijktijdige communicatie tussen radioposten. |
US4132983A (en) * | 1976-01-12 | 1979-01-02 | Royal Industries, Inc. | Radio synchronized warning light system |
US4140973A (en) * | 1977-03-29 | 1979-02-20 | Canadian Patents And Development Limited | Channel evaluation apparatus for point-to-point communications systems |
US4267592A (en) * | 1979-03-30 | 1981-05-12 | Rockwell International Corporation | Anti-jam radio |
US4287588A (en) * | 1979-04-12 | 1981-09-01 | The United States Of America As Represented By The Secretary Of The Army | Multiple access, time-division multiplex, satellite communications system |
GB2109197B (en) * | 1981-10-13 | 1985-12-04 | Standard Telephones Cables Ltd | Radio system |
US4531208A (en) * | 1982-02-24 | 1985-07-23 | Rca Corporation | Apparatus and method for reducing telephone channel power loading |
SE453449B (sv) * | 1982-07-06 | 1988-02-01 | Ericsson Telefon Ab L M | Anleggning for tradlos overforing av telefonsamtal |
US4644524A (en) * | 1985-01-22 | 1987-02-17 | Emery David L | Simultaneous communication system using time delays |
US4675863A (en) | 1985-03-20 | 1987-06-23 | International Mobile Machines Corp. | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
US4839923A (en) * | 1986-12-12 | 1989-06-13 | Motorola, Inc. | Method and apparatus for time companding an analog signal |
US5058202A (en) * | 1989-08-25 | 1991-10-15 | Amaf Industries, Inc. | System and method of transmitting and receiving a licompex modulated signal over a communication channel utilizing frequency modulation techniques |
US5546383A (en) | 1993-09-30 | 1996-08-13 | Cooley; David M. | Modularly clustered radiotelephone system |
GB2362292B (en) * | 2000-05-08 | 2003-01-22 | Motorola Israel Ltd | A radio communications transceiver and a communications method using the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE223957A (fr) * | 1923-07-17 | 1900-01-01 | ||
US2498635A (en) * | 1947-05-21 | 1950-02-28 | Int Standard Electric Corp | Duplex radio system |
FR1061604A (fr) * | 1948-07-09 | 1954-04-14 | Système de réduction de la bande de fréquences occupée par une transmission téléphonique | |
US2987614A (en) * | 1952-02-06 | 1961-06-06 | Claudius H M Roberts | Secrecy voice radio communication system |
US3150374A (en) * | 1959-06-25 | 1964-09-22 | David E Sunstein | Multichannel signaling system and method |
-
1972
- 1972-12-05 GB GB5606672A patent/GB1364808A/en not_active Expired
- 1972-12-06 US US00312778A patent/US3827052A/en not_active Expired - Lifetime
- 1972-12-07 FR FR7243598A patent/FR2162549A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB1364808A (en) | 1974-08-29 |
US3827052A (en) | 1974-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |