NL253281A - - Google Patents
Info
- Publication number
- NL253281A NL253281A NL253281DA NL253281A NL 253281 A NL253281 A NL 253281A NL 253281D A NL253281D A NL 253281DA NL 253281 A NL253281 A NL 253281A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR799131A FR1238414A (fr) | 1959-07-02 | 1959-07-02 | Perfectionnements aux liaisons troposphériques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL253281A true NL253281A (sv) |
Family
ID=8716719
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL130063D NL130063C (sv) | 1959-07-02 | ||
| NL253281D NL253281A (sv) | 1959-07-02 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL130063D NL130063C (sv) | 1959-07-02 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3160813A (sv) |
| DE (1) | DE1123718B (sv) |
| FR (1) | FR1238414A (sv) |
| GB (1) | GB905128A (sv) |
| NL (2) | NL253281A (sv) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1322204A (fr) * | 1962-02-06 | 1963-03-29 | Thomson Houston Comp Francaise | Perfectionnements aux faisceaux hertziens à modulation de fréquence |
| US3443228A (en) * | 1965-11-22 | 1969-05-06 | Gen Atronics Corp | Optimum frequency communication system with different test frequencies in different test intervals |
| US3543161A (en) * | 1966-10-13 | 1970-11-24 | Nat Defence Canada | Communication evaluation system |
| US3532988A (en) * | 1969-01-23 | 1970-10-06 | Motorola Inc | Digital troposcatter multiplex communication system optimum frequency |
| US3617891A (en) * | 1969-05-26 | 1971-11-02 | Emi Electronics Canada | Optimum frequency determining radio communication system |
| US3806819A (en) * | 1970-05-15 | 1974-04-23 | Co Ind Telecommunications Cit | Receiver including means selecting interference free channels |
| US3676778A (en) * | 1970-08-20 | 1972-07-11 | Nippon Telegraph & Telephone | Satellite communication system |
| US4197500A (en) * | 1976-11-01 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Army | Automatic channel selection |
| FR2383560A1 (fr) * | 1977-03-09 | 1978-10-06 | Trt Telecom Radio Electr | Dispositif de commande de recherche de frequence dans un recepteur radioelectrique mobile par rapport a des stations emettrices |
| US4140973A (en) * | 1977-03-29 | 1979-02-20 | Canadian Patents And Development Limited | Channel evaluation apparatus for point-to-point communications systems |
| US4334322A (en) * | 1979-10-26 | 1982-06-08 | E-Systems, Inc. | Communication management system for providing antijam/privacy capabilities for voice radio communications |
| CA1157525A (en) * | 1980-03-08 | 1983-11-22 | Majid Sepehri | Receiver for a frequency diversity radio communications system comprising interference assessment circuit and adaptive filter |
| US4309773A (en) * | 1980-04-18 | 1982-01-05 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus and method for radio channel selection |
| US4328581A (en) * | 1980-06-20 | 1982-05-04 | Rockwell International Corporation | Adaptive HF communication system |
| GB2253971B (en) * | 1984-10-30 | 1993-02-03 | Secr Defence | Improvements in or relating to ionospheric sounding |
| US4679048A (en) * | 1985-04-25 | 1987-07-07 | Grumman Aerospace Corporation | Adaptive spread spectrum radar |
| US4881221A (en) * | 1988-06-23 | 1989-11-14 | Kentrox Industries, Inc. | Method and apparatus for disabling an echo canceller on a digital telecommunications network |
| FR2641148B1 (sv) * | 1988-12-23 | 1992-05-22 | Trt Telecom Radio Electr |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE433020A (sv) * | 1938-03-02 | |||
| US2521696A (en) * | 1949-01-24 | 1950-09-12 | Armond James K De | Optimum frequency radio communication system |
| US2694140A (en) * | 1951-11-24 | 1954-11-09 | Bell Telephone Labor Inc | Selection of low interference radio channels |
| US3054895A (en) * | 1954-01-26 | 1962-09-18 | Forsyth Peter Allan | Beyond-the-horizon communication system utilizing signal strength controlled scatterpropagation |
| FR1147324A (fr) * | 1956-04-09 | 1957-11-21 | Csf | Perfectionnements aux liaisons radioélectriques à grande distance et ultra-haute fréquence |
| US2967908A (en) * | 1959-04-28 | 1961-01-10 | Itt | Telegraph communication systems with carrier monitoring |
-
0
- NL NL130063D patent/NL130063C/xx active
- NL NL253281D patent/NL253281A/xx unknown
-
1959
- 1959-07-02 FR FR799131A patent/FR1238414A/fr not_active Expired
-
1960
- 1960-06-15 GB GB21093/60A patent/GB905128A/en not_active Expired
- 1960-06-17 US US36952A patent/US3160813A/en not_active Expired - Lifetime
- 1960-07-01 DE DEC21829A patent/DE1123718B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1123718B (de) | 1962-02-15 |
| NL130063C (sv) | |
| US3160813A (en) | 1964-12-08 |
| FR1238414A (fr) | 1960-08-12 |
| GB905128A (en) | 1962-09-05 |