JPS55133148A - Interference wave removal system - Google Patents
Interference wave removal systemInfo
- Publication number
- JPS55133148A JPS55133148A JP3983179A JP3983179A JPS55133148A JP S55133148 A JPS55133148 A JP S55133148A JP 3983179 A JP3983179 A JP 3983179A JP 3983179 A JP3983179 A JP 3983179A JP S55133148 A JPS55133148 A JP S55133148A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- interference wave
- transmission
- branch circuit
- mixer
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15564—Relay station antennae loop interference reduction
- H04B7/15585—Relay station antennae loop interference reduction by interference cancellation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
- Radio Relay Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3983179A JPS55133148A (en) | 1979-04-04 | 1979-04-04 | Interference wave removal system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3983179A JPS55133148A (en) | 1979-04-04 | 1979-04-04 | Interference wave removal system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55133148A true JPS55133148A (en) | 1980-10-16 |
Family
ID=12563906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3983179A Pending JPS55133148A (en) | 1979-04-04 | 1979-04-04 | Interference wave removal system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55133148A (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4383331A (en) * | 1981-07-02 | 1983-05-10 | Motorola, Inc. | Method and means of preventing oscillations in a same-frequency repeater |
US4406016A (en) * | 1981-11-27 | 1983-09-20 | The United States Of America As Represented By The Secretary Of The Army | VHF Sensor in-band radio relay |
JPS58204637A (ja) * | 1982-05-24 | 1983-11-29 | Nippon Telegr & Teleph Corp <Ntt> | 干渉波補償方式 |
JPS59103433A (ja) * | 1982-12-06 | 1984-06-14 | Nippon Telegr & Teleph Corp <Ntt> | 干渉波補償装置 |
WO1984002626A1 (en) * | 1982-12-21 | 1984-07-05 | Motorola Inc | Improved isolation method and apparatus for a same frequency repeater |
US5115514A (en) * | 1987-08-03 | 1992-05-19 | Orion Industries, Inc. | Measuring and controlling signal feedback between the transmit and receive antennas of a communications booster |
US5369782A (en) * | 1990-08-22 | 1994-11-29 | Mitsubishi Denki Kabushiki Kaisha | Radio relay system, including interference signal cancellation |
JPH07297783A (ja) * | 1994-04-22 | 1995-11-10 | Nec Corp | 無線通信システム |
US5963847A (en) * | 1995-10-26 | 1999-10-05 | Ntt Mobile Communications Network Inc. | Booster system |
-
1979
- 1979-04-04 JP JP3983179A patent/JPS55133148A/ja active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4383331A (en) * | 1981-07-02 | 1983-05-10 | Motorola, Inc. | Method and means of preventing oscillations in a same-frequency repeater |
US4406016A (en) * | 1981-11-27 | 1983-09-20 | The United States Of America As Represented By The Secretary Of The Army | VHF Sensor in-band radio relay |
JPS58204637A (ja) * | 1982-05-24 | 1983-11-29 | Nippon Telegr & Teleph Corp <Ntt> | 干渉波補償方式 |
JPS59103433A (ja) * | 1982-12-06 | 1984-06-14 | Nippon Telegr & Teleph Corp <Ntt> | 干渉波補償装置 |
WO1984002626A1 (en) * | 1982-12-21 | 1984-07-05 | Motorola Inc | Improved isolation method and apparatus for a same frequency repeater |
US4475243A (en) * | 1982-12-21 | 1984-10-02 | Motorola, Inc. | Isolation method and apparatus for a same frequency repeater |
US5115514A (en) * | 1987-08-03 | 1992-05-19 | Orion Industries, Inc. | Measuring and controlling signal feedback between the transmit and receive antennas of a communications booster |
US5369782A (en) * | 1990-08-22 | 1994-11-29 | Mitsubishi Denki Kabushiki Kaisha | Radio relay system, including interference signal cancellation |
JPH07297783A (ja) * | 1994-04-22 | 1995-11-10 | Nec Corp | 無線通信システム |
US5963847A (en) * | 1995-10-26 | 1999-10-05 | Ntt Mobile Communications Network Inc. | Booster system |
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