KR100360847B1 - Feedback interference canceller - Google Patents
Feedback interference canceller Download PDFInfo
- Publication number
- KR100360847B1 KR100360847B1 KR1020010046967A KR20010046967A KR100360847B1 KR 100360847 B1 KR100360847 B1 KR 100360847B1 KR 1020010046967 A KR1020010046967 A KR 1020010046967A KR 20010046967 A KR20010046967 A KR 20010046967A KR 100360847 B1 KR100360847 B1 KR 100360847B1
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- feedback interference
- phase
- external control
- transmission output
- Prior art date
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)
- Transmitters (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: A feedback interference canceller is provided to prevent oscillation phenomenon generated when an RF(Radio Frequency) signal transmitted from a transmitting antenna is fed back to a receiving antenna. CONSTITUTION: A power divider(111) extracts a partial signal of a transmission output signal transmitted to a transmitting antenna(130) according to an external control, and divides the extracted partial signal at a uniform rate. An amplification attenuator(112) receives the signal divided in the power divider(111), and amplifies or attenuates the received signal at a level same to the amplitude of a feedback interference according to the external control. The first time delay(113) adjusts a time delay value according to the external control to have a delay time same to a delay time of the feedback interference. A phase converter(114) compares a phase coefficient of a corresponding signal generated through the power divider(111), the amplification attenuator(112), and the first time delay(113) with a phase coefficient of the feedback interference, and adjusts a phase value so that the phase difference of 180 degrees is generated in the phase coefficient of the corresponding signal. A phase inversion coupler(115) inverts the phases of the corresponding signal and the feedback interference at 180 degrees, and cancels the feedback interference. The second time delay(117) delays a main transmission output signal which remains after the partial signal of the transmission output signal is divided in the power divider(111) during a uniform time according to the external control, and transmits the main transmission output signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020010046967A KR100360847B1 (en) | 2001-08-03 | 2001-08-03 | Feedback interference canceller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020010046967A KR100360847B1 (en) | 2001-08-03 | 2001-08-03 | Feedback interference canceller |
Publications (1)
Publication Number | Publication Date |
---|---|
KR100360847B1 true KR100360847B1 (en) | 2002-11-13 |
Family
ID=37490540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020010046967A KR100360847B1 (en) | 2001-08-03 | 2001-08-03 | Feedback interference canceller |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100360847B1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050009467A (en) * | 2003-07-16 | 2005-01-25 | (주)지에스텔레텍 | Repeater for having function of feedback signal cancellation and mathod for removing feedback signal |
KR100500876B1 (en) * | 2002-10-29 | 2005-07-14 | 한국전자통신연구원 | Interference signal cancellation system and relay system therefor |
KR100544227B1 (en) * | 2002-10-22 | 2006-01-23 | 한국전자통신연구원 | Interference signal cancellation system and relay system therefor |
KR100599541B1 (en) | 2004-07-12 | 2006-07-13 | 전자부품연구원 | Uwb tranceiver system |
KR100604677B1 (en) * | 2003-05-28 | 2006-07-26 | (주)에어포인트 | CDMA repeater for having function of feedback cancellation and power auto-control |
KR100856283B1 (en) * | 2007-04-03 | 2008-09-03 | 삼성전기주식회사 | Apparatus and mothed for removing interfering noise in personal communication terminal |
KR101060585B1 (en) * | 2003-07-19 | 2011-08-31 | 주식회사 쏠리테크 | Wireless repeater with echo canceller and echo signal cancellation method |
CN106357297A (en) * | 2016-10-27 | 2017-01-25 | 电子科技大学 | Simultaneous same-frequency full-duplex radio-frequency self-interference suppression method under existence of broadband signal |
-
2001
- 2001-08-03 KR KR1020010046967A patent/KR100360847B1/en not_active IP Right Cessation
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100544227B1 (en) * | 2002-10-22 | 2006-01-23 | 한국전자통신연구원 | Interference signal cancellation system and relay system therefor |
KR100500876B1 (en) * | 2002-10-29 | 2005-07-14 | 한국전자통신연구원 | Interference signal cancellation system and relay system therefor |
KR100604677B1 (en) * | 2003-05-28 | 2006-07-26 | (주)에어포인트 | CDMA repeater for having function of feedback cancellation and power auto-control |
KR20050009467A (en) * | 2003-07-16 | 2005-01-25 | (주)지에스텔레텍 | Repeater for having function of feedback signal cancellation and mathod for removing feedback signal |
KR101060585B1 (en) * | 2003-07-19 | 2011-08-31 | 주식회사 쏠리테크 | Wireless repeater with echo canceller and echo signal cancellation method |
KR100599541B1 (en) | 2004-07-12 | 2006-07-13 | 전자부품연구원 | Uwb tranceiver system |
KR100856283B1 (en) * | 2007-04-03 | 2008-09-03 | 삼성전기주식회사 | Apparatus and mothed for removing interfering noise in personal communication terminal |
CN106357297A (en) * | 2016-10-27 | 2017-01-25 | 电子科技大学 | Simultaneous same-frequency full-duplex radio-frequency self-interference suppression method under existence of broadband signal |
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E701 | Decision to grant or registration of patent right | ||
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LAPS | Lapse due to unpaid annual fee |