KR100360847B1 - Feedback interference canceller - Google Patents

Feedback interference canceller Download PDF

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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
Application number
KR1020010046967A
Other languages
Korean (ko)
Inventor
Sun Jin Kim
Original Assignee
Power Korea Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Power Korea Inc filed Critical Power Korea Inc
Priority to KR1020010046967A priority Critical patent/KR100360847B1/en
Application granted granted Critical
Publication of KR100360847B1 publication Critical patent/KR100360847B1/en

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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

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  • 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.
KR1020010046967A 2001-08-03 2001-08-03 Feedback interference canceller KR100360847B1 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (8)

* Cited by examiner, † Cited by third party
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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