The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2013
Filed:
Sep. 17, 2010
Ho-min Eum, Daejeon, KR;
Heung-mook Kim, Daejeon, KR;
Hyoung-nam Kim, Busan, KR;
Yong-gu JO, Busan, KR;
Ho-Min Eum, Daejeon, KR;
Heung-Mook Kim, Daejeon, KR;
Hyoung-Nam Kim, Busan, KR;
Yong-Gu Jo, Busan, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Institute for Research & Industry Cooperation, PNU, Busan, KR;
Abstract
A feedback signal cancellation apparatus includes a first RF receiver configured to down-convert a received RF signal to a predetermined frequency band, a subtractor configured to subtract a replica of a feedback signal from the down-converted signal, a transmission signal generator configured to generate a repeater output signal using a feedback cancelled signal, a RF transmitter configured to transmit the repeater output signal, a second RF receiver configured to down-convert a RF signal outputted from the RF transmitter to a predetermined frequency band, a reference signal generator configured to receive the RF signal and generate a reference signal having no DC pilot, and a replica generator configured to generate a filter coefficient using correlation between the feedback cancelled signal and the reference signal and to generate a replica of the feedback signal using the generated filter coefficient and the down-converted signal of the second RF receiver.