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:
Oct. 25, 2011
Filed:
Sep. 11, 2006
Pan-soo Kim, Daejon, KR;
Byoung-hak Kim, Daejon, KR;
Yun-jeong Song, Daejon, KR;
Deock-gil OH, Daejon, KR;
Ho-jin Lee, Daejon, KR;
Jun Heo, Seoul, KR;
Joong-gon Ryoo, Seoul, KR;
Pan-Soo Kim, Daejon, KR;
Byoung-Hak Kim, Daejon, KR;
Yun-Jeong Song, Daejon, KR;
Deock-Gil Oh, Daejon, KR;
Ho-Jin Lee, Daejon, KR;
Jun Heo, Seoul, KR;
Joong-Gon Ryoo, Seoul, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided are an apparatus for estimating a phase error and a phase error correcting system using the phase error estimating apparatus. The apparatus includes: a probability value estimating unit for estimating a negative log probability value for each transmission symbol by transforming a soft output information transferred from the outside to a log A posterior probability ratio (LAPPR) value; an APP value calculating unit for calculating a posterior probability (APP) value by applying a negative exponential function to the transmission symbol; an average value deciding unit for deciding an average value for each transmission symbol using the probability information entirely, partially, or selectively according to a probability information type; and a symbol phase estimating unit for estimating a phase of a symbol based on the decided average value.