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:
Apr. 13, 2010
Filed:
May. 25, 2006
Il-han Kim, Chungbuk, KR;
Joon-gyu Ryu, Daejon, KR;
Ho-kyom Kim, Daejon, KR;
Deock-gil OH, Daejon, KR;
Il-Han Kim, Chungbuk, KR;
Joon-Gyu Ryu, Daejon, KR;
Ho-Kyom Kim, Daejon, KR;
Deock-Gil Oh, Daejon, KR;
Abstract
Provided are an apparatus and method for robust Binary Phase Shift Keying/Quadrature Phase Shift Keying (BPSK/QPSK) blind modulation classification. The apparatus includes first and second likelihood value calculators for calculating a likelihood value of a received baseband signal each for of BPSK and QPSK modulation modes. A maximum setting unit derives a maximum value of the likelihood values or ilikelihood ratios calculated by the first and second likelihood value calculators. A flag is set for the maximum value to '1' and a flag for the remaining value is set to '0'. First and second flag combining units combine the flags for the modulation modes. A modulation mode flag setting unit selects a maximum value from the flags combined by the first and second flag combining units.