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:
Jun. 29, 2010
Filed:
May. 02, 2007
Method and device for optimizing codebook for quantized precoder by using steepest descent algorithm
Dong-seung Kwon, Daejeon, KR;
Young-seog Song, Daejeon, KR;
In-kyeong Choi, Daejeon, KR;
Chung-yong Lee, Seoul, KR;
Myeong-cheol Shin, Goyang, KR;
Myoung-seog Kim, Seoul, KR;
Seung-joon Lee, Daejeon, KR;
Dong-Seung Kwon, Daejeon, KR;
Young-Seog Song, Daejeon, KR;
In-Kyeong Choi, Daejeon, KR;
Chung-Yong Lee, Seoul, KR;
Myeong-Cheol Shin, Goyang, KR;
Myoung-Seog Kim, Seoul, KR;
Seung-Joon Lee, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
In a method for optimizing a codebook including a quantized channel between a base station transmitter and a portable terminal: a) select the codebook to be optimized; b) a steepest descent algorithm is applied to respective codewords of the codebook selected in a), wherein the codewords are transformed so that a correlation between the codewords is minimized, and a function indicating the correlation between the codewords is differentiated and is multiplied by a predetermined step size and is used for a parameter for generating a new codeword in the steepest descent algorithm; c) it is determined whether the codebook including the codewords transformed in b) is optimized; and d) the codebook is stored when it is determined in c) that the codebook is optimized.