Method and device for optimizing codebook for quantized precoder by using steepest descent algorithm
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.
Electronics and Telecommunications Research Institute
H H H
H04B H04B H04B
inventional inventional inventional
Myeong-Cheol Myoung-Seog Young-Seog Dong-Seung Seung-Joon In-Kyeong Chung-Yong
Shin Kim Song Kwon Lee Choi Lee