Pulse or digital communications – Pulse code modulation
Reexamination Certificate
2007-05-02
2010-06-29
Vo, Don N (Department: 2611)
Pulse or digital communications
Pulse code modulation
C375S267000
Reexamination Certificate
active
07746936
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.
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Choi In-Kyeong
Kim Myoung-Seog
Kwon Dong-Seung
Lee Chung-Yong
Lee Seung-Joon
Electronics and Telecommunications Research Institute
Vo Don N
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