| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fixed codebook search method and a fixed codebook search device. <P>SOLUTION: A basic codebook is obtained, which includes pieces of position information about N pulses on M tracks, where N and M are positive integers. As search pulses, n pulses are selected from among Ns pulses, the Ns pulses are the whole or a part of the N pulses, where Ns is an integer equal to or less than N and n is a positive integer less than Ns. To obtain a search codebook, positions of the n search pulses are replaced with other positions on the track, respectively. The above search process is repeated K times, where K is a positive integer equal to or greater than two, and in at least one search process, two or more search pulses are selected, the search pulses being all different. A codebook for loop optimization is selected between the basic codebook and the search codebook, on the basis of predetermined evaluation criteria. <P>COPYRIGHT: (C)2013,JPO&INPIT |
