| 摘要 |
Fixed codebook search method and fixed codebook searcher are provided. Basic codebook is acquired, said basic codebook comprising position information of N pulses on M tracks, where N, M are positive integers. n pulses are chosen from said Ns pulses as search pulses, said Ns pulses being a whole or a part of N pulses, where Ns is positive integer not more than N, n is positive integer less than Ns. Positions of said n search pulses are respectively replaced by other positions on the tracks to acquire search codebook. Said search process is implemented K times, where K is positive integer not less than two, two or more search pulses are chosen in at least one search process, all said search pulses are not the same. The loop optimal codebook is chosen from said basic codebook and search codebook in the preset estimate criterion. ® KIPO & WIPO 2009
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