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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Kasami code ： ウィキペディア英語版 Kasami code Kasami sequences are binary sequences of length 2N-1 where N is an even integer. Kasami sequences have good cross-correlation values approaching the Welch lower bound. There are two classes of Kasami sequences - the small set and the large set. ==The small set== The process of generating a Kasami sequence is initiated by generating a maximum length sequence ''a(n)'', where n=1..2N-1. Maximum length sequences are periodic sequences with a period of exactly 2N-1. Next, a secondary sequence is derived from the initial sequence via cyclic decimation sampling as ''b(n)'' = ''a(q *n)'', where q = 2N/2+1. Modified sequences are then formed by adding ''a(n)'' and cyclically time shifted versions of ''b(n)'' using modulo-two arithmetic, which is also termed the exclusive or (xor) operation. Computing modified sequences from all 2N/2 unique time shifts of ''b(n)'' forms the Kasami set of code sequences. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kasami code」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.