翻訳と辞書 Words near each other ・ Raised Fist ・ Raised fist ・ Raised floor ・ Raised in Captivity ・ Raised on Country Music ・ Raised on It ・ Raised on Radio ・ Raised on Radio Tour ・ Raised on Rock (song) ・ Raised on Rock/For Ol' Times Sake ・ Raised on Whipped Cream ・ Raised pavement marker ・ Raised shoreline ・ Raised vowel ・ Raised-bed gardening ・ Raised-cosine filter ・ Raised-relief map ・ Raisedon Zenenga ・ Raisel Iglesias ・ Raisen ・ Raisen district ・ Raises Academy ・ Raishaun Henderson ・ Raisi ・ Raisin ・ Raisin (disambiguation) ・ Raisin (musical) ・ Raisin black ・ Raisin Bombers ・ Raisin Bowl Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Raised-cosine filter ： ウィキペディア英語版 Raised-cosine filter The raised-cosine filter is a filter frequently used for pulse-shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non-zero portion of the frequency spectrum of its simplest form ($\backslash beta\; =\; 1$) is a cosine function, 'raised' up to sit above the $f$ (horizontal) axis. ==Mathematical description== The raised-cosine filter is an implementation of a low-pass Nyquist filter, i.e., one that has the property of vestigial symmetry. This means that its spectrum exhibits odd symmetry about $\backslash frac$, where $T$ is the symbol-period of the communications system. Its frequency-domain description is a piecewise function, given by: :$H(f)\; =\; \backslash begin$ T, & |f| \leq \frac \\ \frac\left, & \frac < |f| \leq \frac \\ 0, & \mbox \end or in terms of havercosines: :$H(f)\; =\; \backslash begin$ T, & |f| \leq \frac \\ T\operatorname\left(\frac\left(- \frac\right )\right), & \frac < |f| \leq \frac \\ 0, & \mbox \end for :$0\; \backslash leq\; \backslash beta\; \backslash leq\; 1$ 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「Raised-cosine filter」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.