翻訳と辞書 Words near each other ・ Noise Poison Records ・ Noise pollution ・ Noise pop ・ Noise Pop Festival ・ Noise power ・ Noise print ・ Noise Production ・ Noise Ratchet ・ Noise Records ・ Noise reduction ・ Noise reduction (disambiguation) ・ Noise reduction coefficient ・ Noise regulation ・ Noise rock ・ Noise shaping ・ Noise spectral density ・ Noise temperature ・ Noise trader ・ Noise Unit ・ Noise Viola ・ Noise Viola (album) ・ Noise vs. Beauty ・ Noise weighting ・ Noise Won't Stop ・ Noise, vibration, and harshness ・ Noise-based logic ・ Noise-canceling microphone ・ Noise-cancelling headphones ・ Noise-Domain Reflectometry ・ Noise-equivalent flux density 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 Noise spectral density ： ウィキペディア英語版 Noise spectral density In communications, noise spectral density ''N''0 is the noise power per unit of bandwidth; that is, it is the power spectral density of the noise. It has dimension of power/frequency (see dimensional analysis), whose SI coherent unit is watts per hertz, which is equivalent to watt-seconds. If the noise is one-sided white noise, i.e., constant with frequency, then the total noise power ''N'' in a bandwidth ''B'' is ''BN''0. For double-sided white noise, this is doubled, so ''N'' is ''BN''0/2. This is utilized in signal-to-noise ratio calculations. The thermal noise density is given by ''N''0 = ''kT'', where k is Boltzmann's constant in joules per kelvin, and ''T'' is the receiver system noise temperature in kelvins. ''N0'' is commonly used in link budgets as the denominator of the important figure-of-merit ratios ''E''''b''/''N''0 and ''E''''s''/''N''0. ==References== * 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「Noise spectral density」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.