翻訳と辞書 Words near each other ・ Phase II Pan Groove ・ Phase III (album) ・ Phase inversion ・ Phase inversion (chemistry) ・ Phase IV ・ Phase IV (album) ・ Phase jitter modulation ・ Phase lag (rotorcraft) ・ Phase line ・ Phase line (cartography) ・ Phase line (mathematics) ・ Phase Linear ・ Phase margin ・ Phase modulation ・ Phase music ・ Phase noise ・ Phase of play ・ Phase offset modulation ・ Phase One (Art Ensemble of Chicago album) ・ Phase One (company) ・ Phase One Endurance ・ Phase One Media Pro ・ Phase One Studios ・ Phase Pardhi ・ Phase perturbation ・ Phase plane ・ Phase plug ・ Phase portrait ・ Phase problem ・ Phase qubit 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 Phase noise ： ウィキペディア英語版 Phase noise In signal processing, phase noise is the frequency domain representation of rapid, short-term, random fluctuations in the phase of a waveform, caused by time domain instabilities ("jitter"). Generally speaking, radio frequency engineers speak of the phase noise of an oscillator, whereas digital system engineers work with the jitter of a clock. ==Definitions== Historically there have been two conflicting yet widely used definitions for phase noise. Some authors define phase noise to be the spectral density of a signal's phase only, while the other definition refers to the phase spectrum (which pairs up with the amplitude spectrum, see spectral density#Related concepts) resulting from the spectral estimation of the signal itself. Both definitions yield the same result at offset frequencies well removed from the carrier. At close-in offsets however, the two definitions differ. The IEEE defines phase noise as where the "phase instability" is the one-sided spectral density of a signal's phase deviation.〔, see definition 2.7.〕 Although is a one-sided function, it represents "the double-sideband spectral density of phase fluctuation".〔, stating ℒ(''f'') "is one half the of the double-sideband spectral density of phase fluctuation."〕 The phase noise expression is pronounced "script ell of f". 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「Phase noise」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.