翻訳と辞書 Words near each other ・ Fadil Berisha ・ Fadil Ferati ・ Fadil Hadžić ・ Fadil Hoxha ・ Fadil Muriqi ・ Fadil Nimani ・ Fadil Paçrami ・ Fadil Sido ・ Fadil Vokrri ・ Fadilah Noor Abbe ・ Fadilla ・ Fadillah Yusof ・ Fadiman ・ Fadime Suna ・ Fadin ・ Fading ・ Fading (song) ・ Fading affect bias ・ Fading American Dream ・ Fading Away ・ Fading Days ・ Fading distribution ・ Fading Fast ・ Fading Frontier ・ Fading Gigolo ・ Fading Lights ・ Fading Like a Flower (Every Time You Leave) ・ Fading of the Cries ・ Fading Out ・ Fading Parade 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 Fading ： ウィキペディア英語版 Fading In wireless communications, fading is deviation of the attenuation affecting a signal over certain propagation media. The fading may vary with time, geographical position or radio frequency, and is often modeled as a random process. A fading channel is a communication channel that experiences fading. In wireless systems, fading may either be due to multipath propagation, referred to as multipath induced fading, or due to shadowing from obstacles affecting the wave propagation, sometimes referred to as shadow fading. ==Key concepts== The presence of reflectors in the environment surrounding a transmitter and receiver create multiple paths that a transmitted signal can traverse. As a result, the receiver sees the superposition of multiple copies of the transmitted signal, each traversing a different path. Each signal copy will experience differences in attenuation, delay and phase shift while travelling from the source to the receiver. This can result in either constructive or destructive interference, amplifying or attenuating the signal power seen at the receiver. Strong destructive interference is frequently referred to as a deep fade and may result in temporary failure of communication due to a severe drop in the channel signal-to-noise ratio. A common example of deep fade is the experience of stopping at a traffic light and hearing an FM broadcast degenerate into static, while the signal is re-acquired if the vehicle moves only a fraction of a meter. The loss of the broadcast is caused by the vehicle stopping at a point where the signal experienced severe destructive interference. Cellular phones can also exhibit similar momentary fades. Fading channel models are often used to model the effects of electromagnetic transmission of information over the air in cellular networks and broadcast communication. Fading channel models are also used in underwater acoustic communications to model the distortion caused by the water. 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「Fading」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.