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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 Signal-to-interference ratio ： ウィキペディア英語版 Signal-to-interference ratio The signal-to-interference ratio (SIR or ''S/I'' ), also known as the carrier-to-interference ratio (CIR or ''C/I''), is the quotient between the average received modulated carrier power ''S'' or ''C'' and the average received co-channel interference power ''I'', i.e. cross-talk, from other transmitters than the useful signal. The CIR resembles the carrier-to-noise ratio (CNR or ''C/N''), which is the signal-to-noise ratio (SNR or ''S/N'') of a modulated signal before demodulation. A distinction is that interfering radio transmitters contributing to ''I'' may be controlled by radio resource management, while ''N'' involves noise power from other sources, typically additive white gaussian noise (AWGN). ==Carrier-to-noise-and-interference ratio (CNIR)== The CIR ratio is studied in interference limited systems, i.e. where ''I'' dominates over ''N'', typically in cellular radio systems and broadcasting systems where frequency channels are reused in view to achieve high level of area coverage. The ''C/N'' is studied in noise limited systems. If both situations can occur, the carrier-to-noise-and-interference ratio (CNIR or ''C/(N+I)'') may be studied. 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「Signal-to-interference ratio」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.