高精度スペクトラム利用率測定によるホワイトスペース推定法の研究

Material type: 文書・図像類

Author: 梅比良,, 正弘ほか

Publisher: 茨城大学工学部

Publication date: 2016-06-14

Material Format: Digital

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Material Type: 文書・図像類
Title: 高精度スペクトラム利用率測定によるホワイトスペース推定法の研究
Author/Editor: 梅比良,, 正弘
Umehira,, Masahiro
Author Heading: 梅比良,, 正弘
Umehira,, Masahiro
Publication, Distribution, etc.: 茨城大学工学部
Publication Date: 2016-06-14
Publication Date (W3CDTF): 2016-06-14
Alternative Title: Reserach of white space estimation based on precise spectrum occupancy rate measurement
Text Language Code: jpn
Target Audience: 一般
Note (General): application/pdf
text/plain
研究報告書
研究成果の概要（和文）：コグニティブ無線による周波数利用効率改善効果を明らかにするために必要となる空間的、時間的なスペクトラム利用率を精度よく測定する手法が必要となる。本研究では，受信電力の累積確率分布に基づく雑音信号の時間占有率ならびに平均電力の同時最小二乗推定に基づくスペクトラム占有率測定法を提案した。提案法に基づき、スペクトルアナライザと信号処理用PCを用いたスペクトラム占有率測定装置を開発し、雑音不確定性がある場合でも、AWGN環境では受信信号SNRが2dB以上、フェージング環境では12dB以上であれば、測定誤差2%以下の高精度なスペクトル占有率測定が可能であることを明らかにした。研究成果の概要（英文）：It is necessary to develop precise spectrum occupancy rate (SOR) measurement techniques for estimating available white space. We have proposed an advanced CDF (Cumulative Probability distribution Function) based SOR measurement method by simultaneous estimation of spectrum occupancy rate and average power of Gaussian noise to improve SOR measurement performance in low SNR environments even if noise uncertainty exists. To confirm the validity of the proposed method, we have developed a proto-type SOR measurement system and have evaluated SOR measurement performance in AWGN and fading environments by computer simulations and experiments. The evaluated results show that the proposed method can measure SOR maintaining SOR error less than 2% in AWGN channel for SNR>2dB and in frequency selective fading channel for SNR>12dB even if noise uncertainty exists. Furthermore, it is demonstrated that the proposed method can measure SNR of wireless packet signals.
DOI: 10.34405/00018784
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 茨城大学 : 茨城大学学術情報リポジトリ