講演抄録/キーワード |
講演名 |
2015-03-06 10:15
最小二乗法による雑音電力推定を用いた受信信号電力のCDFに基づくスペクトル占有率測定法の検討 ○良知昌太・齋藤 晟・梅比良正弘・武田茂樹(茨城大) SR2014-140 |
抄録 |
(和) |
周波数資源の時間的・空間的な利用状況を定量的に評価するため、受信信号電力のCDF(Cumulative Probability Distribution Function)を用いたスペクトル占有率測定法を提案しているが、受信信号のSNRが低くなると測定性能が急激に劣化する問題がある。本報告では低SNR時における測定性能向上のため、最小二乗法による雑音電力推定を用いた受信信号電力のCDFに基づく占有率測定法を提案し、計算機シミュレーションと実験により、被測定信号のSNR、パケット長、測定サンプル数などのパラメータ、ならびに雑音電力推定区間などの測定法におけるパラメータが占有率の測定誤差に及ぼす影響を評価し、従来の閾値を用いる手法に比べ測定性能が改善されることを示す。 |
(英) |
The authors have proposed a spectrum occupancy rate measurement technique using CDF (Cumulative Probability Distribution Function) of received signal power as a threshold in order to quantitatively evaluate the temporal and spatial usage of frequency resources. However, the conventional technique has a drawback, i.e. measurement performance is significantly degraded in low received SNR conditions. To improve the measurement performance of the conventional technique in low SNR conditions, this report proposes a novel spectrum occupancy rate measurement technique based on received signal power CDF using least squares method for noise power estimation. Computer simulations and experiments have been conducted to evaluate the measurement performance of the proposed new technique according to various, parameters such as received signal SNR, packet length, and measured number of samples, as well as parameters related to the measurement technique such as noise power estimation section. Simulation and experimental results show that the proposed new technique improves measurement accuracy in low SNR conditions. |
キーワード |
(和) |
コグニティブ無線 / 累積確率分布 / 最小二乗法 / 受信電力 / スペクトル占有率 / / / |
(英) |
Cognitive radio / Cumulative probability distribution function / Least square method / Received signal power / Spectrum occupancy / / / |
文献情報 |
信学技報, vol. 114, no. 491, SR2014-140, pp. 175-179, 2015年3月. |
資料番号 |
SR2014-140 |
発行日 |
2015-02-25 (SR) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SR2014-140 |