ワイブル分布の部分的Q-Q確率プロットにより分析したシークラッタとウェザークラッタの統計的性質

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2018/05/01

タイトル(英語): Amplitude Statistics of Sea and Weather Clutter Analyzed by Partial Q-Q Plot of Weibull Distribution

著者名: 佐山　周次（防衛大学校通信工学科）

著者名(英語): Shuji Sayama (Department of Communications Engineering, National Defense Academy)

キーワード: Sバンドレーダ，クラッタ，ワイブル分布，部分的Q-Q確率プロット　　S-band radar，clutter，Weibull distribution，partial Q-Q plot

要約(英語): In stormy weather due to typhoon hitting the Kanto district, I have observed sea and weather clutter including a target (ship) using an S-band radar with a frequency of 3.05GHz, a beamwidth of 1.8°, a pulsewidth of 0.5μs, and a pulse-repetition frequency of 1,600Hz. To analyze the sea and weather clutter amplitude statistics, I have proposed new partial Q-Q plot, which is more rigorous fit of the distribution to the data than conventional Q-Q plot. The partial Q-Q plot is as follows : locate the maximum value on the histogram of observed data and find the point on Q-Q plot corresponding to the maximum value. Fit the approximate line to this point and the nearest ones on both sides by least squares method. Adding a point nearest these ones, fit it similarly. Repeat them and select the approximate line giving the smallest RMSE (Root Mean Square Error). I have found that the sea and weather clutter amplitudes obey the Weibull distribution with the shape parameters of c = 2.88 for entire data and c = 2.68 to 4.08 for data within the beam width of an antenna.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.138 No.5 （2018） 特集：イノベーションを創出する最新の計測技術2017

本誌掲載ページ: 237-243 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/138/5/138_237/_article/-char/ja/