Sバンドレーダで観測したシークラッタの抑圧と小型船の検出

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): Suppression of Sea Clutter and Detection of Small Ship Observed by an S-band Radar

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，シークラッタ，小型船，ワイブルCFAR　　S-band radar，sea clutter，small ship，Weibull/CFAR

要約(英語): I have observed sea clutter including a target (small 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 investigate the sea clutter amplitude statistics, I introduce the Akaike Information Criterion (AIC). I have found that the sea clutter amplitudes obey the log-normal distribution with the shape parameter of σ = 0.385 for entire data and the log-normal, Weibull, and log-Weibull distributions with the shape parameters of σ = 0.379 to 0.505, c = 2.92 to 4.81, and c = 12.33 to 15.28, respectively, for data within the beam width of an antenna. The number of the smallest AIC (MAIC) of the log-normal, Weibull, and log-Weibull distributions to data are 3, 5, and 4, respectively, from 12 range sweep numbers. I have used the Weibull/CFAR (Constant False Alarm Rate) circuit which is modified a Cell-Averaging (CA) LOG/CFAR circuit. It is found that small ship is detected and sea clutter is suppressed with improvement of 24.83dB by Weibull/CFAR.

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: 217-223 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_217/_article/-char/ja/