Xバンドレーダで観測したシークラッタに埋もれたターゲットの検出

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: 2021/09/01

タイトル(英語): Detection of Target Embedded in Sea Clutter Observed by an X-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: Xバンドレーダ，シークラッタ，埋もれたターゲット，メルセンヌ・ツイスタ法，一定誤警報率　　X-band radar，sea clutter，embedded target，Mersenne Twister method，CFAR

要約(英語): I have observed sea clutter containing an embedded target (ship) using an X-band radar with a frequency of 9.41GHz, a beamwidth of 1.0°, a pulsewidth of 0.5μs, and a pulse-repetition frequency of 1,600Hz. To investigate the sea clutter amplitude statistics, I have used the Akaike Information Criterion (AIC). It has been found that the sea clutter amplitudes obey the Weibull distribution with the shape parameter of c=3.20 for entire data and the log-normal, Weibull, log-Weibull, and Nakagami-m distributions with the shape parameters of σ=0.508, c=3.60 to 5.42, c=8.72 to 12.07, and m=1.72 to 2.05, respectively, for data within the beam width of an antenna. The number of best fit of the log-normal, Weibull, log-Weibull, and Nakagami-m distributions to data is 1, 16, 2, and 2, respectively, from 21 small data. I have applied Weibull/CFAR (Constant False Alarm Rate) circuit configured by modifying Cell-Averaging (CA) LOG/CFAR circuit to the observed data. To generate random numbers in this CFAR circuit, I have introduced the Mersenne Twister method which is superior to the conventional multiplication congruence method. I have succeeded in detecting ship embedded in sea clutter and suppressed it with improvement of 45.12dB by Weibull/CFAR processing.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.9 （2021） 特集：イノベーションを創出する最新の計測技術2021

本誌掲載ページ: 479-487 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/141/9/141_479/_article/-char/ja/