教師資料查詢 | 類別: 期刊論文 | 教師: 劉金源LIU, JIN-YUAN (瀏覽個人網頁)

標題:Clutter reduction using Doppler sonar in a harbor environments
學年101
學期1
出版(發表)日期2012/11/08
作品名稱Clutter reduction using Doppler sonar in a harbor environments
作品名稱(其他語言)
著者T.C. Yang; J. Schindall; C.-F. Huang; Jin-Yuan Liu
單位
出版者
著錄名稱、卷期、頁數Journal of Acoustical Society of America,132(5),p.3053-3067
摘要A high frequency experiment was conducted in the Woods Hole Harbor in Massachusetts to evaluate the effectiveness of Doppler sonar for discriminating targets from reverberation. Using a pulsed linear frequency modulated signal, one finds that the matched filtered outputs are filled with high-level discrete backscattered returns, referred to as clutter, which are often confused with the target echo. The high level non-target returns have an amplitude distribution that is heavy-tailed. Using a Doppler-sensitive binary-phase-shift-keying signal coded with an m-sequence, the target echo and clutter can be separated by Doppler and delay, and tracked using the Doppler spectrogram (Dopplergram). The Doppler filtered time series show a background reverberation with a Rayleigh-like amplitude distribution, with an improved signal-to-(peak) reverberation ratio compared with that without Doppler filtering. The reduced reverberation level with Doppler processing decreases the probability of false alarm (Pfa) for a given threshold level. Conversely, for a given Pfa, the higher signal-to-(peak) reverberation ratio implies a higher probability of detection. Transmission loss measurement was conducted to estimate some of the system parameters, e.g., the source level and target strength relative to the noise level.
關鍵字
語言中文
ISSN
期刊性質國內
收錄於
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版
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