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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/28246

Title: Underwater near-field Signal tracking based on adaptive far-field transformation
Authors: Lena Chang;J. Y. Huang
Contributors: NTOU:Department of Communications Navigation and Control Engineering
Date: 2008-04-25
Issue Date: 2011-10-21T02:36:27Z
Publisher: 第十屆水下技術研討會暨國科會成果發表會
Abstract: Abstract:In the study, we present a novel near-field direction estimation by using an adaptive far-field transformation (AFFT) approach. The proposed method can track the direction-of-arrivals (DOAs) and ranges of near-field sources, simultaneously. In addition, the proposed algorithm can be implemented by parallel processing approaches and estimate near-field DOAs in real time. Simulation results and water-tank experiments confirm the feasibility and efficiency of the proposed DOA estimation method in underwater environments.
摘要:本研究乃針對水下近場訊號源模式,提出一以適應性遠場轉換法為基礎之方位估測器,以即時估測和追蹤水下訊號源方位。此法藉由一適應性特徵分解演算法並結合遠場校正法和空間平滑法,可即時估測近場、同調訊號之方位。此法具計算量少、可平行處理、不需進行頻譜搜尋和不需預估方位等優點,因此可減緩近場、同調等非理想訊號源模式所造成方位估測偏差。此外,我們將此演算法則以TMS320C6701 的數位訊號處理器來實現,以驗證此法即時方位估測的效能;並利用水槽實驗所接收之實際訊號,來驗證此演算法於水中環境之可行性與正確性。
URI: http://ntour.ntou.edu.tw/handle/987654321/28246
Appears in Collections:[通訊與導航工程學系] 演講及研討會

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