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題 名 | 適應性方位估測應用於水中通訊之設計=The Application of Direction-of-Arrival to Underwater Communication |
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作 者 | 張順雄; 張麗娜; 溫家炎; 呂鋑宏; | 書刊名 | 海下技術季刊 |
卷 期 | 9:1 1999.03[民88.03] |
頁 次 | 頁8-14 |
分類號 | 448.6 |
關鍵詞 | 方位估測; 水中通訊; |
語 文 | 中文(Chinese) |
中文摘要 | 高解析度方位估測的研究一直是雷達、聲納和地震學的主要探討方向。 高解析度方位估測的方法,利用訊號子空間的技衍,如MUSIC演算法,但其需要龐大的計算 量,為了減低計算量及做到即時追蹤的功能,可應用快速強解析度之可適性雜訊子空間運算 法來達成,如可適性膨脹演算法,其收斂性及具有高度並行運算架構,其追蹤效果很好。 本文主要將方位估測演算法以硬體方式實現,以瑋凌(Wave1ink)公司所製作之C4D模組,內 含德州儀器(Tl)公司生產的TMS320C44數位訊號處理晶片,將可適性膨脹演算法載入C4D模組 中,並發射窄頻弦波訊號及BPSK訊號,藉由水槽實驗來驗證理論及硬體架構之正確性及可行 性,實驗結果可知水下麥克風接收弦波效果相常地好,故能正確估測訊號源方位,達到追蹤 訊號源之目的。 |
英文摘要 | The research of resolution DOA (Direction-of-Arrival) estimation has become a very crucial trend. The high-resolution methods involved in DOA estimation utilizing signal subspace, for instance MUSIC algorithms are mainly based on eigenstructure. Nevertheless, abundant of computational load will berequired when we are doing the eigensdecomposition analysis. As an improvement to the tranditional one, an adaptive DOA estimation can achieve realtime tracking efficiency. It can be applied to a fast and robust resolution adaptive noise- subspace algorithms to accomplish. Because it has a good tracking efficiency. In this work, we will concentrate on the implementation of the algorithm of DOA estimation in the stretch of hardware structure. We turn the adaptive inflation algorithm into the C4D module including the TMS32044 Digital Signal Processor developed by Texas Instrument, and transmit narrow-band cosine signal and BPSK signal by the watertank experiments. The purposes of the study are to verify the accuracy and applicability of both the theoretical foundation and hardware structural build-up. The performance of receiving cosine signal has a good efficiency by using hydrophones as a result of watertank experiments. Finally, we can accurately estimate DOA to accomplish the purpose of tracking. |
本系統中英文摘要資訊取自各篇刊載內容。