博碩士論文 101523032 詳細資訊




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姓名 鄭伯偉(Bo-wei Zheng)  查詢紙本館藏   畢業系所 通訊工程學系
論文名稱 具方向估計的麥克風陣列之窄頻帶訊號干擾消除
(Narrowband Signal Interference Cancellation with DOA Estimation in Microphone array)
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摘要(中) 接收訊號時,除了接收到自己所要的訊號外,也會接收到來自其它不同訊號源所發出的訊號而導致干擾問題。利用波束成型技術波束可改進為廣義旁辦消除器,而後來,也可進步到加入了回授的功能,進而讓系統的效能和效率大大的提升。然而,並不是所有的系統都能使用訊號回授功能。本篇論文基於在得到訊號中的部份訊息的情況下,搭配上擴展型卡爾曼濾波器的使用,來模擬出回授系統的效能。此外,束波成型技術需要準確的訊號源入射角度。因此,本文也提出了當訊號源處於動態的情況下,利用GSC 系統的輸出訊號去估計角度變動量的訊息,來更新系統角度。
摘要(英) The received signal usually contains unwanted interference signals that are simultaneously generated from other sources. In order to solve the interference problem, the beamforming technique has been well developed, and then the generalized sidelobe canceler (GSC) is commonly applied for eliminating interference signals. Moreover, the system performance can be greatly improved with the feedback structure. However, not all of the applications can well adopt the feedback method. In this paper, the augment Kalman filter (AKF) is developed along with the feedback method for GSC. In addition, the beamforming technique requires the information of the direction-of-angle (DOA) of the desired
signal. Here, we also proposed a new method to estimate the DOA for a moving signal source in order to update the required DOA signal in the GSC system.
關鍵字(中) ★ 卡爾曼濾波器
★ 廣義旁帶消除器
關鍵字(英) ★ Kalman filter
★ Generalized Sidelobe Canceller
論文目次 中文摘要 i
英文摘要 ii
目錄 i
圖目錄 ii
表目錄 iii
第1 章序論 1
1.1 前言 1
1.2 章節架構 4
第2 章訊號模型GSC 波束形成器架構 5
2.1 訊號模型 5
2.2 廣義旁帶消除器 8
第3 章GSC 角度誤差分析與修正及擴展型卡爾曼濾波器之應用 13
3.1 欲求訊號入射角度 預測誤差的影響 13
3.2 欲求訊號入射角度k 估計方式 18
3.3 使用擴維卡爾曼濾波器(Augmented Kalman Filter,AKF) 來增
加系統效能 23
第4 章系統模擬與結果分析 29
4.1 系統模擬參數 29
第5 章結論 45
參考文獻 46
附錄A:角度估計過呈推導 49
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[18] G. Fudge and D. Linebarger, “A calibrated generalized sidelobe canceller for wideband beamforming,” IEEE Transactions on Signal Processing, vol. 42, no. 10, pp. 2871–2875, Oct 1994.
[19] ——, “Optimal array calibration to minimize signal cancellation in adaptive wideband beamformers,” in Conference Record of The Twenty-Seventh Asilomar Conference on Signals, Systems and Computers, 1993, Nov 1993, pp. 1078–1082 vol.2.
[20] S. Gannot, D. Burshtein, and E. Weinstein, “Signal enhancement using beamforming and nonstationarity with applications to speech,” IEEE Transactions on Signal Processing, vol. 49, no. 8, pp. 1614–1626, Aug 2001.
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指導教授 張大中(Dah-Chung Chang) 審核日期 2016-1-28
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