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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李枝宏(Ju-Hong Lee) | |
dc.contributor.author | Yen-Lin Chen | en |
dc.contributor.author | 陳彥霖 | zh_TW |
dc.date.accessioned | 2021-06-14T17:24:31Z | - |
dc.date.available | 2011-08-05 | |
dc.date.copyright | 2008-08-05 | |
dc.date.issued | 2008 | |
dc.date.submitted | 2008-07-24 | |
dc.identifier.citation | [1] Lena Chang and C.C.Yeh, “Performance of DMI and eigenspace-based beamformers,” IEEE Transaction on Antennas and Propagation, Sep.1992.
[2] L.Chang and C.C.Yeh, “Resolution threshold for coherent sources using smoothed eigenstructure method,” IEE Proceedings Part F, Vol.138, No.5, pp.470-478, Oct.1991. [3] S.U.Pillai, Array Signal Processing. New York: Springer-Verlag, 1989 [4] David D.Feldman and Lloyd J.Griffiths, “A performance analysis of robust constrained beamforming with random errors,” IEEE ICASSP, vol.4, pp.540-543, April, 1993 [5] Ju-Hong Lee and Yen-Lin Chen, “Adaptive beamforming using uniform circular arrays under mutual coupling,” IASTED-SIP, conference proceeding, 2007. [6] S. Kikuchi, H. Tsuji, A. Sano, “Autocalibration algorithm for robust capon beamforming,” IEEE Trans. on Antennas and Wireless Propagation Letters, 5, 2006, 251-255 [7] C. A. Balanis, Antenna Theory Analysis and Design (New York, Wiley, 1997) [8] S.Durrani and M. E. Bialkowski, “Effect of mutual coupling on the interference rejection capabilities of linear and circular arrays in CDMA systems,” IEEE Trans. on Antennas and Propagation, Vol.52, No.4, April 2004 [9] D.D. Feldman and L.J. Griffiths, “A constraint projection approach for robust adaptive beamforming,” IEEE ICASSP, vol.2, pp.1381-1384, April, 1991 [10] M. Wax and T. Kailath, “Detection of signals by information theoretic criteria,” IEEE Trans. Acoustics, Speech, Signal Processing, Vol.ASSP-33, pp.387-392, April 1985 [11] M. Wax and Y. Anu, “Performance analysis of the minimum variance beamformer,” IEEE Trans. on Signal Processing, Vol.44, No.4, April 1996 [12] R. A. Monzingo and T. W. Miller, Introduction to Adaptive Arrays, John Wiley &Sons,1980 [13] I. S. Reed, J. D. Mallett and L. E. Brennan, “Rapid convergence rate in adaptive arrays,” IEEE Trans. on Aerospace and Electronic Systems, Vol. AES-10, No.6, Nov 1974 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/41217 | - |
dc.description.abstract | 天線陣列信號處理之演算法分成「方位估測」及「波束成型」兩大領域,多種經典演算法早在數十年前即被提出,然而這些演算法在實際應用時卻遭遇許多非理想效應,導致輸出效能無法達到理想的水準。近來學者專家不斷研究更加強健的演算法,試圖改進這些非理想效應造成的效能惡化,許多解決方案已被提出。
近年來,天線間的交互耦合效應已逐漸受到重視,本篇論文即是針對波束成型技術在交互耦合效應下作討論。首先我們的實驗發現在交互耦合的情況下,特徵空間波束成型器(Eigenspace-based Method, ESB)較線性限制最小輸出功率波束成型器(Linear Constrained Minimum Variance Beamformer, LCMV)具有較好之效能,接者我們嘗試對這兩種波束成型器作效能分析。在分析交互耦合效應之前,我們參考[1]中分析有限取樣點之方法,並用類似之方法分析交互耦合之效應。首先推導LCMV與ESB的所欲信號、干擾信號及雜訊輸出功率,取比例後即求得兩者的輸出信號對干擾加雜訊之功率比(signal-to-interference-plus-noise ratio, SINR)。 效能分析的結果發現當這兩種演算法的輸出SINR分子正規化到相同的數值時,LCMV的輸出SINR在分母的部分比ESB多了一個非負項,因此證實了在無限取樣點下ESB法確實較LCMV法更能抵抗交互耦合效應。理論分析的結果與實驗模擬的結果在取樣點數足夠多的情況下相當吻合,說明了推導過程的正確性。 此外,我們所提供的理論分析結果可適用於任何接收信號可表達成(2.39)式之非理想效應以及任何幾何形狀之天線陣列。 | zh_TW |
dc.description.abstract | Two major topics in the antenna array signal processing are bearing estimation and adaptive beamforming. Many classical algorithms have been proposed in the past decades. Because the algorithms suffer from degradation in practical applications, they cannot achieve satisfactory performance. Many scholars and experts keep looking for algorithms with robustness and the abilities to mitigate the effects in practical environments. A lot of efficient solutions have been proposed to combat the nonideal effects.
Recently, the mutual coupling effects between antenna array sensors have been considered seriously. The goal of the thesis is to consider the mutual coupling effects on the adaptive beamforming. First, we found that the performance of ESB (Eigenspace-based) beamformer is superior to LCMV (Linear Constrained Minimum Variance) beamformer under mutual coupling effects. Then, we tried to analyze the performance of the two beamformers. We first referred to the steps analyzing the finite sample effects provided in [1] and then used the similar steps to analyze the mutual coupling effects. We computed the output SINR(Signal-to-Interference-plus-Noise Ratio) of the two beamformers and found that the denominator of the output SINR of LCMV beamformer is larger than that of ESB beamformer with a nonnegative term while the numerators are the same. For this reason, we confirm the ESB beamformer is more robust than the LCMV beamformer under mutual coupling environment. The theoretical results match the simulation results when the numbers of snapshot are sufficient. It also shows the validity of the theoretical results. Besides, the results are suitable for any nonideal effect under the similar received signal model and arbitrary array geometry. | en |
dc.description.provenance | Made available in DSpace on 2021-06-14T17:24:31Z (GMT). No. of bitstreams: 1 ntu-97-J95921045-1.pdf: 6359503 bytes, checksum: 25fb126f44d2fbb225dcde054e0b7880 (MD5) Previous issue date: 2008 | en |
dc.description.tableofcontents | 致謝…………………………………………………………………………………….i
中文摘要………………………………………………………………………………ii 英文摘要……………………………………………………………………………...iii 目錄…………………………………………………………………………………....v 第一章 簡介……………………………………………………………...………….1 1-1 研究背景………………………………………………………...…………..1 1-2 研究動機…………………………………………………………………….2 1-3 論文架構…………………………………………………………………….2 第二章 天線陣列波束成型之基本觀念……………………….………..………….4 2-1 不同幾何結構之天線陣列數學模型……………………..………………...4 2-1-1 線形天線陣列.....................................................................…………4 2-1-2 圓形天線陣列……………………….…………………...………….6 2-2 自相關矩陣之介紹………………………………………………………….8 2-2-1 自相關矩陣之基本數學定義…………………….……...………….8 2-2-2 自相關矩陣之特徵分解…………………………..……..……… ..10 2-3 可適性波束成型演算法…………………………………………………...12 2-3-1 線性限制最小輸出功率波束成型器(Linearly Constrained Minimum Variance Beamformer)…………...................………….12 2-3-2 特徵空間波束成型器(Eigenspace-based Beamformer)………..14 2-4 交互耦合現象……………………………………………………………...15 2-4-1 交互耦合之信號模型……………………………………………...16 2-4-2 交互耦合對特徵值的影響………………………………………...19 2-4-3 交互耦合對特徵向量的影響……………………………………...22 2-4-4 交互耦合對雜訊子空間的影響…………………………………...23 2-5 信號對干擾加雜訊功率比(signal to interference plus noise ratio, SINR)之定義………………………………………………………………………..24 第三章 波束成型器在理想情況下的效能分析…………………………………..29 3-1 線性限制最小輸出功率波束成型器……………………………………..29 3-1-1 權重比例常數…………………………………………………...…29 3-1-2 所欲信號輸出功率……………………………………………...…30 3-1-3 干擾信號輸出功率……………………………………………...…32 3-1-4 雜訊輸出功率………………………………………………...……32 3-1-5 信號對干擾加雜訊之功率比…………………………………...…34 3-1-6 表格整理………………………………………………………...…35 3-2 特徵空間波束成型器……………………………………………………..35 3-3 理論分析結果……………………………………………………………..36 Appendix 3 、 、 的推導.............................................43 第四章 波束成型器在有限取樣點下的效能分析………………………………..47 4-1 線性限制最小輸出功率波束成型器………………………………….…..47 4-1-1 權重比例常數…………………………………………………...…47 4-1-2 所欲信號輸出功率……………………………………………...…51 4-1-3 干擾信號輸出功率……………………………………………...…51 4-1-4 雜訊輸出功率………………………………………………...……62 4-1-5 信號對干擾加雜訊之功率比…………………………………...…75 4-1-6 表格整理………………………………………………………...…76 4-2 特徵空間波束成型器……………………………………………………..76 4-2-1 權重比例常數…………………………………………………...…76 4-2-2 所欲信號輸出功率……………………………………………...…78 4-2-3 干擾信號輸出功率……………………………………………...…78 4-2-4 雜訊輸出功率………………………………………………...……85 4-2-5 信號對干擾加雜訊之功率比…………………………………...…93 4-2-6 表格整理………………………………………………………...…94 4-3 實驗模擬與理論分析結果………………………………………………..95 4-3-1 實驗模擬作法流程…….….…..………………………………...…96 4-3-2 理論結果作法流程…….….…..……………………………….....100 4-3-3 結果分析………………………………………………………….101 Appendix 4-1 與 間的關係…………………………………………….108 Appendix 4-2 的逐項推導…………………………………………….111 Appendix 4-3 的逐項推導……………………………………………129 第五章 波束成型器在交互耦合情況下的效能分析……………………………139 5-1 線性限制最小輸出功率波束成型器…………………………………….139 5-1-1 所欲信號輸出功率…………………………………………….....139 5-1-2 干擾信號輸出功率…………………………………………….....142 5-1-3 雜訊輸出功率………………………………………………...…..145 5-1-4 權重比例常數………………………………………………….....151 5-1-5 信號對干擾加雜訊之功率比………………………………….....155 5-1-6 表格整理……………………………………………………….....156 5-2 特徵空間波束成型器……………………………………………………157 5-2-1 所欲信號輸出功率…………………………………………….....157 5-2-2 干擾信號輸出功率…………………………………………….....160 5-2-3 雜訊輸出功率………………………………………………...…..163 5-2-4 權重比例常數…………………………………………………….167 5-2-5 信號對干擾加雜訊之功率比………………………………….....171 5-2-6 表格整理……………………………………………………….....173 5-3 實驗模擬與理論分析結果………………………………………………174 5-3-1 實驗模擬作法流程…….….…..……………………………….....176 5-3-2 理論結果作法流程…….….…..……………………………….....178 5-3-3 結果分析………………………………………………………….179 第六章 總結與未來研究方向………………………………………………..…..190 參考資料……………………………………………………………………………192 | |
dc.language.iso | zh-TW | |
dc.title | 在交互耦合情況下天線陣列波束成型之有效方法及其效能分析 | zh_TW |
dc.title | An efficient method and the performance analysis of antenna array beamforming under mutual coupling effects | en |
dc.type | Thesis | |
dc.date.schoolyear | 96-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 王晉良(Chin-Liang Wang),陳巽璋(Shiunn-Jang Chern) | |
dc.subject.keyword | 陣列信號處理,智慧型天線,波束成型,線性限制最小輸出功率波束成型器,特徵空間波束成型器,交互耦合, | zh_TW |
dc.subject.keyword | Array Signal Processing,Smart Antenna,Beamforming,LCMV Beamformer,ESB Beamformer,Mutual Coupling, | en |
dc.relation.page | 193 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2008-07-26 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電機工程學研究所 | zh_TW |
顯示於系所單位: | 電機工程學系 |
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