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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蘇炫榮 | zh_TW |
| dc.contributor.advisor | Hsuan-Jung Su | en |
| dc.contributor.author | 侯崇毅 | zh_TW |
| dc.contributor.author | Chung-Yi Hou | en |
| dc.date.accessioned | 2023-10-03T16:27:53Z | - |
| dc.date.available | 2023-11-09 | - |
| dc.date.copyright | 2023-10-03 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-08-10 | - |
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Keçeci, "Robust and Fast Automatic Modulation Classification with CNN under Multipath Fading Channels," 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, 2020, pp. 1-6, doi: 10.1109/VTC2020-Spring48590.2020.9128408. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90521 | - |
| dc.description.abstract | 時分複用多進多出雷達系統已經是一項實現高角度解析度前景廣闊的技術。我們將時分複用多進多出雷達與非均勻天線陣列結合，以提升角度解析度並且增加可以估測目標物的數量。在目標物有移動速度的場景下，速度引起的相位失真會導致角度-多普勒耦合，這就需要事先進行相位補償，以確保二維來向角的估測是正確的。
在本論文中，首先會應用離散傅立葉轉換來估計多普勒頻率，然後我們提出了低複雜度聯合塊正交匹配追蹤算法來執行二維欠定來向角估測，以充分利用空間自由度。我們所提出的低複雜度聯合塊正交匹配追蹤算法的效能表現與前人的算法差不多，但是複雜度卻降低了空間自由度取更號的數量級。 此外，我們還提出了一個迭代估計的方法，這個方法可以使得二為來向角和多普勒頻率估測更加準確。在迭代估計的方法中，我們利用多進多出雷達中虛擬天線的效應來使得多普勒頻率估計的解析度大幅上升。模擬結果將顯示我們所提出的算法和方法能夠提供傑出的效能表現。 | zh_TW |
| dc.description.abstract | Time-division multiplexing (TDM) multiple-input multiple-output (MIMO) radar system has been a promising technology for achieving high-angle resolution. We combine the TDM MIMO radar with the non-uniform arrays to enhance the angular resolution and increase the number of detectable sources. In the context of moving source scenario, the motion-induced phase distortion leads to angle-Doppler coupling, which requires the phase compensation in advance for estimating the two-dimensional (2D) direction of arrival (DoA) accurately. In this thesis, the discrete Fourier transform (DFT) is first applied to estimate the Doppler frequency and then the low-complexity joint block orthogonal matching pursuit (Joint-BOMP) algorithm is proposed to perform the underdetermined 2D-DoA estimation to fully exploit the degree of freedom (DoF). The proposed low-complexity Joint-BOMP can reach the performance as well as that of the previous works while the computational complexity can be reduced by the square root of DoF. Furthermore, we propose an iterative estimation scheme to make the 2D-DoA and Doppler frequency estimations more accurate. For the iterative estimation scheme, we make the estimation of Doppler frequency enjoy the effect of virtual array in the MIMO radar to increase the resolution. Simulation results will demonstrate that the proposed algorithm and scheme can provide superior performance. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-10-03T16:27:53Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-10-03T16:27:53Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 1 Introduction 1
1.1 Background 1 1.2 Contributions 6 1.3 Overview of the Thesis 8 1.4 Notations 9 2 System Model 10 2.1 MIMO Radar Configuration 10 2.2 Two-dimensional Non-uniform Array 13 2.3 TDM MIMO Radar with Nested Planar Arrays 16 2.4 The Design of Antenna Allocation with Fixed Total Antennas 19 2.5 Signal Model 20 2.5.1 Signal Model before Doppler Compensation 21 2.5.2 Signal Model after Doppler Compensation 23 3 Algorithms for Doppler and 2D-DoA Estimation 26 3.1 Doppler Frequency Estimation 26 3.1.1 Motion-Induced Phase Distortion 27 3.1.2 The Solution for Doppler Frequency Ambiguity 28 3.2 2D-DoA Estimation 30 3.2.1 Kronecker Compressive Sensing 32 3.2.2 Kronecker OMP 33 3.2.3 2D Compressive Sensing 35 3.2.4 Proposed Low-complexity Joint-BOMP 36 3.3 Iterative 2D-DoA and Doppler Frequency Estimation Scheme 40 4 Complexity Analysis 44 4.1 Doppler Frequency Estimation 44 4.2 2D-DoA Estimation 45 5 Simulation Results 48 5.1 Performance Evaluation versus SNR and Snapshots without Doppler Frequency 49 5.1.1 Detection Performance between 2DSS-MUSIC and OMP-based Algorithms 50 5.1.2 RMSE Performance versus SNR and Snapshots between 2DSS-MUSIC and OMP-based Algorithms 55 5.2 Performance Evaluation versus SNR and Snapshots with Doppler Frequency based on Iterative Estimation 57 5.2.1 With Doppler Compensation and without Doppler Compensation Comparison 58 5.2.2 Doppler RMSE Performance versus SNR between 2DSS-MUSIC and OMP-based Algorithms 59 5.2.3 2D-DoA RMSE Performance versus SNR between 2DSS-MUSIC and OMP-based Algorithms 64 5.2.4 Doppler RMSE Performance versus Snapshots between 2DSS-MUSIC and OMP-based Algorithms 68 5.2.5 2D-DoA RMSE Performance versus Snapshots between 2DSS-MUSIC and OMP-based Algorithms 72 5.3 Computational Time Comparison 76 6 Conclusion 77 7 Future Work 78 7.1 Multipath Scenario 78 7.2 More Discussion on Sparse Arrays 79 Bibliography 79 A Derivation of the Equivalent Least Squares 90 B Inversion of the Block Matrix 93 | - |
| dc.language.iso | en | - |
| dc.title | 基於時分複用多進多出雷達使用非均勻天線陣列進行迭代二維來向角和多普勒估計 | zh_TW |
| dc.title | Iterative Two-dimensional Direction of Arrival and Doppler Estimation based on Time-division Multiplexing MIMO Radar with Non-uniform Arrays | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 馮世邁;劉俊麟;黃彥銘 ;蔡尚澕 | zh_TW |
| dc.contributor.oralexamcommittee | See-May Phoong;Chun-Lin Liu;Yenming Huang;Shang-Ho Lawrence Tsai | en |
| dc.subject.keyword | 時分複用多進多出雷達,非均勻天線陣列,壓縮感知,二維欠定來向角估測,迭代估計的方法, | zh_TW |
| dc.subject.keyword | TDM MIMO radar,Non-uniform arrays,Compressive sensing,Underdetermined 2D-DoA estimation,Iterative estimation scheme, | en |
| dc.relation.page | 95 | - |
| dc.identifier.doi | 10.6342/NTU202303626 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2023-08-11 | - |
| dc.contributor.author-college | 電機資訊學院 | - |
| dc.contributor.author-dept | 電信工程學研究所 | - |
| dc.date.embargo-lift | 2028-08-02 | - |
| 顯示於系所單位： | 電信工程學研究所 | |
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