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研究生:陳宇翔
研究生(外文):Yu-Hsiang Chen
論文名稱:三通道相位干涉儀之頻率調變連續波訊源定向研究
論文名稱(外文):Angle of Arrival Estimation of One Frequency Modulated Continuous-Wave Signal Using Three Channel Interferometer
指導教授:劉馨勤
指導教授(外文):Hsin-Chin Liu
口試委員:陳永芳黃紹華張立中劉馨勤
口試委員(外文):Yung-Fang ChenShaw-Hwa HwangLi-Chung ChangHsin-Chin Liu
口試日期:2018-07-27
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電機工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:中文
論文頁數:52
中文關鍵詞:來向角估測頻率調變連續波相位干涉儀天線互感耦合
外文關鍵詞:AOA estimationFrequency Modulated Continuous-WaveInterferometermutual coupling
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  • 被引用被引用:1
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本論文針對三通道相位干涉儀對於未知頻率參數之頻率調變連續波(Frequency Modulated Continuous-Wave,FMCW)進行定向研究,首先以低複雜度之短時距傅立葉轉換方式(Short-Time Fourier Transform,STFT)進行時頻分析(Time-Frequency analysis)偵測頻率調變連續波訊號參數,並利用三通道相位干涉儀完成來向角估測。本論文以Matlab軟體產生頻率調變連續波作為訊號源並進行模擬,針對頻率調變連續波對於來向角估測的影響及分析,驗證此來向角估測方式之效能,除此之外,本論文使用三支偶極天線組成非均勻線性陣列天線,並使用美商國家儀器公司(National Instruments,NI)所開發之軟體無線電平台—向量收發器(Vector Signal Transceiver,VST)來完成三通道相位干涉儀之實作,並於微波無反射實驗室以三通道相位干涉儀對不同掃頻時間(Sweep repetition time)的頻率調變連續波進行量測及分析。除此之外,本論文針對實際量測中,因陣列天線間的互感耦合(Mutual Coupling)效應所引起的非完美陣列響應所造成來向角估測效能低落問題,以基於查表法的頻率—空間陣列校正法,有效的降低因互感耦合效應造成估測誤差之問題。根據量測結果分析顯示,本論文能成功以三通道相位干涉儀對頻率調變連續波進行來向角估測。
In the thesis, we develop a three channel interferometer Anaogle of Arrival (AOA) estimatior fot Frequency Modulated Continuous-Wave (FMCW) signal. First, we use a low complexity short-time Fourier transform time-frequency analysis , to detect the parameters of FMCW signal. Then we use the three channel interferometer to perform AOA estimation. We use a simulated FMCW signal generated by MATLAB software to verify the performance of the AOA estimatior, and discuss the AOA estimation error caused by the modulation factor. Additionally, we implement a three channel interferometer on a software defined radio platform using Vector Signal Transceiver of National Instruments, which connects a uniform linear antenna array composed of three dipole antenna elements. We have also carried out experiments in a microwave anechoic chamber. In this work, a frequency – space array calibration procedure based on a lookup table of three channel interferometer effectively suppress the estimation error due to the mutual coupling effect that severely degrade the performance of AOA estimation. Measurement results show that the three channel interferometer can successfully estimate the direction of a FMCW signal source.
摘要 I
ABSTRACT IV
致謝 V
目錄 VI
圖目錄 VII
表目錄 VIII
符號索引 IX
第1章 緒論 1
1.1研究動機與目的 1
1.2論文貢獻 1
1.3章節概要 2
第2章 文獻探討 3
2.1頻率調變連續波訊號參數偵測 3
2.2來向角估測方法 4
2.3互感耦合效應(MUTUAL COUPLING EFFECTS) 7
2.4 CRAMER-RAO LOWER BOUND (CRLB) 9
第3章 頻率調變連續波訊源來向角估測系統 10
3.1 頻率調變連續波訊號模型 10
3.2 向量訊號收發器 10
3.3 估測方法及系統架構 11
3.4 三通道相位干涉儀之頻率調變連續波定向研究 19
第4章 模擬與分析結果 21
4.1 時頻分析方法 21
4.2 三通道相位干涉儀估測方法 24
4.3 頻率調變連續波估測分析 25
4.4 實驗設計與分析結果 27
4.4.1 儀器校正及天線場型量測 29
4.4.2 三通道相位干涉儀來向角估測效能實驗 31
第5章 結論與未來研究方向 38
參考文獻 39
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