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系統識別號 U0026-2908201813460400
論文名稱(中文) 在複雜環境中應用相位累增與最大似然估計法以提升調頻連續波雷達系統之生理訊號及定位量測精準度
論文名稱(英文) Using Phase Accumulation Demodulation and Maximum Likelihood Estimation to Improve the Accuracy of Vital Signs and Range Detection in Cluttered Environments for FMCW Radar Systems
校院名稱 成功大學
系所名稱(中) 電機工程學系
系所名稱(英) Department of Electrical Engineering
學年度 106
學期 2
出版年 107
研究生(中文) 張瑋芳
研究生(英文) Wei-Fang Chang
學號 N26051827
學位類別 碩士
語文別 中文
論文頁數 69頁
口試委員 指導教授-楊慶隆
口試委員-鄭國順
口試委員-黃尊禧
口試委員-張嘉展
口試委員-李杰森
中文關鍵字 頻率調變連續波雷達  相位累增解調  最大似然估計法  心跳頻率  呼吸頻率  生理訊號 
英文關鍵字 frequency modulated continuous wave (FMCW)  phase accumulation demodulation (PAD)  maximum likelihood estimation (MLE)  heart rate (HR)  respiratory rate (RR)  vital sign 
學科別分類
中文摘要 本篇論文採用相位累增解調(Phase accumulation demodulation, PAD)技術用以分析5.8 GHz 調變連續波(Frequency modulation continuous wave, FMCW)雷達系統架構所獲取之訊號,使得在複雜環境中依然可以準確量測到生理訊號,並且使用最大似然估計法(Maximum likelihood estimation, MLE)將強環境干擾消除以還原因環境干擾而壓抑之生理訊號變化。除此之外,相位累增解調技術亦對噪聲有較大的容忍度,因此相較傳統使用複數訊號解調,此方法可以不需要以delay-line或是提高頻率調變斜率等方式提高拍頻訊號之頻率,使得系統得以朝可攜式系統進一步發展。實驗設計分為一維金屬板測距、無強環境干擾之生理量測與以金屬板做為干擾訊號之生理訊號量測。最後,在沒有delay-line的情境之下,使用相位累增解調技術之一維測距結果0.5 m至 3.05 m之平均誤差約為4.69 %,其結果與在相同操作頻率下使用delay-line之複數訊號解調結果相近。另外,在無環境干擾之生理訊號量測中,解調出心跳誤差率約為0.24 %;在有環境干擾之情境下,最大心跳誤差亦小於2.25 %。
英文摘要 This paper presents a noise tolerable method for FMCW radar systems to detect vital sign under strong reflected interference signals of stationary clutter. By using phase accumulated demodulation, vital sign detection can be demodulated clearly even under existence of strong clutters influence, and noise can be decreased so that the delay-line can be reduced for the compact system implementation. Moreover, the maximum likelihood estimation used to decrease the influence of the clutter. From the measurement results, the measured absolute range has 4.69% error from 0.5 m to 3.05 m in average. Moreover, the vital sign is 2.25% and 1.49% error with stationary clutter interferer 0.75 m and 1.3 m behind the human target.
論文目次 目錄 IX
表目錄 XI
圖目錄 XII
第一章 序論 1
1.1 研究背景 1
1.2 文獻探討 3
1.2.1 近年非接觸式生理訊號量測的進展 3
1.2.2 非接觸式生理訊號量測雷達的訊號解調方式 5
1.2.3 精準震動位移量測 5
1.2.4 靜止雜波對生理訊號的影響及解決方式 7
1.3 研究動機與目標 8
1.4 論文架構與貢獻 9
第二章 頻率調變連續波雷達系統理論分析 10
2.1 頻率調變連續波雷達量測理論分析 10
2.2 相位累增法理論分析 11
2.2.1 相位累增法測距分析 11
2.3 強反射之環境靜止雜波分析 14
2.4 最大似然估計法消除環境靜止雜波 16
第三章 頻率調變連續波雷達系統架構 20
3.1 5.8 GHz 雷達系統功率預算 23
3.2 5.8 GHz 雷達系統子電路 27
3.2.1 壓控振盪器 27
3.2.2 功率放大器 29
3.2.3 分波器 30
3.2.4 5.8 GHz 2x2 陣列收發天線 31
3.2.5 低雜訊放大器與增益模組 32
3.2.6 正交混頻器 40
3.2.7 訊號擷取卡 42
第四章 實驗架設與結果討論 43
4.1 實驗架設 43
4.1.1 金屬板一維距離量測之架設 43
4.1.2 生理訊號量測之架設 44
4.2 金屬板一維測距之實驗結果 45
4.2.1 一維測距訊號解調流程 45
4.2.2 金屬板一維測距之實驗結果 49
4.3 生理訊號解調與量測結果 53
4.3.1 生理訊號解調流程 53
4.3.2 生理訊號量測結果與討論 58
第五章 結論與未來展望 64
5.1 結論 64
5.2 未來展望 65
REFERENCE 66
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