本篇論文提出了頻率位移式自我注入鎖定（FOSIL）雷達，通過兩個下混頻器和一個上混頻器將兩個獨立的SIL雷達前端結合在一起，適當地調整兩個振盪器的注入相位和注入振幅，可以使整體系統發射頻率保持恆定。因此，解決了在傳統SIL雷達中感測受測者時的產生的電磁干擾（EMI）問題，並且允許在有限的頻寬內共存多個FOSIL雷達。
此外，本論文使用了數位頻率解調機制的RF混頻器來提取目標相對於雷達的運動資訊，從而降低了系統複雜性，並消除了I/Q不平衡以及直流位移校正的程序。由於減輕了閃爍雜訊並具有較大的都卜勒頻移，系統的SNR顯著提高，可達28 dB。在非接觸式的生理徵象感測實驗中，5.8 GHz ISM頻段FOSIL雷達雛型電路的感測範圍為8公尺，且頻率擺動範圍降低了96％以上。此外，兩個頻率間隔為2 MHz的FOSIL雷達可以分別在同一時間和實驗環境下提供兩個受測者的精確心肺活動。

This paper proposes a frequency-offset self-injection-locked (FOSIL) radar, which combines two independent SIL radar front-ends via two down mixers and one up mixer. The transmit frequency can remain constant by properly adjusting injection phases and amplitudes of two oscillators. Therefore the electromagnetic interference (EMI) issue when monitoring a moving subject in conventional SIL radars is resolved, and multiple FOSIL radars are allowed to coexist within a limited bandwidth.
Moreover, this work adopts one RF mixer with digital frequency demodulation method to extract the target motion relative to the radar, reducing the system complexity and eliminating I/Q imbalance and dc offset calibration. Due to the mitigated flicker noise and large Doppler shift, the system SNR is significantly improved by 28 dB. In the noncontact vital sign sensing experiments, the 5.8 GHz ISM band FOSIL radar prototype had a sensing range of 8 m, and reduced the frequency swing range over 96%. Moreover, two FOSIL radars with 2 MHz frequency spacing can respectively provide exact cardiopulmonary activities of two aimed subjects at the same time and experimental environment.

論文審定書..................................................................................................................... i
致謝............................................................................................................................... ii
摘要............................................................................................................................... iv
Abstract ......................................................................................................................... v
圖次.............................................................................................................................. vii
表次............................................................................................................................... ix
第一章 序論................................................................................................................ 1
1.1研究背景與動機 .................................................................................................. 1
1.2 文獻回顧 ............................................................................................................. 4
1.3 章節安排 ............................................................................................................. 6
第二章 系統架構........................................................................................................ 7
2.1自我注入鎖定雷達簡介 ...................................................................................... 7
2.2 頻率位移式自我注入鎖定雷達系統架構暨理論推導 ..................................... 9
第三章 低中頻架構之數位頻率解調器 ................................................................... 17
3.1數位頻率解調器之原理 .................................................................................... 17
3.2數位頻率解調器之模擬與驗證 ........................................................................ 20
3.2.1 Simulink之頻率解調模擬 ......................................................................... 21
3.2.2 ESG之頻率解調驗證 ................................................................................ 26
第四章 實驗結果........................................................................................................ 29
4.1 雷達之SNR改進量測實驗 ............................................................................. 31
4.2 生理感測實驗 ................................................................................................... 32
4.3 多雷達生理感測實驗 ....................................................................................... 34
4.4 生理感測心跳率可靠性測試實驗 ................................................................... 39
第五章 結論................................................................................................................ 46
參考文獻...................................................................................................................... 47

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