UHF/VHF 立方衛星無線通訊系統開發平台

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姓名

葉丞偉(Cheng-Wei Ye) 查詢紙本館藏

畢業系所

光機電工程研究所

論文名稱

UHF/VHF 立方衛星無線通訊系統開發平台
(UHF/VHF dual band transceiver development platforms for CubeSat)

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摘要(中)

本論文以開發適用於立方衛星(Cube Satellite)之半雙工雙頻無線電模組為目標，系統均以COTS(Commercial Off-The-Shelf)元件設計與實現，通訊規格參考主流業餘無線電立方衛星協議與調變模式，開發144-146Mhz、435-438Mhz雙頻段收發機模組。

文中研議通訊系統與射頻系統的規格需求，設計無線電射頻與基頻系統硬體，包括微控制器，射頻調變晶片，低雜訊放大器及功率放大器，並分析計算其中各項子系統與整體系統的理論性能，供後續驗證參考。

最後透過各個次系統的性能實驗驗證，整體通訊誤碼驗證，估測此無線電收發機系統理論性能，於誤碼率10^-4時可達-118dBm，接收EIRP為50dBm的地面站發射之訊號，UHF與VHF最大通訊距離分別為6913公里與19977公里。

摘要(英)

In this paper, we focus on development of half-duplex dual band radio module for CubeSat, support 144-146MHz and 435-438MHz radio band. The system is designed and implemented from COTS, Commercial Off-The-Shelf, component, which specification follows the mainstream amateur packet radio protocol.

With research the specification requirements of communication system, we design the hardware of radio and base band system, including microcontroller, RF modulation chip, low noise amplifier and power amplifier. Then we analyze and calculate the theoretical performance of each subsystem and the whole system, which is for reference of subsequent verification.

In the end of paper, we verify the performance of subsystem and the overall transmission performance. Prove that the transceiver system can be achieved at BER of 〖10〗^(-4) with a signal strength 118dBm. In addition, the signal transmitted by the ground station with EIRP of 50dBm is received. The maximum communication distance of UHF and VHF are 6913 km and 19977 km respectively.

關鍵字(中)

★ 立方衛星
★ 無線通訊
★ 追蹤遙測及控制

關鍵字(英)

★ CubeSat
★ wireless communication
★ TT&C

論文目次

中文摘要 i
ABSTRACT ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 ix
一、緒論 1
1-1 研究動機與目的 1
1-2 文獻回顧 2
1-3 研究構想 4
二、理論與技術基礎 5
2-1 電波特性 5
2-1-1 傳播路徑 5
2-1-2 衛星通訊都普勒效應 6
2-1-3 頻譜分類與發射規範 8
2-1-4 自由空間路徑衰減模型 11
2-2 調變原理 12
2-2-1 類比調變 12
2-2-2 數位調變 16
2-3 無線電模型 17
2-3-1 等效全向輻射功率(EIRP) 17
2-3-2 訊雜比(SNR)與雜訊指數(NF) 18
2-3-3 通道容量與誤碼率 20
三、系統架構規劃與設計 22
3-1 系統規劃 22
3-1-1 調變協議 22
3-1-2 射頻頻段 23
3-1-3 頻道頻寬 23
3-1-4 射頻輸出功率 24
3-1-5 接收靈敏度 25
3-1-6 通訊介面 26
3-2 系統配置 27
3-2-1 衛星通訊次系統 27
3-2-2 地面站電台系統 28
3-3 系統功能方塊 29
3-3-1 基頻功能方塊 29
3-3-2 射頻功能方塊 31
3-4 具體實現 34
3-4-1 傳輸線設計 37
3-4-2 無線電調變、解調電路 40
3-4-3 低雜訊放大器 44
3-4-4 功率放大器 45
3-4-5 RF多工器 47
3-4-6 諧波濾波電路 47
3-4-7 數位電路 49
四、系統性能驗證與數據分析 53
4-1 系統元件性能量測 53
4-1-1 驗證諧波濾波器(Harmonic Filter)設計 53
4-1-2 驗證功率放大器(PA)設計 59
4-1-3 低雜訊放大器(LNA) 68
4-1-4 平衡不平衡轉換器(BALUN) 74
4-2 無線電傳輸系統功能及性能驗證 81
4-2-1 鏈路分析 81
4-2-2 發射效能驗證 86
4-2-3 接收效能驗證 94
五、結論與未來展望 99
5-1 結論 99
5-2 未來展望 99
參考文獻 100

參考文獻

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指導教授

葉則亮(Tse-Liang Yeh)

審核日期

2019-7-16

推文