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研究生:杜孟哲
研究生(外文):Meng-Che Du
論文名稱:採用極座標調制之射頻發射機
論文名稱(外文):RF Transmitters Using Polar Modulation
指導教授:洪子聖洪子聖引用關係
指導教授(外文):Tzyy-Sheng Horng
學位類別:碩士
校院名稱:國立中山大學
系所名稱:電機工程學系研究所
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:2004
畢業學年度:92
語文別:中文
論文頁數:77
中文關鍵詞:S類功率放大器波包消除重建發射機採用極座標調制之射頻發射機
外文關鍵詞:RF Transmitters Using Polar ModulationClass-S Power AmplifierEnvelope Elimination and Restoration Transmitter
相關次數:
  • 被引用被引用:7
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改良傳統波包消除重建發射機架構,捨棄了萃取波包與相位訊號的偵測器與限制器等類比元件,改以數位訊號處理之極座標轉換技術取代,並對波包訊號採取差異積分調制,可抑制量化雜訊並適合單晶片系統化。發射機前端功率放大器電路部分,採用高效率S類功率放大器與E類功率放大器設計,分別放大波包與相位訊號並加以結合。採用極座標調制之射頻發射機技術在傳送高PAPR值之數位調制載波訊號時,具有超高效率與良好線性度等優點,以實際傳送1 Msps QPSK調制之900 MHz載波訊號為例,在發射功率超過23 dBm時量測所得之轉換效率高達60%,ACPR值大於34dB,EVM值小於6.5%。
This thesis improved the structure of traditional envelope elimination and restoration transmitter by replacing the analog components of envelope detector and limiter using digital processing technique of polar transformation. Envelope signal was modulated by delta-sigma modulation, which could suppress the quantization noise and would be good for integrated circuit design. The front end analog circuits of transmitter used high efficiency class-S and class-E power amplifiers to amplify envelope and phase signal separately and finally combined them at the output of class-E power amplifier. The RF transmitters using polar modulation had advantages of high efficiency and linearity when transmitting high PAPR-valued digital modulation signals. For example, when transmitting the QPSK-modulated signal with 900MHz carrier and 1Msps data rate, the transmitter was measured with efficiency as high as 60%, ACPR above 34dB, and EVM less than 6.5%.
第一章 緒論
1.1 背景簡介
1.2 章節規劃
第二章 相位路徑與波包路徑設計
2.1 相位路徑設計
A. 理想E類功率放大器架構簡介
B. 混合式E類功率放大器設計與量測
2.2 波包還原路徑設計
2.2.1 差異積分調制簡介
2.2.2 切換式直流轉換器簡介
A. Buck type切換式直流轉換器
B. Boost type切換式直流轉換器
C. BuckBoost type切換式直流轉換器
2.2.3 S類功率放大器
A. S類功率放大器模擬
B. 混合式S類功率放大器量測
C. TSMC 0.18μm製程S類功率放大器設計與量測
第三章 採用極座標調制之射頻發射機架構模擬
3.1 兩路時間延遲差理論分析
3.2 系統整合模擬
3.2.1 傳播時間延遲差
3.2.2 超額取樣率
3.3 採用極座標調制之射頻發射機數位調制模擬
A. 500k symbols/s QPSK
B. 1M symbols/s QPSK
C. 500k symbols/s π/4-DQPSK
第四章 採用極座標調制之射頻發射機量測
4.1 雙調連續訊號測試之理論分析
4.2 雙調連續訊號測試之量測結果
A. 理想波包訊號下之混合式E類功率放大器量測
B. 混合式S類功率放大器所產生之波包訊號下之E類功率放大器量測
4.3 數位調制訊號測試之量測結果
4.3.1 基頻資料率500k symbols/s之QPSK調制訊號測試
A. 理想波包訊號下之發射機輸出訊號量測
B. 混合式S類功率放大器所產生之波包訊號下之發射機輸出訊號量測
4.3.2 基頻資料率1M symbols/s之QPSK調制訊號測試
4.3.3 基頻資料率500k symbols/s之π/4-DQPSK調制訊號測試
4.4 發射機量測與模擬結果列表比較
A 雙調連續訊號測試
B. QPSK數位調制訊號測試
C. π/4-DQPSK數位調制訊號測試
第五章 結論
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