(3.232.129.123) 您好!臺灣時間:2021/03/05 23:47
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:蔡明汎
研究生(外文):Ming-Fan Tsai
論文名稱:差分解碼相位正交解調器設計
論文名稱(外文):I/Q Demodulator Design Based on Differential Decoding Method
指導教授:蔡智明蔡智明引用關係
指導教授(外文):Chih-Ming Tsai
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電機工程學系碩博士班
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:2002
畢業學年度:90
語文別:中文
論文頁數:82
中文關鍵詞:混波器振盪器鍵控調相
外文關鍵詞:PEK
相關次數:
  • 被引用被引用:0
  • 點閱點閱:377
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:38
  • 收藏至我的研究室書目清單書目收藏:0
在同調解調接收機中,因需要一同調載波才能有效的解調出信號,所以必須很確切的知道解調載波的相位是否和發射載波同步,而這樣的電路一般會使用鎖相迴路來實現,軻斯塔迴路就是利用兩個平行的鎖相迴路來解調信號,但在非同調解調接收機中,利用差分編碼和解碼的技巧,將信號載在前後兩個發射信號之間的相位差,如此就可以在未知載波信號相位的情形下,也能成功的解調出信號,並簡化接收機的電路複雜度。
本論文主要分為以下四個部分:第一部份為解調器的解調原理和系統架構。第二部分為本地振盪器的設計,這裡我們使用半集總元件來設計我們的振盪電路。第三部分為降頻混波器的設計,我們在此使用疊加組態來改善本地振盪埠對高頻埠的隔離度。第四部分為系統模擬和實作量測,比較利用類比乘法器解調的相位正交解調器和利用數位乘法器解調的相位正交解調器的錯誤率。此種調變解調的方法也可以應用到更高位元的調變解調上。
In coherent demodulation, a coherent carrier is needed to demodulate signal successfully. Phase-locked loop can be used to realize the phase synchronization. For example, Costas loop uses two parallel phase-locked loop to recover the carrier. On the other hand, in noncoherent demodulation, one may use differential coding and decoding techniques to demodulate signal without knowing exact carrier phase. This will greatly simplify the circuit.

In the thesis, firstly the demodulation theory and circuit topology are given. Then, oscillator circuit design using semi-lump elements is presented. Next, cascode topology are used in mixer design to improve LO-to-RF isolation. Finally, the result of system simulations and experiments are given. The bit error rate of I/Q demodulator using analog multiplier is compared to that using digital multiplier. The modulation and demodulation technique proposed in this research are also suitable for other M-ary signal modulation and demodulation.
目錄
第一章 簡介…………………………………………………………….1
1-1 研究動機…………………………………………………1
1-2 章節概述…………………………………………………2
第二章 解調原理及系統架構………………………………………….3
2-1 鍵控移相…………………………………………………3
2-1-1 發射端的調變器…………………………………3
2-1-2 軻斯塔解調迴路…………………………………5
2-2 鍵控調相…………………………………………………6
2-2-1 發射端的調變器…………………………………6
2-2-2 接收端的解調器…………………………………9
2-3 錯誤率的分析……………………………………………16
2-4 時間誤差和混波器的不匹配……………………………20
2-5 幾種不同的接收機架構…………………………………26
2-5-1 同調延遲解調器…………………………………26
2-5-2 利用FM檢波器的解調器………………………28
第三章 振盪器………………………………………………………..30
3-1 振盪器設計原理…………………………………………31
3-1-1 振盪原理…………………………………………31
3-1-2 諧振電路及輸出負載位置的選擇………………33
3-2 低相位雜訊振盪器的電路設計…………………………35
3-2-1 雜訊來源…………………………………………35
3-2-2 低相位雜訊振盪器的設計要點…………………38
3-3 實際電路模擬和實作……………………………………39
第四章 混波器…………………………………………………………50
4-1 混波器的基本原理和參數要求…………………………50
4-1-1 混波原理…………………………………………50
4-1-2 基本參數的要求…………………………………51
4-2 主動混波器………………………………………………54
4-2-1 單一電晶体的混波器……………………………55
4-2-2 疊加組態的混波器………………………………56
4-3 混波器參數的量測………………………………………58
4-4 混波器的模擬和實作量測………………………………59
4-4-1 單一電晶体混波器的製作………………………59
4-4-2 疊加組態的混波器………………………………62
第五章 模擬與量測……………………………………………………67
5-1 系統模擬…………………………………………………67
5-2 系統量測…………………………………………………73
第六章 結論與展望……………………………………………………80
參考文獻………………………………………………………………81
參考文獻

[2.1] F. G.. Jenks, P. D. Morgan, Christopher S. Warren, “Use of Four-Level Phase Modulation for Digital Mobile Radio”IEEE Transactions on Electromagnetic Compatibility, Vol. EMC-14, No4, November 1972.
[2.2] Simon Haykin, Communication Systems, Third Edition, Wiley, 1994
[2.3] Leonard E. Miller, Jhong S. Lee, “BER Expressions for Differentially Detected pi/4 DQPSK Modulation”, IEEE Transactions on Communications, Vol.46, No1, January, 1998
[2.4] Kamran Kiasaleh, Tao He, “On the Performance of DQPSK Communication Systems Impaired by Timing Error, Mixer Imbalance, and Frequency Nonselective Slow Rayleigh Fading”, IEEE Transactions on Vehicular Technology, Vol.46, No.3, August 1997
[2.5] R. F. Pawula, S. O. Rice, J. H. Roberts, “Distribution of the Phase Angle Between Two Vectors Perturbed by Gaussian Noise”, IEEE Transactions on Communications, Vol. Com-30, No. 8, August 1982
[2.6] Hyuck M. Kwon, Ali Haghnegahdar, “Pi/4-DQPSK Signaling with Baseband Zero-Crossing Demodulator”, IEEE Global Telecommunications Conference, Vol.1, 1997
[2.7] Steven H. Goode, Henry L. Kazecki, Donald W. Dennis, “A Comparison of Limiter-Discriminator, Delay and Coherent Detection for pi/4 QPSK”, IEEE 40th Vehicular Technology Conference, 1990
[3.1] Guillermo Gonzalez, Microwave Transistor Amplifiers Analysis and Design, Second Edition, Prentice Hall, 1997
[3.2] Steve Hamilton, “Microwave Oscillator Circuits”, Microwave Journal, pp.63-84 April, 1978
[3.3] M. J. Underhill, “Reduction of phase noise in single transistor oscillators”, IEEE Conference Publication, No.418, March 1996
[3.4] Roger Muat, “Designing Oscillators for Spectral Purity”, Microwave&RF, pp.133-142, July, 1984
[3.5] Steve Hamilton, “FM and AM Noise in Microwave Oscillators”, Microwave Journal, pp.105-109, June, 1978
[3.6] Roger Muat, “Choosing Devices for Quiet Oscillators”, Microwave&RF, pp.166-170, August, 1984
[3.7] George D. Vendelin, Anthony M. Pavio, Ulrich L. Rohde, Microwave Circuit Design Using Linear and Nonlinear Techniques, Wiley, 1990
[3.8] S. Alechno, “Analysis Method Characterizes Microwave Oscillators, Oscillator Analysis, Part 2,” Microwaves & RF, pp.125-136, Dec. 1997
[3.9] S. Alechno, “Analysis Method Characterizes Microwave Oscillators, Oscillator Analysis, Part 4,” Microwaves & RF, pp.65-72, Jan. 1998.
[4.1] Stephen A. Maas, Microwave Mixers, Second Edition, Artech House, 1993
[4.2] David M. Pozar, Microwave Engineering, Second Edition, Wiley, 1998
[4.3] George D. Vendelin, Anthony M. Pavio, Ulrich L. Rohde, Microwave Circuit Design Using Linear and Nonlinear Techniques, Wiley, 1990
[4.4] P. Bura, R. Dikshit, “FET Mixers for Communication Satellite Transponders”, IEEE MTT-S International Microwave Symposium Digest, 1976
[5.1] F. G.. Jenks, P. D. Morgan, Christopher S. Warren, “Use of Four-Level Phase Modulation for Digital Mobile Radio”IEEE Transactions on Electromagnetic Compatibility, Vol. EMC-14, No4, November 1972
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔