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研究生:洪梓城
研究生(外文):Tzu-Cheng Hung
論文名稱:DS/SS-OQPSK通訊系統模擬
論文名稱(外文):Simulation of DS/SS-OQPSK Communication System
指導教授:劉慶華劉慶華引用關係
指導教授(外文):Ching-Hwa Liu
口試委員:劉峻華劉慶華楊耀波周瑞雄
口試委員(外文):Jiunn-Hwa LiuChing-Hwa LiuYaw-Po YangJui-Hsiung Chou
口試日期:2012-07-10
學位類別:碩士
校院名稱:中華科技大學
系所名稱:電子工程研究所碩士班
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:2012
畢業學年度:100
語文別:中文
論文頁數:54
中文關鍵詞:直序展頻偏移正交相移鍵控Gold序列Kasami序列
外文關鍵詞:DS/SSOQPSKGold SequenceKasami Sequence
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本論文針對直接序列展頻(Direct Sequence Spread Spectrum;DS/SS)偏移正交相移鍵控(Offset Quadrature Phase Shift Keying;OQPSK)通訊系統進行建置與信號模擬分析。
本研究先探討DS/SS-OQPSK通訊系統之原理及架構,並以Visual Studio之C#軟體為開發工具,對DS/SS-OQPSK通訊系統進行設計、模擬與驗證。在發射端部分,以同相位(In-Phase)與正交相位(Quadrature-Phase)兩分路分別採用Gold與Kasami序列,對輸入資料進行展頻碼運算;接著將I與Q分路訊號資料,以OQPSK方式調變,即為本系統模擬之發射信號。在接收端訊號部分,先用非同調(Non-Coherent)與解展頻方式完成接收訊號運算,且同時加入白色高斯雜訊(White Gaussian Noise;WGN)通道的影響;然本文另也對同步問題,如鎖相迴路(Phase-Locked Loop;PLL)、擷取(Acquisition)及追蹤(Tracking)分別作分析探討。最後本論文在WGN干擾環境下建置之DS/SS-OQPSK通訊系統,可正確地模擬還原二位元序列資料信號。

This paper constructs the Direct Sequence Spread Spectrum(DS/SS)-Offset Quadrature Phase Shift Keying (OQPSK) communication system and conducts signal simulation analysis.
First, it discusses the principle and architecture of the DS/SS-OQPSK communication system, which then designs, simulates and verifies the system by taking the Visual Studio C# software as the development tool. The transmitter then computes the spread spectrum codes for the input data during the In-Phase and Quadrature-Phase by adopting the Gold sequence and Kasami sequence respectively. It then modulates the signal data in branch I and Q by the means of OQPSK, which transmits the signal simulated by this system. At the receiver, it initially carries out the received signal then computes the non-coherent and despread spectrum means, which adds to the interference of White Gaussian Noise (WGN) channel. It also analyzes and explores the synchronization problems such as Phase-Locked Loop (PLL), Acquisition and Tracking respectively. Finally, the DS/SS-OQPSK communication system discussed in this paper, which is conducted in the WGN interference environment, can simulate and restore the binary sequence data signal correctly.

摘要 i
ABSTRCT ii
目次 iii
表目錄 v
圖目錄 vi
第一章 緒論 1
第一節 研究背景與動機 1
第二節 文獻探討 2
第三節 論文架構 3
第二章 DS/SS-OQPSK通訊系統 4
第一節 PN序列與特性 5
壹、PN序列 5
貳、PN序列之特性 7
第二節 Gold序列 9
壹、選擇Gold序列演算法 11
貳、優選對與劣選對之性能比較 12
第三節 Kasami序列 14
第四節 DS/SS-OQPSK發射機 16
第五節 DS/SS-OQPSK接收機 19
第三章 AGWN通道與同步問題探討 20
第一節 AWGN通道 20
第二節 同步問題的探討 21
壹、鎖相迴路(Phase-Locked Loop;PLL) 21
貳、直序展頻同步 28
參、擷取 29
肆、追蹤 34
第四章 DS/SS-OQPSK系統模擬與分析 36
第一節 發射信號模擬與分析 37
第二節 接收信號模擬與分析 42
第五章 結論與未來發展方向 50
第一節 結論 50
第二節 未來發展方向 51
参考文獻 52
作者簡介 54
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[10]W. W. Peterson, “Error Correcting Codes”, MIT Press, Wiley, New York. 1972.

[11]J. G. Prokis, “Digital Communications 5th ed. ”, McGraw-Hill, 2001.

[12]Davenport W. B. and Root W. L., ”Random Signals and Noise”, McGraw-Hill book Company, New York, 1958.

[13]Viterbi, A. J., ”Principles of Coherent Communications”, McGraw-Hill book Company, New York, 1966.

[14]Bernard Sklar, “Digital Communications: Fundamentals and Applications”, Prentice Hall Inc., 2001.

[15]Simon, M. K., Omura, J. K., Scholtz, R. A., and Levitt, B. K., “Spread Spectrum Communication”, Computer Science Press, Inc., Rockville, Md., 1985.

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[17]On the Scheme of Rapid Acquisition of Long PN Code in DSSS Signals 2009 International Conference on Communications and Mobile Computing.

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