跳到主要內容

臺灣博碩士論文加值系統

(44.221.70.232) 您好!臺灣時間:2024/05/30 20:13
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

: 
twitterline
研究生:汪庭鋒
研究生(外文):Wang, Ting-Feng
論文名稱:以數位訊號處理器開發平臺實現正交分頻多工通訊系統
論文名稱(外文):Implementation of OFDM Communication System using DSP Development Platform
指導教授:洪賢昇
指導教授(外文):Hung, Hsien-Sheng
口試委員:洪茂盛林進豐洪賢昇
口試委員(外文):Hung, Mao-ChengLin, Chin-FengHung, Hsien-Sheng
口試日期:2015-06-16
學位類別:碩士
校院名稱:國立臺灣海洋大學
系所名稱:電機工程學系
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:2015
畢業學年度:103
語文別:中文
論文頁數:50
中文關鍵詞:正交分頻多工數位訊號處理器相位調變音訊晶片位元錯誤率
外文關鍵詞:Orthogonal frequency division multiplexingDigital signal processorPhase modulationAudio chipBit error rate
相關次數:
  • 被引用被引用:0
  • 點閱點閱:195
  • 評分評分:
  • 下載下載:47
  • 收藏至我的研究室書目清單書目收藏:0
本論文以數位訊號處理器(DSP)開發平臺完成正交分頻多工(OFDM)通訊系統之設計與實現。開發平臺為德州儀器之TMS320C6416 DSP Starter Kit開發套件,包含McBSP多通道緩衝串口、TLV320AIC23音訊編解碼晶片,以及Code Composer Studio(CCS)開發環境。通訊系統的軟體程式設計是使用CCSv3.3開發軟體,以C語言編譯,但在CCS編譯須完全符合ISO標準,否則無法順利編譯與執行。
傳送機部分先由使用者輸入欲傳送之文字,藉由ASCII編碼並轉換成二進制,經由QPSK調變後將訊號作反快速傅立葉轉換並加入保護區間完成OFDM訊號調變,最後由AIC23-HEADPHONE產生雙聲道音源。接收機部分為傳送機的相反方式解調,先由AIC23-MIC取回訊號,以數位訊號處理器找出訊號起始點後,對其後截取到的訊號移除保護區間,再作快速傅立葉轉換及QPSK硬式決策後取回二進制訊號。實驗結果顯示位元錯誤率大約10%左右,不甚理想,究其原因可能是周圍環境與電腦所發出的低頻雜音造成影響。


關鍵字:正交分頻多工、數位訊號處理器、相位調變、音訊晶片、位元錯誤率。

In this thesis, a communication system with orthogonal frequency division multiplexing (OFDM) is designed and implemented using a digital signal processor (DSP) development platform. We use TI’s TMS320C6416 DSP Starter Kit (DSK) as the development platform which consists of multi-channel buffered serial port, TLV320AIC23 audio codec chip, and Code Composer Studio (CCS). Design of communication system’s software routines is accomplished using C programming language which is compiled in CCSv3.3 development software. But in the CCS compiler, C programming language must fully comply with ISO C’s standards; otherwise, it can’t be successfully compiled and executed.
Transmitter involves several steps of signal processing. Firstly, texts to be transmitted are entered by the user and converted into binary codes with ASCII encoding. Next, the bit stream is processed via QPSK modulation, inverse fast Fourier transform, and guard interval insertion to obtain OFDM symbols. Finally, audio signals are generated by passing OFDM signals through AIC23 audio chip and headphone. In the receiver part, signal processing is mainly performed with steps just being opposite to the counterparts in the transmitter. First, the received OFDM signal is retrieved by AIC23 audio chip with microphone. Next, digital signal processor locates the starting signal to retrieve the OFDM symbols after it, removes the guard interval of each OFDM symbol, computes its spectral values via fast Fourier transform, and estimates the data bits by passing them through the QPSK slicer (hard-decision device). Experimental results show that the bit error rate is about ten percent, which is not so good. The reason behind it may be the low-frequency noise from computers and surroundings.


Keyword:Orthogonal frequency division multiplexing, Digital signal processor, Phase modulation, Audio chip, Bit error rate.

摘要 I
Abstract II
目次 III
圖目次 V
表目次 VI
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 1
1.3 論文架構介紹 2
第二章 相關技術回顧 3
2.1 OFDM無線通訊技術 3
2.1.1 通訊系統概述 3
2.1.2 正交分頻多工 3
2.1.3 訊號調變 5
2.1.4快速傅立葉轉換與反快速傅立葉轉換 6
2.2 數位訊號處理器開發平臺 9
2.2.1 數位訊號處理器簡介 9
2.2.2 TI TMS320C6416T DSK硬體架構 11
2.2.3 TI TMS320C6416 DSP 12
2.2.4 TLV320AIC23 音訊編解碼晶片 14
2.2.5 Code Composer Studio 16
第三章 OFDM通訊系統之設計與實作 19
3.1 傳送機模型 19
3.1.1 傳送機製作流程 19
3.1.2 傳送機之實作 20
3.2 接收機模型 25
3.2.1 接收機製作流程 25
3.2.2 接收機之實作 26
第四章 實驗結果與討論 28
第五章 結論與未來展望 35
參考文獻 36
附錄ㄧ 傳送機程式碼 38
附錄二 接收機程式碼 42
附錄三 接收訊號 46

[1] Phil Goldstein, “70% of U.S. consumers have heard of wearables, but might not bite because of price”, Nielsen, 2014.
[2] http://eshare.stust.edu.tw/EshareFile/2009_12/2009_12_cfad5dc1.pdf
[3] Syras Mamun, “MIMO OFDM Technology Tutorial and Systems”, HubPages, 2012.
[4] http://zh.wikipedia.org/wiki/4G
[5] S. B. Weinstein, Paul M. Ebert, “Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform” IEEE Transactions on Communications, 5 Oct 1971.
[6] Richard van Nee, Ramjee Prasad, OFDM wireless multimedia communication, Artech House, Boston, London, 2000.
[7] 溫志宏, 劉宗憲, 邱茂清, 林仁勇, 連振凱, 林進豐, 李國瑞, 正交分頻多重進接技術, 滄海書局, 2007.
[8] Alan v. Oppenheim, Ronald W. Schafer, John R. Buck, Discrete-Time Signal Processing, PEARSON Prentice-Hall, 2007
[9] 蔡偉和, 盧怡仁, 單晶片數位訊號處理平臺之開發速成寶典, 五南圖書, 2012.
[10] 盧怡仁 , 蔡偉和, 單晶片於數位信號處理的應用, 文魁資訊, 2007.
[11] TI, C6416 DSK Help, Texas Instruments Incorporated
[12] TI, “TMS320C6416T Fixed-Point Signal Processor”, Texas Instruments Incorporated, 2009
[13] TI, TLV320AIC23B “Stereo Audio CODEC,8-to 96-kHz, With Integrated Headphone Amplifier”, Texas Instruments Incorporated, 2015
[14] TI, “TI推出新版 Code Composer Studio™ 整合開發環境工具 協助採用 DaVinci™ 與 DSP 技術的客戶縮短產品開發時程”, Texas Instruments Incorporated, 2007
[15] 李宜達, 數位訊號處理之DSP程式設計, 全華圖書, 2011.
[16] M. Stojanovic, J. C. Preisig, “Underwater Acoustic Communication Channels: Propagation Models and Statistical Characterization, ” IEEE Communications Magazine, 84-89, Jan 2009.
[17] Hai Yan, Shengli Zhou, Zhijie Shi, Jun-Hong Cui, Lei Wan, Jie Huang, and Hao Zhou, “DSP Implementation of SISO and MIMO OFDM Acoustic Modems”, The Underwater Sensor Network Lab, University of Connecticut, Storrs, CT, USA, OCEANS 2010 IEEE - Sydney, 24-27, May 2010.

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