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研究生:林育聖
研究生(外文):Yung-Seng Lin
論文名稱:使用噴泉碼改善峰對均值功率比之方法
論文名稱(外文):A PAPR Reduction Scheme Using Fountain Codes
指導教授:李世凱李世凱引用關係
學位類別:碩士
校院名稱:元智大學
系所名稱:通訊工程學系
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:2011
畢業學年度:99
語文別:中文
論文頁數:40
中文關鍵詞:噴泉碼峰對均值功率比
外文關鍵詞:fountainpapr
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本篇論文主要討論在正交頻分系統中利用湧泉編碼來降低峰值對均值功率比。先前的研究中,一個湧泉編碼的碼字對應一個正交頻分符元的安排已經被證明具有類似選擇映射方法的改善性能;本篇研究中,主要在描述當一個湧泉編碼的碼字對應n個正交頻分符元時,利用湧泉編碼的改善峰值對均值功率比行為;並且描述當m個湧泉編碼的碼字各佔據m/N部分載波數時,此m個湧泉編碼的碼字對應m*n個正交頻分符元時,利用湧泉編碼的改善行為。最後利用電腦模擬的方式驗證利用湧泉編碼的改善行為。

This thesis mainly discusses that using fountain codes to reduce the peak to average power ratio (PAPR) for OFDM systems. In previous research, the arrangement of the mapping from one fountain codeword to one OFDM symbol has been proven with the PAPR reduction performance similar to the well-known method of selective mapping (SLM). In this thesis, we focus on the arrangement of the mapping from one fountain codeword to n OFDM symbols due to the longer length of the codeword and evaluate its PAPR reduction performance. Besides, the arrangement of the mapping from m fountain codewords, each occupies m/N subcarriers, to m*n OFDM symbols is also considered. Computer simulations show the PAPR reduction improvement for these arrangements.

目 錄
書名頁……………………………………………….……………...i
論文口試委員審定書………………………………………….…..ii
授權書........……………………………………………….….iii
中文摘要………………………………………………….….…...iv
英文摘要…………………………………………………………....v
誌謝………………………………….………………………….….vi
目錄………………………….………………………….…………vii
圖目錄………………………….…………………………….…….ix
第一章 序論………………………………………………………1
1.1 研究背景……………………………………1
1.2 研究目標……………………………………1
1.1 論文貢獻………………………………………2
1.4 論文架構…………………………………2

第二章 噴泉編碼…………………………………………………3
2.1 概述…………………………………………….3
2.1.1 刪除道道…………………………………...3
2.1.2 Packet Level and Byte Level 簡介.……5
2.2 Random Linear Fountain Code……………9
2.2.1 Random Linear Fountain Code 簡介…… 9
2.2.2 Random Linear Fountain Code 之不利因素.12

第三章 正交分頻多工技術……………………………………….14
3.1 正交分頻多工技術介紹……………………….14
3.1.1 原理及架構………………………………….14
3.2 峰對均值功率比……………………………….17
3.2.1 峰對均值功率比定義………………………….18
3.2.2 正交分頻多工訊號值振幅統計分佈…………18
3.2.3 峰值對均值功率比之機率統計描述…………21
3.2.4 選擇映射方法…………………………………22

第四章 使用噴泉編碼改善峰對均值功率比之方法…………….24
4.1 Symbol-Wise SLM Scheme....…………………24
4.1.1 噴泉編碼使用一組正交分頻多工訊號……………24
4.1.2 噴泉編碼使用多組正交分頻多工訊號(I)……25
4.1.3 噴泉編碼使用多組正交分頻多工訊號(II)……29
4.1.4 噴泉編碼使用多組正交分頻多工訊號(III)…32
4.2 Multi-Symbol SLM Scheme ………………36

第五章 結論與未來展望…………………………………………38
參考文獻……………………………………………………39


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[15] IP Datacast over DVB-H: Content Delivery Protocols ETSI DVB TM-CBMSI 167,draft Technical Specification, http://www.dvb.org ,2005.


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