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研究生:羅雲屏
研究生(外文):Yun-Ping Luo
論文名稱:全率全分集性空頻碼之配置
論文名稱(外文):Allocation of Full-rate Full-diversity Space-Frequency Codes
指導教授:白宏達
指導教授(外文):Hung-Ta Pai
學位類別:碩士
校院名稱:國立臺北大學
系所名稱:通訊工程研究所
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:2007
畢業學年度:95
語文別:中文
論文頁數:51
中文關鍵詞:正交分頻多工空頻碼配置法
外文關鍵詞:OFDMspace-frequency codesallocation
相關次數:
  • 被引用被引用:0
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  • 下載下載:15
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為了提高多天線正交分頻多工系統(OFDM)的效能,有許多不同的空頻碼相繼提出。其中,蘇等人所提出的全率全分集性空頻碼是效能最好的空頻碼之一。為了達到如此的效能,蘇等人將空頻碼以隨機的方式選擇子載波來傳送。若是傳送通道的功率延遲輪廓函數在傳送端為已知,蘇等人更將此空頻碼針對不同的功率延遲輪廓函數,配置到最佳的子載波。本篇論文將進一步針對在傳送端不同的已知訊息,將此一全率全分集性空頻碼進行適當的配置,以得到更好的效能。且更進一步將此空頻碼配置觀念,運用在多使用者的正交分頻多重存取系統(OFDMA)。並提出不同方法來分配子載波給使用者,以獲取整體傳送效能更佳的結果。
Many space-frequency (SF) codes have been developed to improve multiple-antenna OFDM systems. Among them, the full-rate full-diversity SF code proposed by Su et al is one of the best SF codes. They randomly assigned a subcarrier to each codeword to achieve high performance of the system. Moreover, if the power delay profile of the communication channel is available at the transmitter, they allocate each codeword to the optimal subcarrier according to the profile. This work developed proper allocation methods for the full-rate full-diversity code according to variant available information at the transmitter to further improve the system performance. Finally, we apply this allocation concept to multi-user OFDMA systems. Different approaches were derived to allocate a set of subcarriers to each user and then better results are obtained.
第一章 緒論................................................................................................................9
1.1 OFDM之簡介................................................................................................9
1.2 OFDM之原理..............................................................................................10
1.3 OFDM之優缺點..........................................................................................11
1.4 OFDM之應用..............................................................................................11
1.5 論文架構......................................................................................................12
第二章 空頻碼..........................................................................................................13
2.1 文獻綜覽......................................................................................................13
2.2 通道模型(channel model)和空頻碼設計準則(design criteria)..................15
2.3 空頻碼的建構..............................................................................................18
2.4 空頻碼的配置..............................................................................................21
第三章 空頻碼的配置方法.....................................................................................25
3.1 單使用者OFDM系統之空頻碼配置.........................................................25
3.2 多使用者OFDMA系統之空頻碼配置......................................................28
第四章 模擬與討論..................................................................................................34
4.1 單一使用者SFC-OFDM系統之字碼配置模擬與分析.............................35
4.2 多使用者SFC-OFDMA系統之字碼配置模擬與分析..............................41
第五章 結論..............................................................................................................48
參考文獻......................................................................................................................49
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