TWI456955B - 應用於正交分頻多工系統之降低峰均值比之方法 - Google Patents

應用於正交分頻多工系統之降低峰均值比之方法 Download PDF

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TWI456955B
TWI456955B TW101102019A TW101102019A TWI456955B TW I456955 B TWI456955 B TW I456955B TW 101102019 A TW101102019 A TW 101102019A TW 101102019 A TW101102019 A TW 101102019A TW I456955 B TWI456955 B TW I456955B
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candidate
average ratio
space
fast fourier
peak
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TW101102019A
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TW201332318A (zh
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Chih Peng Li
wei wen Hu
Ying Chi Ciou
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Univ Nat Sun Yat Sen
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  1. 一種應用於正交分頻多工系統之降低峰均值比之方法，其包含：提供一發射模組，該發射模組係具有一映像單元、一電性連接該映像單元之時空編碼器、一電性連接該時空編碼器之候選訊號產生器、複數個連接該候選訊號產生器之反快速傅立葉轉換單元及一電性連接該些反快速傅立葉轉換單元之選擇單元，其中該時空編碼器係輸出至少一時空編碼區塊，該候選訊號產生器係接收該時空編碼區塊且對該時空編碼區塊作振幅放大及相位旋轉以輸出複數個候選訊號，該些反快速傅立葉轉換單元係接收該些候選訊號且輸出複數個時域訊號，該選擇單元係具有一第一天線及一第二天線，該選擇單元係可從該些時域訊號中找出一具有最小峰均值比之時域訊號，該第一天線及該第二天線係傳送該具有最小峰均值比之時域訊號；以及提供一接收模組，該接收模組係包含一快速傅立葉轉換單元、一電性連接該快速傅立葉轉換單元之時空解碼器、一電性連接該時空解碼器之侯選訊號偵測器及一電性連接該候選訊號偵測器之解映像單元，該快速傅立葉轉換單元係包含一第三天線，該第三天線係接收一接收訊號，該接收訊號係包含該具有最小峰均值比之時域訊號，該快速傅立葉轉換單元係輸出一頻域訊號，該候選訊號偵測器係偵測該具有最小峰均值比之時域訊號所對應之頻域訊號的振幅變化。
  2. 如申請專利範圍第1項所述之應用於正交分頻多工系統之降低峰均值比之方法，其中該些候選訊號之數量係以下式決定：V2K，其中V為候選訊號之數量，M為特徵週期，K為一個週期中被編成及之數量，及為該時空編碼區塊經由該候選訊號產生器進行振幅放大及相位旋轉後所輸出之候選訊號。
  3. 如申請專利範圍第2項所述之應用於正交分頻多工系統之降低峰均值比之方法，其中該時空編碼區塊經由該候選訊號產生器進行振幅放大及相位旋轉而輸出之候選訊號係表示為： 其中為原始之振幅大小，A為振幅放大倍率，係將矩陣中之對角線元素放大A倍，係將矩陣中之另一對角線元素放大A倍。
  4. 如申請專利範圍第1項所述之應用於正交分頻多工系統之降低峰均值比之方法，其中該候選訊號偵測器係使用最大相似偵測法偵測該具有最小峰均值比之時域訊號所對應之頻域訊號的振幅變化，其偵測方式如下式所示： 其中(．)為候選訊號在接收端所呈現的振幅特徵，Yn 為該接收模組所接收之接收訊號。
  5. 如申請專利範圍第1項所述之應用於正交分頻多工系統之降低峰均值比之方法，其中各該候選訊號需分別藉由兩反快速傅立葉轉換單元轉換成該時域訊號。
  6. 如申請專利範圍第1項所述之應用於正交分頻多工系統之降低峰均值比之方法，其中各該反快速傅立葉單元係具有一循環字首單元，該快速傅立葉轉換單元另包含有一移除循環字首單元。
TW101102019A 2012-01-18 2012-01-18 應用於正交分頻多工系統之降低峰均值比之方法 TWI456955B (zh)

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EP3089417A1 (en) 2015-04-30 2016-11-02 Thomson Licensing Apparatus and method for reducing peak to average power ratio in a signal

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TWI246273B (en) * 2004-06-28 2005-12-21 Ind Tech Res Inst Method and apparatus for high-order PAPR reduction of an OFDM signal
US7206317B2 (en) * 2000-03-28 2007-04-17 At&T Corp. OFDM communication system and method having a reduced peak-to-average power ratio
US7409009B2 (en) * 2003-04-17 2008-08-05 Univeristy Of Southampton Method and apparatus of peak-to-average power ratio reduction
TW201114231A (en) * 2009-10-05 2011-04-16 Univ Nat Sun Yat Sen Transmitter architecture of MIMO-OFDM systems capable of reducing peak-to-average power ratio

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US7206317B2 (en) * 2000-03-28 2007-04-17 At&T Corp. OFDM communication system and method having a reduced peak-to-average power ratio
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US7995602B2 (en) * 2000-03-28 2011-08-09 At&T Intellectual Property Ii, L.P. OFDM communication system and method having a reduced peak-to-average power ratio
US7409009B2 (en) * 2003-04-17 2008-08-05 Univeristy Of Southampton Method and apparatus of peak-to-average power ratio reduction
TW200539601A (en) * 2004-05-20 2005-12-01 Ind Tech Res Inst Method and apparatus for papr reduction of an OFDM signal
TWI246273B (en) * 2004-06-28 2005-12-21 Ind Tech Res Inst Method and apparatus for high-order PAPR reduction of an OFDM signal
TW201114231A (en) * 2009-10-05 2011-04-16 Univ Nat Sun Yat Sen Transmitter architecture of MIMO-OFDM systems capable of reducing peak-to-average power ratio

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