臺灣博碩士論文加值系統

論文中利用多載波分碼多重進接系統(MC-CDMA)傳送器架構可表示為逆傅利葉轉換(IDFT)及接收器架構前端為傅利葉轉換(DFT)相互對應的特性，以頻率分析的技巧應用於等化器設計上，此法顯著地簡化了時域信號處理的過程。
為避免訓練序列(Training Sequence)對系統資源的浪費，等化器是此篇論文的設計目標，藉由行動通訊過程中基地台與手機交遞(handover)的訊號，來提供等化器調適的初始值。因盲蔽等化器以定模數法則(Constant Modulus Algorithm: CMA)並不保證使等化器收斂到能還原信號的權重，本文中以數值推導指出此缺點，並提出設定式定模數法則為解決方案，以極點、鞍點推導，多重設定(Multiple-constrained)保證等化器正確收斂。
模擬數據說明在多載波分碼多重進接系統(MC-CDMA)中，由於每次調適的輸入信號不再只是時間延遲的連續信號，使LMS有較RLS為佳的輸出效能。最後並以模擬印證較多的次載波能於還原信號時提供幫助。

1.摘 要
2.第一章 緒論
3.第二章 正交分頻多工調變(OFDM)與多載波分碼多重進接系統(MC-CDMA)
4.第三章 系統模型
5.第四章 調適性盲蔽等化器
6.第五章 設定式定模數法則 (Constrained Constant Modulus Approach)
7.第六章 模擬結果與討論
8.第七章 結論
9.參考文獻

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