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研究生:邱品棋
論文名稱:投影於凸面集合法在無線通訊之應用
論文名稱(外文):Applications of the POCS method in wireless communication
指導教授:方文賢
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電子工程系
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:2002
畢業學年度:90
語文別:中文
中文關鍵詞:調適束波器強健式投影於凸面集合法空間與時間信號處理
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調適束波器在各式的信號處理問題中有著各式應用,它具有動態調整波束以增強期望訊號強度與消除干擾信號的能力。在本篇論文中,我們提出一種投影於凸面集合法的簡單且有效率的束波器設計方式。
我們提出的方法首先建立束波器權重向量的凸面限制集合,進而審慎地選擇適當的權重向量以滿足期望的特性與規則。基於最小變異法則與在期望方向給予固定增益以及考慮強健式效果,提出的三個限制集合包括了增益限制集合、最小變異限制集合與範數限制集合,這些限制集合都將證明為凸面集合。考慮在干擾信號方位角已知的情況下,我們利用這項新增的訊息而建構出另一限制集合。這些處理程序都是以遞迴式投影到各個凸面集合中。在投影於凸面集合法的原理下,權重向量將會收斂到這些限制集合的交點,該交點即為吾人所需。
我們亦結合了在直序列分碼多工系統下多使用者偵測與所提出的調適束波器架構,產生了空間與時間的處理方式。對於新接收的資料,權重向量遞迴地投影在空間與時間的凸面集合內。
與先前的作法比較,模擬結果顯示我們的方法取得了效能與收斂性的平衡。結合多使用者偵測與束波器的方式,在效能上勝過了單獨使用多使用者偵測的架構,當更多使用者的方位角已知時,效能則獲得更進一步的改善。

chapter1{INTRODUCTION}
Chapter2{REVIEW OF PROJECTION ONTO CONVEX SET METHOD}
Chapter3{ROBUST ADAPTIVE BEAMFORMING VIA THE POCS METHOD}
Chapter4{JOINT BEAMFORMING AND MUD VIA THE POCS METHOD}
Chapter5{CONCLUSIONS}

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