Title

在高速鐵路環境下可適性波束成型技術之研究

Translated Titles

A study on Adaptive Beamforming Techniques in High-Speed Train Environment

DOI

10.6342/NTU.2005.00163

Authors

何錦富

Key Words

高速鐵路 ; 可適性波束成型 ; High-Speed Train ; Adaptive Beamforming

PublicationName

臺灣大學電信工程學研究所學位論文

Volume or Term/Year and Month of Publication

2005年

Academic Degree Category

碩士

Advisor

張進福

Content Language

繁體中文

Chinese Abstract

高速鐵路系統近年來由於高速度、高乘載以及安全性高等因素,未來可期望成為主要的大眾運輸交通工具。而可適性波束成型(Adaptive beamforming)技術有擴充系統容量及消除干擾信號等優點,勢必會成為通訊系統中重要的一環,因此探討可適性波束成型系統在高速鐵路環境下所面臨到的問題以及解決方法是一個非常重要的課題。首先假設高速鐵路系統已知信號來源方向(DOA),利用此已知信號方向我們先架構運用QR-RLS演算法的可適性波束成型器,套用在高速鐵路環境中由模擬結果可知波束在干擾信號方向會有零陷點的偏移以及凹陷程度不夠等問題,因此我們建構了時域寬頻可適性波束成型器以及頻域寬頻可適性波束成型器來補償上述波束方面的問題。最後為了高速鐵路通訊系統的強健性及完備性,我們做了信號方位估測,估測信號來的方向以形成波束消除干擾信號,運用MUSIC演算法做高解析度的信號估測以及ESPRIT演算法來降低估測的計算複雜度以及記憶體儲存空間,同時運用Forward / Backward Spatial Smoothing以及Unitary Transform等方法來降低信號間的同調(Coherent)效應,以增加信號方位估測的準確度以及估測振幅響應。

Topic Category 電機資訊學院 > 電信工程學研究所
工程學 > 電機工程
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Times Cited
  1. 吳偉立(2006)。時空碼應用於多輸入多輸出超高速移動通道的可行性研究。臺灣大學電信工程學研究所學位論文。2006。1-87。