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    Title: 空間陣列和極化陣列天線對各種隧道之同頻干擾的通道容量研究
    Other Titles: Channel capacity of spatial and polar antenna arrays for various tunnels with co-channel interference
    Authors: 莊智閔;Chuang, Chih-Min
    Contributors: 淡江大學電機工程學系碩士班
    丘建青
    Keywords: 多輸入多輸出全球移動通訊系統;同頻干擾;射線彈跳追蹤法;通道容量;空間陣列;極化陣列;MIMO-GSM;Co-channel interference;ray-tracing approach;channel capacity;Spatial Array and Polar Array
    Date: 2012
    Issue Date: 2013-04-13 12:00:52 (UTC+8)
    Abstract:   本論文主要研究各種隧道內同頻干擾(Co-Channel Interference , CCI)的多輸入多輸出(Multiple-Input Multiple- Output, MIMO)系統之通道容量 (Channel Capacity)。多輸入多輸出可以有效的提高無線通訊系統的通道容量,值得我們將其納入全球移動通訊系統( Global System for Mobile Communications, GSM )中討論,因為多輸出多輸入其通道容量與天線數量呈現線性成長,帶來高傳輸率以及高傳輸品質,藉此能提升系統傳輸率。
      研究使用射線彈跳追蹤法( Ray-Tracing Model )模擬多輸入多輸出的通訊訊號傳輸情形,求得全球移動通訊系統在六種不同隧道下的通道頻率響應,進一步計算相應的通道容量。其六種不同的隧道分別為:1.半圓直線隧道2.矩形直線隧道3.多邊形直線隧道4.半圓彎曲隧道5.矩形彎曲隧道6.多邊形彎曲隧道。
      本文提出此系統在真實環境下會遭遇的兩個問題,並利用模擬途徑計算出所需的結果。在多輸入多輸出的全球移動通訊系統(MIMO-GSM)中,計算出有無同頻干擾之系統通道容量,然而,干擾源包括單一干擾和多根干擾。
      其次,使用空間陣列( Spatial Array, SA )天線和極化陣列( Polar Array, PA )天線部署下,對於此系統通道容量的影響,以往多輸入多輸出大部分都是採用空間陣列天線,然而在某些情況之下,極化陣列天線反而比空間陣列天線來的適合,在多輸入多輸出全球移動通訊系統中傳送端、接收端和多個同頻干擾皆採用兩種天線陣列探討。根據研究結果,在各種隧道內沒有同頻干擾和有同頻干擾的情況下,極化陣列天線優於空間陣列天線的通道容量,研究還發現,周邊彎曲的多邊形隧道在同頻干擾下有最壞的通道容量。
      This paper focuses on the research of channel capacity of Multiple-Input Multiple-Output (MIMO) system with co-channel interference (CCI) in various tunnels. A ray-tracing technique is developed to calculate channel frequency responses in six different geometrical shape tunnels, and the channel frequency response is further used to calculate corresponding channel capacity.
      The channel capacities are calculated based on the realistic environment in this thesis. First, channel capacities of MIMO Global System for Mobile Communications (MIMO-GSM) system without and with CCI are computed. Next, the channel capacities by using spatial and polar antenna arrays deployment are calculated. According to the results, channel capacity of Polar Array (PA) is better than that of Spatial Array (SA) without and with CCI in various tunnels. It is also found that the curvy polygon tunnel has the worst channel capacity with CCI.
    Appears in Collections:[電機工程學系暨研究所] 學位論文

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