淡江大學機構典藏:Item 987654321/94559
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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/94559


    Title: 不同天線陣列發射角度對通道容量之研究
    Other Titles: Channel capacity for different antenna array with various transmitting angle
    Authors: 吳書逸;Wu, Su-Ei
    Contributors: 淡江大學電機工程學系碩士班
    嚴雨田;Yen, Rainfield Y.
    Keywords: 角度;極化陣列;空間陣列;通道容量;MIMO-LTE;ray-tracing approach;channel capacity;Spatial Array;Polar Array
    Date: 2013
    Issue Date: 2014-01-23 14:46:07 (UTC+8)
    Abstract: 本論文主要研究隧道內有車子及無車子的多輸入多輸出(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，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，求得長期演進技術系統(LTE)在不同的隧道(直線、彎曲)中和三種不同發射天線角度(15度,22度,30度)以及不同接收天線間距的通道頻率響應，進一步計算相應的通道容量,也提出此系統在真實環境下會遭遇的問題利用模擬途徑計算出所需的結果。在多輸入多輸出的長期演進技術系統(MIMO-LTE)中，利用通道的正規化計算出無路徑損耗之系統通道容量。　
    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，在多輸入多輸出長期演進技術系統中傳送端、接收端皆採用兩種天線陣列探討。
    本論文最後結果在直線隧道中無車子的情況下極化陣列天線的通道容量比空間陣列天的通道容量來的好,以傳送天線角度而言以15度較好,有車亦是如此。而對接收天線間距( 、5 )比較以5 公尺通道容量會來的好。而以彎曲隧道而言結果與直線一樣,但是彎曲隧道的通道容量會比直線隧道來的好,因為彎曲隧道有較好的多路徑影響。
    In this thesis focuses on the research of channel capacity of Multiple-Input Multiple-Output (MIMO) system with different transmitting angle in various tunnels with traffic. A ray-tracing technique is developed to calculate channel frequency responses in two different 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. The channel capacities of MIMO Long Term Evolution (MIMO-LTE) system using spatial and polar antenna arrays by different transmitting angles are computed. Numerical results show that, channel capacity of Polar Array (PA) is better than that of Spatial Array (SA)。Moreover，the capacity for transmitting angle at 15degrees is larger compared to the other angles in various tunnels
    Appears in Collections:[Graduate Institute & Department of Electrical Engineering] Thesis

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