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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/8344


    Title: 多輸入多輸出正交分頻多工系統於IEEE 802.22無線區域網路通道之效能評估;Performance Evaluation of MIMO-OFDM Systems for IEEE 802.22 WRAN Channels
    Authors: 許信賢;Hsin-Hsien Hsu
    Contributors: 通訊工程研究所
    Keywords: 多輸入多輸出;正交分頻多工;MIMO;OFDM
    Date: 2009-07-10
    Issue Date: 2009-09-22 11:23:27 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 為了要利用多輸入多輸出正交分頻多工系統中的空間多樣性,傳輸端的波束成形及接收端的結合為一種簡易的方法來達到要求。而這種技術可被應用在IEEE 802.22無線區域網路來維持其位元錯誤率的效能。我們將Grassmannian波束成形及天線選擇兩種方法結合來達到較好的位元錯誤率。此外,在考慮到無線區域網路的通道特性下,也結合了子載波分組的方法。最後我們對不同的通道模型做模擬,模擬結果在此被提出來比較並作討論。 Transmit beamforming and receive combining are simple methods for exploiting spatial diversity in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. Such techniques can be applied on the IEEE 802.22 wireless regional area network (WRAN) to maintain bit-error-rate (BER) performance. We combine Grasmannian beamforming and antenna selection algorithm to get superior BER performance. In addition, subcarrier grouping is also added by thinking of the characteristic of the WRANs. Simulation results in different WRAN reference channel models are shown here for comparison.
    Appears in Collections:[通訊工程研究所] 博碩士論文

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