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

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研究生：	許信賢 Hsin-Hsien Hsu
論文名稱：	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
指導教授：	陳永芳 Yung-Fang Chen
口試委員:
學位類別：	碩士 Master
系所名稱：	資訊電機學院 - 通訊工程學系 Department of Communication Engineering
畢業學年度：	97
語文別：	英文
論文頁數：	60
中文關鍵詞：	多輸入多輸出、正交分頻多工
外文關鍵詞：	MIMO, OFDM
相關次數：	點閱：6 下載：0
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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.

論文摘要	I
Abstract	II
致謝	III
Contents	IV
List of Figures	VI
List of Tables	IX
Chapter 1 Introduction	1
Chapter 2 System Model	5
2.1 Introduction to OFDM 	5
2.1.1 OFDM basic concepts	5
2.1.2 Guard interval and cyclic extension	8
2.1.3 Windowing	10
2.1.4 OFDM transceiver Architecture	11
2.2 MIMO-OFDM with transmit beamforming and receive combining	13
2.2.1 MIMO system	13
2.2.2 MIMO-OFDM systems	14
2.2.3 Transmit beamforming and receive combination	15
2.3 IEEE 802.22 WRAN reference channel	17
Chapter 3 MIMO-OFDM Transmission Scheme for IEEE 802.22 WRAN 	20
3.1 Grassmannian Beamforming	20
3.2 Antenna selection	21
3.3 Sub-carrier Grouping	25
3.4 RLS-based Adaptive Prediction	29
Chapter 4 Simulation Result	33
Chapter 5 Conclusion	49
Reference	50

                                

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