一般的蜂巢式通訊系統(Cellular Communication System)中，存在蜂巢式區域間干擾(Inter-Cell Interference, ICI)的問題。當多重路徑衰減(Multipath Fading)和遮蔽效應(Shadowing Effect)同時存在的環境，可以稱為複合衰減(Composite Fading)。在本論文裡，探討在複合衰減通道的環境下，分散式天線系統(Distributed Antenna Systems, DAS)如何選擇一組適當的遠端天線(Remote Antennas, RAs)來提供空間多樣性(Spatial Diversity)，藉此來提升訊號的品質和傳輸的速率。我們利用近似的方法，推得出近似的訊號干擾比(Signal to Interference Ratio, SIR)統計分布和中斷機率(Outage Probability)。藉由我們推得的中斷機率當作一個準則，來判別行動式用戶(Mobile Station, MS)在不同的位置該由那一組RAs來傳送，是否RAs彼此之間要互相合作傳送給目的端或者由單一根RA來傳送即可。由電腦模擬結果可得知，我們推得出來近似的SIR統計分布與中斷機率和實際的模擬值非常接近，可知我們推得出來數學式子的準確性。

A distributed antenna system (DAS) with inter-cell interference (ICI) in composite fading channel, where multipath and shadowing effect simultaneously exist, is considered in this thesis. How to properly choose a set of remote antennas (RAs) to provide spatial diversity as well as enhance the signal quality and transmission rate is the core concept in this work. Some approximation schemes are utilized to derive the closed form of statistical distributions for both the signal to interference ratio (SIR) and outage probability. According to these approximations and the position of mobile station, we can partition the service area into several different cooperative regions. Simulation results show that the derived approximations are very similar to the experiment results.

論文審定書 ....................................................................................................................... i
誌謝 ................................................................................................................................. ii
中文摘要 ......................................................................................................................... iii
Abstract ............................................................................................................................ iv
第一章 導論 .................................................................................................................... 1
1.1 研究動機 ............................................................................................................... 2
1.2 論文架構 ............................................................................................................... 2
第二章 系統模型 ............................................................................................................ 3
2.1 分散式天線系統 ................................................................................................... 3
第三章 合作式傳送統計分布 ........................................................................................ 6
3.1 獨立且相同分布 ................................................................................................... 6
3.2 獨立但不同分布 ................................................................................................. 11
3.3 複合衰減通道 ..................................................................................................... 23
第四章 模擬結果 .......................................................................................................... 35
4.1 小尺度傳播模型 ................................................................................................. 35
4.2 複合衰減通道 ..................................................................................................... 35
第五章 結論 .................................................................................................................. 41
參考文獻 ........................................................................................................................ 42
中英對照表 .................................................................................................................... 47
縮寫對照表 .................................................................................................................... 52

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