在微波存取全球互通系統使用帶外功率降低法在通道衰落效應下之效能研究

Performance Studies of Out-of-Band Power Reduction of WiMAX System over Fading Channel

張士哲(Shih-che Chang)

指導教授 ： 許超雲

大同大學/電機資訊學院/通訊工程研究所/碩士(2010年)

摘要

行動通訊和寬頻服務是現代化生活中越來越重要的一個生活需求，而另外一個在技術上的重要議題就是關於頻譜的有效使用率。正交分頻多工技術正是因應以上目的而產生的技術，並且WiMAX也是建構在此一技術下的無線通信系統。但是有一個不利的情形存在於正交分頻多工這這樣的技術中，就是有著嚴重的帶外功率散逸問題。本研究所的團隊在過去致力於此方面的研究，並且也都有相當不錯的成果。
在本篇論文，我們鑑定出這些不同的抑制帶外功率散逸法在通過瑞利衰落和可加性白高斯雜訊後的表現。第一，我們先將信號在發送端作抑制帶外功率的處理流程，第二，再將這樣的信號，通過瑞利衰落和可加性白高斯雜訊的模擬通道，最後，於接收端評估各種帶外功率降低法的效能及抗雜訊能力。

關鍵字

瑞利衰落 ； 正交分頻多工 ； 微波存取全球互通 ； 帶外功率降低

並列摘要

Mobile communication and broadband service is becoming more important today. Another important topic in technology is the efficient utilization of spectrum. OFDM is a popular solution for those purposes, and WiMAX is a system based on OFDM. The situation is that OFDM system suffers from an intrinsic high out-of-band power emission. There are several research teams that dedicated their efforts to the reduction of out-of-band power emission in recent years and getting some fruitful results.
In this thesis, we try to identify the performance of these approaches of out-of-band power emission over the Rayleigh fading with AWGN. Firstly, we use the signal under the reduction process of out-of-band power emission. Secondly, we pass the signal through a simulated channel of Rayleigh fading with AWGN. And lastly, we could understand the performances on receiving side.

並列關鍵字

OFDM ； WiMAX ； Out-of-Band Power Reduction ； Rayleigh Fading

參考文獻

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