研究生: |
張谷毓 Ku-Yu Chang |
---|---|
論文名稱: |
智慧型天線技術於藍芽干擾環境下之無線區域網路語音服務應用 Applying Smart Antenna Technologies to VoWLAN with Bluetooth Interference |
指導教授: |
劉馨勤
Hsin-Chin Liu |
口試委員: |
曾德峰
Der-Feng Tseng 張立中 Li-Chung Chang 黃紹華 none 黃文傑 none |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2006 |
畢業學年度: | 94 |
語文別: | 英文 |
論文頁數: | 49 |
中文關鍵詞: | 無線區域網路 IEEE 802.11b 、智慧型天線 、藍芽 、網際網路語音 、同頻道干擾 |
外文關鍵詞: | WLAN IEEE 802.11b, Smart Antenna, Bluetooth, VoIP, co-channel interference |
相關次數: | 點閱:248 下載:1 |
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近年來,隨著無線網路的興起與普及,應用愈形廣泛。本篇論文主要闡述當語音透過無線區域網路傳輸時,受到同頻道干擾所造成服務品質降低,如封包遺失率提高、平均時基誤差增加等。
本研究使用IEEE 802.11b協定來傳輸語音,其操作頻帶為 2.4 GHz,但在此頻帶上亦有藍芽等其他系統而造成同頻道干擾問題。在此我們使用智慧型天線技術於同頻道干擾環境下使通話品質變好。
透過實驗及電腦模擬,可以得知使用智慧型天線技術於 IEEE 802.11b 系統後,可消除同頻道干擾,因此也可以使通話品質得到改善。
With the popularity of wireless network in recent years, applications are more and more extensively. This thesis elaborates the effect of service quality decrease such as packet loss rate and mean jitter increase caused by co-channel interference at voice transmission over wireless local area network.
Our research uses the IEEE 802.11b protocol for voice transmission, which operation frequency band is 2.4 GHz. However, other systems such as Bluetooth also utilize this frequency band and therefore cause the co-channel interference problem. We apply smart antenna technologies on the co-channel interference environment to make the voice quality better.
The experiment and computer simulation results show that it can eliminate the co-channel interference very well and therefore the performance of voice quality is improved by applying smart antenna technologies on IEEE 802.11b system.
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