多輸入多輸出系統應用於802.11b

MIMO system applied for 802.11b

莊國樑(Kuo-Liang Chuang)

指導教授 ： 劉大勇

中原大學/工學院/電子工程研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700068

摘要

在1998年時IEEE提出802.11b無線傳輸技術的標準，它延伸了802.11的技術，使用了互補碼調變將傳輸速率提升到11M bps，由於它的架構簡單所以至今仍是一個被廣泛使用在室內環境的無線傳輸標準。在無線傳輸中都會面臨到通道衰落的困擾，結合多輸出多輸入系統配合上時空編碼正是解決此問題的方法之ㄧ，所以我們希望透過結合多根天線的系統來改善802.11b在衰落通道下的效能，然而利用多根天線傳輸系統勢必會增加系統的複雜度，就系統的實現來說這是我們所不樂見的，所以我們提出了一種新的互補碼解碼的架構，使其降低了足夠多的複雜度來彌補多根天線系統帶來的負擔。

關鍵字

802.11b ； 互補碼 ； 多輸入多輸出系統

並列摘要

In July 1998 the IEEE 802.11 working group proposed the IEEE 802.11b standards, which extended the IEEE 802.11.The IEEE 802.11b adapted complementary code keying (CCK) for the high rate physical layer to deliver data at highest speed 11Mbps. Because having the uncomplicated structure, it still widely be used in indoor environment. In wireless communication, we are assailed with fading effects. Using the multiple input multiple output (MIMO) system is one method to avoid the fading effects. When using IEEE 802.11b under fading channel ,we want to use this technique to improve the performance. But MIMO system will make the system having higher complicacy, it’s not the benefit for system implementation. Because of that, we propose a new ideal about the CCK decoding which can reduce enough complicacy to recover the cost.

並列關鍵字

MIMO ； CCK(complementary code keying) ； 802.11b

參考文獻

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