非均等錯誤保護時空碼之研究

Space-Time codes for Uneqaul Error Protection

邱顯鈞(Shian-Jiun Chiou)

指導教授 ： 王忠炫

中原大學/工學院/電子工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400775

摘要

隨著科技與社會的進步，人們對於無線多媒體服務的需求急遽增加，
然而無線傳輸通道與身俱來的非理想特性與接收機本身的熱雜訊干擾，
往往造成接收端的訊號嚴重失真。
目前最熱門的時空碼擁有抑制通道非理想特性的強大能力兼俱高資料傳輸率，
而非均等錯誤保護技術能夠依據傳輸資料重要性的不同，提供各自所需的保護能力。
在本論文中結合非均等錯誤保護與時空編碼技術，
擷取二者之優點以設計出適合於無線多媒體傳輸之通道編碼系統。
我們主要探討非均等錯誤保護時空碼本身所具有的非均等錯誤保護能力，
並且提出設計最佳非均等錯誤保護時空碼所需依循的準則。
此外，也對非均等錯誤保護與時空碼代數結構做詳盡的探討，
最後運用所得結果進行高效能非均等錯誤保護時空碼之電腦搜尋。

關鍵字

時空編碼技術 ； 無線多媒體服務 ； 非均等錯誤保護

並列摘要

With the progress of science and society, the demands for wireless multimedia services
increase rapidly. However, the signals transmitted over wireless channels usually
experience serious distortion due to the corruption of multipath fading and thermal noise.
Space-time codes, which combine both of the spatial and temporal diversities,
have been shown to provide excellent performance against the fading effect.
Coding techniques for unequal error protection (UEP),
which can provide different protecting efforts with respect to different protection requirements,
can make the best use of channel bandwidth in many practical applications.
In this thesis, space-time codes are combined with UEP for channel coding of high-rate wireless multimedia communications.
We study the UEP capabilities of space-time codes from an algebraic viewpoint.
The performance analysis together with some design criteria of the UEP space-time codes are presented.
We also propose several schemes for constructing the space-time codes of powerful UEP capabilities,
based on which tables of good UEP codes with various rates and memories are given.

並列關鍵字

unequal error protection ； Wireless multimedia communications

參考文獻

[1]V. Tarokh, N. Seshadri, and A. R. Calderbank,

``Space-time codes for high data rate wireless communication: performance criterion and code construction,"

[2]J. G. Proakis,

Digital Communication.

4rd ed. New York: McGraw-Hill, 2001.