擷取時空碼在無線通訊系統中之設計

Design of Punctured Space-Time Codes for Wireless Communications

張雲量(Yun-Liang Chang)

指導教授 ： 王忠炫 ； 鄭立德

中原大學/工學院/電子工程研究所/碩士(2006年)

https://doi.org/10.6840/cycu200700487

摘要

在本篇論文中，我們針對時空碼在非均等錯誤保護的應用提出一個新的擷取時空碼架構，此架構可以達到提升時空編碼系統資料傳輸率之目的，且對於擷取表的選擇更加有彈性。根據時空碼其多根傳送及接收天線的特性，我們分別針對低分集增益及高分集增益的情況，提出相對應的設計法則，來達到擷取時空碼之錯誤更正能力最佳化之目的。為了保證在切換不同碼率時不會造成碼字與碼字間最短距離的損失，新的擷取程序也會依照碼率匹配原則並搭配新型軟式切換模式來設計，進而建立一系列碼率匹配的擷取時空碼。此外，針對碼率匹配擷取時空碼在非均等錯誤保護的應用，我們提出一種新的多工架構來減少多餘傳送信號的浪費。最後，藉由電腦的搜尋，我們提供了一系列最佳擷取時空碼。

關鍵字

擷取技術 ； 時空碼 ； 非均等錯誤保護

並列摘要

In this thesis, we propose a new puncturing scheme for space-time codes which can provide
flexible puncturing performance with increased bandwidth efficiency for the application
to unequal error protection (UEP). With respect to the multiple-input and multiple-output
nature of space-time codes, design criteria are presented to optimize the puncturing performance
for both of the low and high diversity cases. The new puncturing process is also regulated by a rate-compatible criterion together with a new table-switching scheme called soft-switching to create a class of rate-compatible punctured space-time codes to guarantee the smooth transition between different rates. Moreover, a new data-multiplexing scheme is proposed for the rate-compatible punctured space-time codes to optimize the UEP performance without extra overheads. Finally, families of good UEP codes are given by a computer search.

並列關鍵字

Space-time codes ； puncturing ； unequal error protection

參考文獻

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