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  • 學位論文

旋轉特徵演算法在時空編碼系統中的全盲目及半盲目等化解碼之研究

Equalization of blind and semi-blind space-time block codes by using transformed eigen decomposition technique

指導教授 : 張豫虎

摘要


在這篇文章中,首先我們在頻率非選擇性衰減通道環境中,利用時空漢克編碼(Hankel space-time block code)結構的特性,在接收端以旋轉特徵分解法來進行盲目的解碼,此編碼具有傳輸率為一(full transmission rate)的特性。模擬結果顯示在不同天線個數下對系統效能的表現。 此外我們提出時空湯普利斯區隔編碼(separated Toeplitz space-time block code) ,在頻率選擇性衰減通道環境下以旋轉特徵分解法所求得的半盲目等化器來直接估計信號,此編碼具有全散度(full diversity)的特性。模擬結果顯示在頻率選擇性衰減通道環境下,比較於其他的方法具有較明顯的系統效能改善。

並列摘要


In this paper, at first we decode the Hankel space-time block code over frequency non-selective fading channel by using transformed-eigen decomposition (TED) method. It shows this code achieves the full transmission rate diversity without full diversity. Simulation results are presented to demonstrate the performance of the proposed method. Another, we proposed the separated Toeplitz block code over frequency selective fading channel by TED method. It shows this code achieves the full diversity with less efficient transmission rate. Simulations show that the performance of the proposed method compared with the well known the methods performs well.

參考文獻


[18] 張豫虎;唐元鍵,“旋轉特徵分解法在多根天線系統之盲目解碼", 先進工程學刊, 第2卷, 第3期, 96年7月
[1] S.M.Alamouti, “A simple transmit diversity technique for wireless communications,” IEEE JSAC, pp.1451-1458, Oct. 1998
[2] V.Tarokh, N.Seshadri,and A.R.Calderbank, ”Space-time codes for high data rate wirelesscommunications: Performance criterion and code construction,” IEEE Trans. Info. Th., pp.744–765, Mar 1998
[3] A. L. Swindlehurst and G. Leus, “Blind and semi-blind equalization for generalized space-time block codes,” IEEE Trans. Signal Process., vol 50, no. 10, pp. 2489-2498, Oct. 2002
[5] N. Sharma, and B. Papadias, “Improved quasi-orthogonal codes through constellation rotation” IEEE Trans on communication, vol. 51, no. 3, pp. 332-335, March 2003

被引用紀錄


紀坤宏(2008)。子空間方法在時空編碼正交分頻多工系統之通道半盲目估測〔碩士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840/CYCU.2008.00350

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