利用部分傳輸序列減少OFDM訊號能量峰值對平均值之比的新搜尋方法

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Title:	利用部分傳輸序列減少OFDM訊號能量峰值對平均值之比的新搜尋方法
Other Titles:	A novel search method to reduce PAPR of an OFDM signal using partial transmit sequences
Authors:	涂浩中;Tu, Hao-chung
Contributors:	淡江大學電機工程學系碩士班丘建青;Chiu, Chien-ching
Keywords:	峰均值功率比;部分傳輸序列法;Peak-to-average power ratio;Partial transmit sequence
Date:	2005
Issue Date:	2010-01-11 07:03:27 (UTC+8)
Abstract:	正交分頻多工(OFDM)的主要缺點之一在於在傳送OFDM訊號過程中會產生高的峰值對均值功率比，以致於訊號經過功率放大器之後會造成非線性失真。部份傳輸序列法(PTS-partial transmit sequence)可以有效改善OFDM訊號的PAPR。但傳統的PTS調變技術必須搜尋相位因子的所有可能組合，其搜尋複雜度會隨著子區間的數量和相位因子的種類呈現指數形式增加。本論文中，我們提出新的PTS技術僅需要些微效能的降低卻能有效減少大量傳統PTS的高計算複雜度的缺點。 One of the main drawbacks of orthogonal frequency division multiplexing (OFDM) is the high peak-to-average power ratio (PAPR) of the transmitted OFDM signal. Partial transmit sequence (PTS) technique can improve the PAPR statistics of an OFDM signal. As ordinary PTS technique requires an exhaustive search over all combinations of allowed phase factors, the search complexity increases exponentially with the number of sub-blocks. In this paper, we propose a novel PTS technique with reduced complexity that achieves significant reduction in search complexity with little performance degradation.
Appears in Collections:	[Graduate Institute & Department of Electrical Engineering] Thesis

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