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

A novel search method to reduce PAPR of an OFDM signal using partial transmit sequences

涂浩中(Hao-Chung Tu)

指導教授 ： 丘建青

淡江大學/工學院/電機工程學系碩士班/碩士(2005年)

https://doi.org/10.6846/TKU.2005.00472

摘要

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。

關鍵字

峰均值功率比 ； 部分傳輸序列法

並列摘要

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.

並列關鍵字

Peak-to-average power ratio ； Partial transmit sequence

參考文獻

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