A new PTS OFDM scheme with low complexity for PAPR reduction

被引：126
作者：
Lim, DW [1 ]
Heo, SJ
No, JS
Chung, HB
机构：
[1] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151744, South Korea
[2] Hongik Univ, Sch Elect & Elect Engn, Seoul 121791, South Korea
来源：
IEEE TRANSACTIONS ON BROADCASTING | 2006年 / 52卷 / 01期
关键词：
orthogonal frequency division multiplexing (OFDM); partial transmit sequence (PTS); peak to average power ratio (PAPR);
D O I：
10.1109/TBC.2005.861605
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we introduce a new partial transmit sequence (PTS) orthogonal frequency division multiplexing (OFDM) scheme with low computational complexity. In the proposed scheme, 2(n)-point inverse fast Fourier transform (IFFT) is divided into two parts. An input symbol sequence is partially transformed using the first 1 stages of IFFT into an intermediate signal sequence and the intermediate signal sequence is partitioned into a number of intermediate signal subsequences. Then, the remaining n-l stages of IFFT are applied to each of the intermediate signal subsequences and the resulting signal subsequences are summed after being multiplied by each member of a set of W rotating vectors to yield W distinct OFDM signal sequences. The one with the lowest peak to average power ratio (PAPR) among these OFDM signal sequences is selected for transmission. The new PTS OFDM scheme reduces the computational complexity while it shows almost the same performance of PAPR reduction as that of the conventional PTS OFDM scheme.
引用
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页码：77 / 82
页数：6
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