PAPR reduction of OFDM signals using partial transmit sequences with low computational complexity

被引:96
作者
Jiang, Tao [1 ]
Xiang, Weidong
Richardson, Paul C.
Guo, Jinhua
Zhu, Guangxi
机构
[1] Univ Michigan, Dept Elect & Comp Engn, Dearborn, MI 48128 USA
[2] Univ Michigan, Dept Comp & Informat Sci, Dearborn, MI 48128 USA
[3] Huazhong Univ Sci & Technol, Dept Elect & Informat, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
orthogonal frequency division multiplexing (OFDM); partial transmit sequences (PTS); peak-to-average power ratio (PAPR); simulated annealing (SA);
D O I
10.1109/TBC.2007.899345
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
Partial transmit sequences (PTS) is one of the attractive techniques to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) system. As conventional PTS technique requires an exhaustive searching over all the combinations of the given phase factors, which results in the computational complexity increases exponentially with the number of the sub-blocks. In this paper, we aim to obtain the desirable PAPR reduction with the low computational complexity. Since the process of searching the optimal phase factors can be categorized as combinatorial optimization with some variables and constraints, we propose a novel scheme, which is based on a nonlinear optimization approach named as simulated annealing (SA), to search the optimal combination of phase factors with low complexity. To validate the analytical results, extensive simulations have been conducted, showing that the proposed schemes can achieve significant reduction in computational complexity while keeping good PAPR reduction.
引用
收藏
页码:719 / 724
页数:6
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