摘要
选择性映射(SLM)技术中的相位旋转向量是影响其性能的关键因素.通过对SLM旋转向量的分析,提出了一种旋转向量序列生成算法.该算法引入了部分因子设计,通过查均匀表生成旋转向量矩阵,简单且易于实现.仿真结果表明,与传统SLM算法相比,该算法不增加任何系统复杂度,在子载波数为16,峰均功率比门限值为4.5 dB时获得了0.25,dB的性能改进.对于子载波数较多(如1,024)的环境,该算法依然有效.
The rotation vector is a key factor on selected mapping （SLM） performance. By investigating the rotation vector in SLM, a generation algorithm of rotation vector sequence was proposed. The algorithm introduced fractional factor design. The target rotation vector matrix can be generated by using a uniform table, which made the proposed algorithm simple and easy. Simulation results showed that the system complexity has not any increase compared with traditional algorithm, When the number of sub-carriers was 16 and the selected peak-to-average power ratio （PAPR） threshold was 4.5 dB, PAPR of the algorithm improved about 0.25 dB. The algorithm is still effective when the number of sub-carriers is large （such as 1 024）.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2008年第3期311-314,共4页
Journal of Tianjin University(Science and Technology)
基金
天津市科技攻关培育基金资助项目(043102911)
天津市自然科学基金资助项目(043600611)
关键词
正交频分复用
峰均功率比
选择性映射
部分因子设计
orthogonal frequency division multiplexing （OFDM）
peak-to-average power ratio （PAPR）
selected mapping （SLM）
fractional factorial design
