降低OFDM系统PAPR的改进SLM算法
Improved SLM algorithm for PAPR reduction in OFDM system
- 通信学报 2018年39卷第4期 页码：152-158
- 作者机构：
1. 东北大学计算机科学与工程学院，辽宁 沈阳 110169
2. 东北大学信息科学与工程学院，辽宁 沈阳 110004
- 作者简介：
[ "季策（1969-），女，辽宁沈阳人，博士，东北大学副教授，主要研究方向为盲信号处理和OFDM关键技术。" ]
[ "祝雯靖（1994-），女，辽宁沈阳人，东北大学硕士生，主要研究方向为OFDM关键技术。" ]
[ "魏颖（1968-），女，辽宁本溪人，博士，东北大学教授，主要研究方向为信号处理与分析、计算机视觉等。" ]
[ "贾佃霞（1991-），女，山东临汾人，东北大学硕士生，主要研究方向为OFDM关键技术。" ]
- 基金信息：国家自然科学基金资助项目(61673093);国家自然科学基金资助项目(61370152);沈阳市科技计划基金资助项目(F16-205-1-01)
DOI：10.11959/j.issn.1000-436x.2018059
中图分类号： TN919.3-
网络首发：2018-04，
纸质出版：2018-04-25
- 稿件说明：
移动端阅览
季策, 祝雯靖, 魏颖, 等. 降低OFDM系统PAPR的改进SLM算法[J]. 通信学报, 2018,39(4):152-158.
Ce JI, Wenjing ZHU, Ying WEI, et al. Improved SLM algorithm for PAPR reduction in OFDM system[J]. Journal on Communications, 2018, 39(4): 152-158.
季策, 祝雯靖, 魏颖, 等. 降低OFDM系统PAPR的改进SLM算法[J]. 通信学报, 2018,39(4):152-158. DOI： 10.11959/j.issn.1000-436x.2018059.
Ce JI, Wenjing ZHU, Ying WEI, et al. Improved SLM algorithm for PAPR reduction in OFDM system[J]. Journal on Communications, 2018, 39(4): 152-158. DOI： 10.11959/j.issn.1000-436x.2018059.
摘要
为了降低正交频分复用系统中 SLM 算法的峰均功率比，减少边带信息传输，提高频谱利用率，首先提出基于转移矩阵和混沌序列的TL-SLM算法。TL-SLM算法有效减少了边带信息的传输，但PA P R的降低幅度有限。因此，进一步提出基于旋转向量的改进TL-SLM算法，即TR-SLM算法，该算法通过旋转向量的引入，产生更多的时域备选信号，达到进一步降低PA P R的目的。性能分析表明，虽然TL-SLM算法和TR-SLM算法少量增加了系统的复杂度，但PAPR性能得到了有效改善，而且较大幅度地减少了边带信息的传输。
Abstract
In order to reduce the peak to average power ratio (PAPR) of the conventional selective mapping (SLM) algorithm
decrease the transmission of side-band information
and improve the spectral efficiency in the orthogonal frequency division multiplexing (OFDM) system
the TL-SLM algorithm based on the conversion matrix and the chaotic sequence was proposed firstly.Although the TL-SLM algorithm could effectively decrease the transmission of side-band information
the reduction of PA P R was limited.To solve this problem
an improved TL-SLM algorithm based on the rotation vector was proposed
which was the TR-SLM algorithm.TR-SLM algorithm introduced the rotation vector to generate more time-domain alternative signals to further reducing the PA P R.The performance analysis shows that although the TL-SLM algorithm and the TR-SLM algorithm increase the complexity a little
the PA P R performance is effectively improved and the transmission of side-band information is greatly reduced.
关键词
Keywords
references
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