降低OFDM雷达PAPR的SLM改进算法研究

doi:10.3969/j.issn.1009-086x.2018.04.024

现代防御技术 ›› 2018, Vol. 46 ›› Issue (4): 163-168.DOI: 10.3969/j.issn.1009-086x.2018.04.024

• 仿真技术 • 上一篇

降低OFDM雷达PAPR的SLM改进算法研究

王嵩乔¹, 夏海宝¹, 许蕴山¹, 李德芳²

1.空军工程大学航空航天工程学院,陕西西安 710038;
2.空军预警学院,湖北武汉 430019

收稿日期:2017-08-29 修回日期:2017-11-19 出版日期:2018-08-30 发布日期:2020-11-25
作者简介:王嵩乔(1993-),男,辽宁营口人。硕士生,研究方向雷达信号与信息处理。通信地址:710038 陕西省西安市灞桥区霸陵路1号 E-mail:595182404@qq.com
基金资助:
航空科学基金(2014ZC07002;20155596024)

Improved SLM Algorithm for Reducing PAPR of OFDM Radar

WANG Song-qiao¹, XIA Hai-bao¹, XU Yun-shan¹, LI De-fang²

1. AFEU,Aeronautics and Astronautics Engineering College,Shaanxi Xi'an 710038,China;
2. Air Force Early Warning Academy,Hubei Wuhan 430019,China

Received:2017-08-29 Revised:2017-11-19 Online:2018-08-30 Published:2020-11-25

摘要/Abstract

摘要： 正交频分复用(orthogonal frequency division multiplexing,OFDM)雷达信号具有良好的分辨力和较高的频谱利用率,其中基于混沌二相编码调制的OFDM雷达信号由于具有结构灵活、更优的脉压性能和较强抗干扰能力等优点受到广泛青睐,但是在系统中存在的高峰均比问题使得OFDM雷达在实际应用受到限制。针对各载波不同混沌二相编码序列调制的OFDM雷达信号,提出一种基于混沌粒子群的选择性映射(selective mapping,SLM)算法来降低OFDM雷达信号中的高峰均比问题。实验结果表明:相比于传统SLM算法和基本粒子群SLM算法,基于混沌粒子群的SLM算法在降低OFDM雷达信号的峰均比方面具有更好的效果。

关键词: OFDM, 编码, 峰均比, 混沌序列, 选择性映射, 粒子群算法

Abstract: Orthogonal frequency division multiplexing (OFDM) radar signal has good resolution and high spectral efficiency; and OFDM radar signal based on chaotic binary-phase coded modulation is widely favored due to its flexible structure, better pulse compression performance and strong anti-jamming capability. However, the high peak-to-average power ratio in the system makes the OFDM radar limited in practice. A selective mapping (SLM) algorithm based on chaotic particle swarm optimization (CPSO) is proposed to reduce the peak-to-average power ratio for the OFDM radar signals modulated by different chaotic binary-phase coding sequences. The experimental results show that the SLM algorithm based on CPSO has better effect in reducing the peak-to-average power ratio of OFDM radar signal than traditional SLM algorithm and basic particle swarm optimization SLM algorithm.

Key words: orthogonal frequency division multiplexing(OFDM), coded, peak-to-average power ratio, chaotic sequence, selective mapping, particle swarm optimization

中图分类号:

王嵩乔, 夏海宝, 许蕴山, 李德芳. 降低OFDM雷达PAPR的SLM改进算法研究[J]. 现代防御技术, 2018, 46(4): 163-168.

WANG Song-qiao, XIA Hai-bao, XU Yun-shan, LI De-fang. Improved SLM Algorithm for Reducing PAPR of OFDM Radar[J]. Modern Defense Technology, 2018, 46(4): 163-168.

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降低OFDM雷达PAPR的SLM改进算法研究

Improved SLM Algorithm for Reducing PAPR of OFDM Radar

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