论文:2013,Vol:31,Issue(6):947-951
引用本文:
黄琼丹, 李勇, 付银娟. 多载频类随机相位编码雷达信号设计与特性分析[J]. 西北工业大学
Huang Qiongdan, Li Yong, Fu Yinjuan. A New Multi-Frequency Random Phase Code Radar Signal Designing Method[J]. Northwestern polytechnical university

多载频类随机相位编码雷达信号设计与特性分析
黄琼丹, 李勇, 付银娟
西北工业大学 电子信息学院 机载电子综合信息系统创新实验室, 陕西 西安 710072
摘要:
基于OFDM技术的多频多相编码(multifrequency complementary phase coded,简称MCPC)宽带雷达信号具有控制简单、生成便利和良好的频谱利用率等优点,己成为雷达信号研究领域的重要发展方向和研究热点。用基于改进型Logistic及分段Logistic映射的混沌二相码调制MCPC信号各载频的相位,把混沌信号类随机的性质引入到MCPC信号中,设计出多载频类随机相位编码(multifrequency random-like phase coded,简称MRPC)雷达信号,并对MRPC信号的模糊函数、截获因子、峰均包络功率比(PMEPR)等进行了分析。给出了混沌序列的初值、MRPC信号的载频数及码元个数对PMEPR的影响关系,以便于选择合适的初值、载频数和码元数。仿真结果表明,设计出的新信号既具有MCPC信号的优点,又具有类噪声雷达信号图钉型的模糊函数和良好的抗干扰及低截获(LPI)性能,而且分段Logistic MRPC信号的性能优于改进型Logistic MRPC信号。
关键词:    类随机    改进型Logistic映射    分段Logistic映射    MRPC    模糊函数    PMEPR   
A New Multi-Frequency Random Phase Code Radar Signal Designing Method
Huang Qiongdan, Li Yong, Fu Yinjuan
Department of Electronics Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Abstract:
We propose what we believe to be a new multi-frequency random phase code (MRPC) radar signal de-signing method.Its core consists of:(1) we use the chaotic biphased code based on the improved Logistic mapping and the piecewise Logistic mapping to modulate the phase of the multi-carrier phase code (MCPC) radar signal;(2) we introduce the quasi-random properties of a chaotic signal into the MCPC radar signal and design the MRPC radar signal, whose ambiguity function, interception factor and peak-to-mean envelope power ratio (PMEPR) is then analyzed;(3) to select the initial value of the chaotic sequence of the MRPC radar signal, the number of its frequency carriers and the number of its phase-modulated bits, we present their influence on the PMEPR.The sim-ulation results, given in Figs.2 through 6, and their analysis show preliminarily that:(1) the new MRPC radar sig-nal we thus designed keeps the strong points of the MCPC radar signal, has the thumbtack function of the quasi-noise radar signal and the excellent anti-jamming and LPI performances;(2) the piecewise Logistic MRPC radar signal has a better performance of these kinds than the improved one.
Key words:    autocorrelation    design    mapping    signal processing    radar    ambiguity function    improved Logistic mapping    multi-frequency random phase code (MRPC)    peak-to-mean envelope power ratio (PMEPR)    piecewise Logistic mapping    radar signal   
收稿日期: 2013-03-12     修回日期:
DOI:
基金项目: 航空科学基金(20112053018);航空电子系统射频综合仿真航空科技重点实验室联合资助
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作者简介: 黄琼丹(1979-),女,西北工业大学博士研究生,主要从事雷达信号设计与处理技术的研究。
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