| 引用本文: | 杨进,邱兆坤,黎湘,等.混沌随机频率步进信号分析与处理.[J].国防科技大学学报,2012,34(6):163-169.[点击复制] |
| YANG Jin,QIU Zhaokun,LI Xiang,et al.Analysis and processing of the chaotic-based random stepped frequency signal[J].Journal of National University of Defense Technology,2012,34(6):163-169[点击复制] |
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| 混沌随机频率步进信号分析与处理 |
| 杨进, 邱兆坤, 黎湘, 庄钊文 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 混沌具有类随机性、对初值敏感、易于产生和控制,频率步进信号易于工程实现和处理,结合二者的优势，提出一种基于混沌序列的随机频率步进雷达信号。介绍了信号产生模型，从理论上推导、分析了该信号的模糊函数和互相关函数性能，给出了信号直接相关和先排序存储、后匹配滤波两种回波处理方法。应用四种典型混沌进行数值仿真，并和已有的线性频率步进信号、高斯和均匀随机频率步进信号进行对比分析。结果表明，混沌随机频率步进信号具有较优良的性能，是一种有潜力的雷达信号。 |
| 关键词: 混沌雷达 频率步进 雷达信号设计 随机步进 |
| DOI： |
| 投稿日期：2012-03-26 |
| 基金项目:国家自然科学基金资助项目（60872143，61072117，61171133）;湖南省自然科学杰出青年基金项目（11zz1010) |
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| Analysis and processing of the chaotic-based random stepped frequency signal |
| YANG Jin, QIU Zhaokun, LI Xiang, ZHUANG Zhaowen |
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(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| A new radar signal, the chaotic based random stepped frequency signal, is proposed because of characteristics of chaos such as pseudorandom behavior, sensitivity for initial condition, accessibility for generation and control, and easy realization and processing for the stepped frequency signal. A signal model was introduced, then the ambiguity function and the cross correlation function were analyzed theoretically in detail, and two different echo signal processing methods were proposed finally. Numerical simulations based on four typical chaotic maps and two random series show that the designed signal is effective, and promising for radar application. |
| Keywords: chaotic radar stepped frequency radar signal design random stepped |
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