| 一种基于Bernoulli混沌的四相编码OFDM雷达信号设计方法 |
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| 引用本文： | 霍凯,赵晶晶. 一种基于Bernoulli混沌的四相编码OFDM雷达信号设计方法[J]. 雷达学报, 2016, 5(4): 361-372. DOI: 10.12000/JR16050 |
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| 作者姓名： | 霍凯 赵晶晶 |
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| 作者单位： | (国防科学技术大学电子科学与工程学院 长沙 410073) |
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| 基金项目： | 自然科学基金青年科学基金(61501481);中国航天科技集团公司航天科技创新基金~~ |
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| 摘 要： | 相位编码正交频分复用(OFDM)雷达具有许多优良的性能，近年来受到雷达界的广泛关注。但在实际应用中，相位编码OFDM雷达信号存在优良编码数量不多、长度受限、峰均比过高等问题。该文针对这些问题，提出了一种基于Bernoulli混沌的四相编码OFDM雷达信号设计方法，可以构建任意数量和长度的编码，具有更大的设计自由度，并且通过初相加权，得到包络峰均比小于2的混沌四相编码OFDM信号，该信号在高分辨、多普勒等方面具有较多优良特性。
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| 关 键 词： | 正交频分复用雷达 相位编码 混沌 包络峰均比 模糊函数 |
| 收稿时间： | 2016-03-02 |
A Design Method of Four-phase-coded OFDM Radar Signal Based on Bernoulli Chaos |
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| Huo Kai;Zhao Jingjing. A Design Method of Four-phase-coded OFDM Radar Signal Based on Bernoulli Chaos[J]. Journal of Radars, 2016, 5(4): 361-372. DOI: 10.12000/JR16050 |
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| Authors: | Huo Kai Zhao Jingjing |
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| Affiliation: | (College of Electronic Science and Engineering, NUDT, Changsha 410073, China) |
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| Abstract: | Orthogonal Frequency-Division Multiplexing (OFDM) radar is receiving increasing attention in the radar field in recent years and is showing excellent performance. However, for practical applications, there are several problems with phase-coded OFDM radar, such as the existence of few good codes, limited length capability, and a high Peak-to-Mean-Envelope Power Ratio (PMEPR). To address those problems, in this paper, we propose a design method for a four-phase-coded OFDM radar signal based on Bernoulli chaos, which can construct codes of arbitrary amounts and lengths and demonstrate more agility and flexibility. By adopting original phase weighting, this method can obtain a chaotic four-phase-coded OFDM signal with a PMEPR less than two. This signal has excellent performance with respect to high resolution and Doppler radar application. |
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