| 摘要: |
| 本文研究了ZC序列的自相关特性、循环相关性、傅里叶不变性、低峰均比特性，通过研究ZC序列的傅里叶不变性揭示了ZC序列与其调制的OFDM信号之间的关系。文章提出了匹配特性检测算法和多普勒容限特性检测算法，用于直观地研究信号波形的匹配特性和多普勒容限特性。仿真结果表明，ZC序列码调制的OFDM信号波形具有和线性调频信号波形相同的“斜刀刃型”模糊函数，其与线性调频信号波形在匹配特性和多普勒容限特性方面也呈现相同的特性，是一种性能良好的雷达探测信号波形。 |
| 关键词: ZC序列 OFDM信号 探测特性 模糊函数 |
| DOI：DOI:10.3969/j.issn.1672-2337.2019.06.007 |
| 分类号:TN957 |
| 基金项目: |
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| Study on Detection Characteristics of OFDM Signal Waveform Modulated by ZC Sequence Code |
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ZENG Ruiqi，LUO Shengyang，LIU Fangzheng
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Institute of Electronic Countermeasure，National University of Defense Technology，Hefei 230037，China
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| Abstract: |
| In this paper，the autocorrelation，cyclic correlation，Fourier invariance and low peak to average ratio of ZC sequence are studied. The relationship between ZC sequence and ZC sequence modulated OFDM signal is revealed by studying the Fourier invariance of ZC sequence. A matching feature detection algorithm and a Doppler tolerance feature detection algorithm are proposed to study the matching and Doppler tolerance characteristics of signal waveforms intuitively. The simulation results show that the waveform of ZC sequence code modulated OFDM signal has the same “oblique knife edge” ambiguity function as the waveform of LFM signal，and it has the same matching and Doppler tolerance characteristics as the waveform of LFM signal. The simulation results show that the OFDM signal waveform modulated by ZC sequence code is a good radar detection signal waveform. |
| Key words: ZC sequence OFDM signal detection characteristics ambiguity function |
