信号处理2026，Vol.42Issue(2)：208-220,13.DOI:10.12466/xhcl.2026.02.008
基于相位编码CP-OFDM正交波形的SAR抗干扰研究
An Anti-Jamming SAR Method Based on Phase-Coded CP-OFDM Orthogonal Waveforms
史海旭 1刘天趣 2徐仲秋 2李光祚 2林宽 2梁伟 2洪文2
作者信息
- 1. 中国科学院空天信息创新研究院,北京 100094||目标认知与应用技术国家级重点实验室,北京 100094||中国科学院大学电子电气与通信工程学院,北京 101499
- 2. 中国科学院空天信息创新研究院,北京 100094
- 折叠
摘要
Abstract
With the development of digital technologies and radar systems,jamming techniques against synthetic-aperture radar(SAR)have undergone rapid advancement.In particular,deceptive jamming based on digital radio fre-quency memory(DRFM)poses an unprecedented challenge to SAR imaging systems.In this study,an anti-jamming SAR imaging method is investigated to counter this technique by integrating phase-coded waveforms with cyclic-prefix orthogonal frequency-division multiplexing(CP-OFDM).A pulse compression method based on a linear model is intro-duced in the proposed phase-coded CP-OFDM orthogonal waveform to perform range processing on SAR echoes with the phase-coded waveform based on the cyclic prefix(CP)property;this enables autocorrelation pulse compression free from inter-range cell interference.Optimization of the time-domain phase coding enables improved cross-correlation per-formance among different waveforms.A p-norm multi-waveform weighted cyclic algorithm(p-WeCAN)is improved us-ing the pulse compression method based on a linear model to optimize the phase-coded sequences of the set of CP-OFDM waveforms.The optimized waveforms achieved a cross-correlation peak sidelobe level approximately 2 dB lower than that of a randomly phase-coded CP-OFDM waveform set.The CP ensures good autocorrelation pulse compression performance,while the optimized phase-coding design provides favorable cross-correlation characteristics.Thus,the or-thogonal waveform set can suppress deceptive jamming effectively in SAR imaging.Simulations were conducted to evaluate the capability of the proposed approach to defeat deceptive jamming against SAR imaging for extended and point targets as well as complex scenes reconstructed from echo data collected by the Gaofen-3 satellite in comparison with those obtained using linear frequency modulation pulses,and the results verified the effectiveness of the proposed approach.关键词
SAR抗干扰/CP-OFDM/相位编码/正交波形设计/p-WeCAN优化Key words
SAR anti-jamming/CP-OFDM/phase coding/orthogonal waveform design/p-WeCAN optimization分类
信息技术与安全科学引用本文复制引用
史海旭,刘天趣,徐仲秋,李光祚,林宽,梁伟,洪文..基于相位编码CP-OFDM正交波形的SAR抗干扰研究[J].信号处理,2026,42(2):208-220,13.
