School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen 518107, China.
School of Electronics and Communication Engineering, Guangzhou University, Guangzhou 510006, China.
Sensors (Basel). 2022 Apr 21;22(9):3197. doi: 10.3390/s22093197.
Interference in SAR imagery will induce false targets or form a mask in specific areas to prevent accurate scene assessment. Traditional anti-jamming methods based on waveform agility require a trade-off between anti-jamming performance and imaging quality in waveform design. In this paper, we proposed a SAR ECCM scheme including a Costas DFC-based random stepped wideband waveform and corresponding imaging processing method. The waveform exhibits high flexibility against forwarding interference due to the decomposition of a wideband signal into multiple pulses with different Costas discrete frequency encoding, carrier frequency and phase modulation. Furthermore, the combination of FCDC and the imaging processing successfully overcomes the Doppler sensitivity of the proposed waveform. Extensive simulations confirmed the superiority of this waveform and processing method under different interference strategies.
干扰合成孔径雷达（SAR）图像会在特定区域产生虚假目标或形成掩模，从而阻止对场景的准确评估。传统的基于波形捷变的抗干扰方法在波形设计中需要在抗干扰性能和成像质量之间进行权衡。本文提出了一种包括基于 Costas 直接频率合成的随机阶跃宽带波形和相应成像处理方法的 SAR 电子对抗（ECCM）方案。该波形通过将宽带信号分解为多个具有不同 Costas 离散频率编码、载波频率和相位调制的脉冲，具有很高的抗转发干扰灵活性。此外，FCDC 的组合和成像处理成功克服了所提出波形的多普勒敏感性。大量仿真证实了在不同干扰策略下，该波形和处理方法的优越性。
