一种实用的脉冲压缩多普勒雷达噪声干扰方法

A Kind of Noise Jamming Against Pulse Compression Doppler Rradar

灵巧噪声技术兼有欺骗干扰和噪声干扰的特点,能够更好地利用干扰能量。干扰信号经脉压处理后的时间宽度与乘性噪声干扰的带宽及雷达脉宽有关;而对PD雷达的灵巧噪声干扰,当噪声带宽与PD雷达重频一致时将获得最佳干扰效果。考虑到对PD处理干扰效果好的窄带噪声带宽对脉压处理干扰效果可能不尽如意,无法达到目标信号被压制的干扰效果,提出一种简单实用的二维乘性噪声干扰算法,分别针对目标的距离及多普勒构造乘性噪声信号,使得干扰信号CFAR平面上的分布区域灵活可调。为了进一步简化实现,多普勒维构造的噪声采用随机相位调制,相位调制以一个重频时间为基本单位。仿真验证该方法的有效性。

Blanketing and deception jamming effects could be produced with smart noise jamming at the same time.Multiplicative smart noise bandwidth is related to jamming signal width after pulse compression,when noise bandwidth agrees with pulse repetitive frequency,best effect can be achieved in pulse Doppler radar jamming.Considering noise bandwidth applicable to pulse Doppler,processing may be chilly to pulse compression process,which leads to a detectable jamming signal,a bi-dimension noise modulated jamming method is proposed.Received signals are modulated in both range and Doppler dimension independently,thus jamming signals can be distributed in CFAR plane flexibly.Furthermore,for realization sake,Doppler noise is created by a random phase modulation which is changing in PRI.Finally,the effective of proposed method is demonstrated with the simulation.