Radio frequency stealth signal design method based on improved chaotic mapping and WFRFT

• Main Authors: LIU LIMIN, YIN YUANWEI, LIU GUANGXIA, XIE HUI, HAN ZHUANGZHI, LI QI, LIU HEXIONG, SHI LIN
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC DIGITAL DATA PROCESSING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a radio frequency stealth signal design method based on improved chaotic mapping and WFRFT, and relates to the technical field of radar signals. The method comprises the following steps: designing improved one-dimensional chaotic mapping, and carrying out modulation processing of intra-pulse frequency modulation and inter-pulse phase modulation on the improved one-dimensional chaotic mapping; and performing weighted fractional Fourier transform on the modulated composite signal to obtain the radio frequency stealth signal. The stealth signal constructed through the method has good low interception and recognition resistance performance, and the radio frequency stealth performance is good. 本发明公开了一种基于改进混沌映射和WFRFT的射频隐身信号设计方法，涉及雷达信号技术领域。所述方法包括如下步骤：设计改进一维混沌映射，对改进一维混沌映射进行脉内调频和脉间调相的调制处理；对调制处理后的复合信号进行加权分数阶傅里叶变换，得到所述射频隐身信号。通过所述方法构建的隐身信号，具有较好的低截获和抗识别性能，且射频隐身性能良好。