摘要
随着捷变频技术的发展,传统的压制式干扰无法对其工作频点实施精准打击,因而难以达到理想的干扰效果。与之相比,梳状谱干扰能够对捷变频雷达的工作频点进行瞄频干扰,从而解决上述问题。现场可编程逻辑门阵列(FPGA)平台能够利用并行处理的优势,提升对数字信号的处理速度。直接数字频率合成(DDS)技术能够灵活地进行信号合成,常用于雷达信号生成。本文对梳状谱干扰的产生机理进行研究,基于FPGA平台,运用DDS技术,提出一种多频点循环叠加的方法,并基于m序列原理产生随机数对梳状谱信号的相位进行控制,从而对梳状谱干扰波形进行设计与实现。该方法能够通过干扰参数灵活控制干扰波形,干扰频率误差在1%以下。
With the development of frequency agility technology,conventional jamming cannot satisfy the technical requirements,thus bringing the challenges to achieve the ideal jamming effect.In contrast,comb spectrum jamming can conduct frequency-aiming jamming on the working frequency points and resolve the above problems.The field programmable gate array(FPGA)platform utilizes parallel processing to improve the speed of digital signal processing.The DDS technology can flexibly synthesize signals and is frequently used for radar signal generation.This paper has studied the generation mechanism of comb spectrum jamming and conducted the design and implementation of the jamming waveform using the FPGA platform and direct digital synthesis(DDS)technology.A method of cyclic superposition of multi-frequency points and a random phase based on m-sequence was proposed,which can flexibly control the jamming waveform via adjusting its jamming parameters,and the jamming frequency error is less than 1%.
作者
张铭昊
张文旭
陆满君
ZHANG Minghao;ZHANG Wenxu;LU Manjun(School of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Key Laboratory of Advanced Marine Communication and Information Technology,Ministry of Industry and Information Technology,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Shanghai Radio Equipment Research Institute,Shanghai 201109,China)
出处
《空天防御》
2023年第4期74-79,共6页
Air & Space Defense
基金
黑龙江省自然科学基金项目(LH2020F020)。
