针对雷达在现代电子战中所采用的线性调频（LFM）信号形式简单,易被敌方侦察接收机截获,而伪码调相信号对多普勒频移较敏感等问题,提出一种脉间伪码调相脉内线性调频的新的复合调制信号。分析了该信号的复合形式、频域特性,推导了复合信号的模糊函数表达式,最后分析了其距离、速度分辨率、模糊函数特性以及低截获性能。仿真结果表明,该新信号具有图钉型模糊函数和良好的距离及速度分辨率。在高分辨力,抗干扰、低截获方面都显示出独特的优势。%For the problem that the radar signal using linear frequency modulation（LFM） can be easily intercepted by electronic reconnaissance equipment and phase code modulation is sensitive to doppler shift in modern electronic war,a compound modulation LPI radar signal composed of LFM and GOLD phase coded signal is proposed.By the theoretical analysis and computer simulation,it shows that the compound modulation LPI radar signal has a ＇thumbtack＇ ambiguity graph and a better performance for the distance resolution and velocity resolution,and has unique advantage at high resolution,anti-interference performance and LPI performance.
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