The invention relates to a fast acquisition method of skip spread spectrum based on folding sampling, belonging to the field of communication technology. Includes the following steps: setting the frequency generator, mixing the signal through the intermediate frequency wideband filter, A/D converter for folding sampling digital broadband signal; coarse acquisition of digital broadband signal, generates an enable signal according to the results of the fine acquisition; set the frequency generator, mixing signal through the intermediate frequency filter, A/D converter sampling fixed digital intermediate frequency signal fine; capture of the digital intermediate frequency signal is not fixed, the successful initial signals for coarse acquisition; and in the fine acquisition after the success of the carrier frequency generator output normal hop rate. The invention also relates to a fast sampling device based on a folded sampling and skip spread spectrum. The method and system can improve the capture speed by reducing the number of points to be searched, so that the false alarm probability can be verified, and the fast and reliable acquisition of the jump spread spectrum system can be achieved.
【技术实现步骤摘要】
【技术保护点】
１．一种基于折叠采样的跳扩频通信系统捕获方法，其特征在于：所述方法包括：步骤１：设置频率发生器，混频后的信号通过中频宽带滤波器，Ａ／Ｄ转换器进行折叠采样得到数字宽频信号；步骤２：对所述数字宽频信号进行粗捕获，根据结果产生细捕获的启动信号；步骤３：设置频率发生器，混频后信号经过中频窄带滤波器，Ａ／Ｄ转换器采样得到数字固定中频信号；步骤４：对所述数字固定中频信号进行细捕获，产生粗捕获的启动信号，在细捕获完成后，频率发生器输出正常跳速的载波。
【技术特征摘要】
【专利技术属性】
技术研发人员：李署坚，文霄杰，孙宇明，宋伟宁，王康，
申请(专利权)人：北京航空航天大学，
类型：发明
国别省市：11
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