基于混沌序列的跳频信号源FPGA设计与实现

摘要

A method of the design and implementation of frequency—hopping signal source based on chaotic sequence is proposed. This method, based on FPGA, uses Logistic chaotic circuit as the frequency hopping sequence generator and direct digital frequency synthesize generator as frequency hopping signal source basis, and realizes frequency synthesis on FPGA and digital —analog converting using high—performance AD9777. Experimental tests prove that the signal source has good performance and can meet practical engineering requirements.%提出了一种基于混沌序列的跳频信号源的设计及硬件实现方法；该方法基于FPGA技术,以Logistic混沌映射电路作为跳频序列发生器,以直接数字频率合成器作为跳频信号源的基础；在FPGA上完成数字频率合成,并利用高性能的AD9777实现数模转换；实验测试结果表明,该信号源在2 MHz～32 MHz频率范围内,实现了16个频点的跳变频率且性能良好,能够满足实际工程的需要.