【摘要】 混沌具有类随机性、对初值敏感、易于产生和控制,频率步进信号易于工程实现和处理,结合二者的优势,提出一种基于混沌序列的随机频率步进雷达信号。介绍了信号产生模型,从理论上推导、分析了该信号的模糊函数和互相关函数性能,给出了信号直接相关和先排序存储、后匹配滤波两种回波处理方法。应用四种典型混沌进行数值仿真,并和已有的线性频率步进信号、高斯和均匀随机频率步进信号进行对比分析。结果表明,混沌随机频率步进信号具有较优良的性能,是一种有潜力的雷达信号。更多还原

【Abstract】 A new radar signal,the chaotic based random stepped frequency signal,is proposed because of characteristics of chaos such as pseudorandom behavior,sensitivity for initial condition,accessibility for generation and control,and easy realization and processing for the stepped frequency signal.A signal model was introduced,then the ambiguity function and the cross correlation function were analyzed theoretically in detail,and two different echo signal processing methods were proposed finally.Numerical simulations based on four typical chaotic maps and two random series show that the designed signal is effective,and promising for radar application.更多还原