任意频谱结构的连续混沌调频雷达波形设计  

Waveform Design of Arbitrary Spectrum Structure for Continuous-Chaos Frequency-Modulating Radar

作　　者：蒋飞[1] 刘中[2] 胡文[3] 包伯成[2,4] 

机构地区：[1]中国电子科技集团公司第二十八研究所,江苏南京210007 [2]南京理工大学电子工程系,江苏南京210094 [3]南京航空航天大学信息科学与技术学院,江苏南京210016 [4]江苏技术师范学院电气信息工程学院,江苏常州213001

出　　处：《电子学报》2010年第9期2195-2198,共4页Acta Electronica Sinica

摘　　要：连续混沌调频雷达的发射信号采用连续混沌信号实现信号调频,其性能逼近噪声调频信号,避免了离散调频设计中存在的前提限制(如:脉冲持续时间长、频率跳变等).基于混沌动力学理论,提出了连续混沌调频雷达的波形设计方法.该方法根据连续混沌调频信号的动力学模型,设定时间尺度变换函数,调制处于正弦振荡的Colpitts电路频率,可实现任意频谱结构的目标波形输出.该文结合设计实例给出了具体的设计步骤,并分析了设计性能,仿真结果表明该方法是有效可行的.The transmitted signal of continuous-chaos frequency-modulating signal（CCFMS） radar uses continuous chaotic signal to realize frequency modulation.It has performances approaching to those of noise frequency-modulating signal and can avoid the assumptions（e.g.,infinite pulse duration,frequency jump） in discrete frequency-modulating design.Base on chaotic dynamical analysis,a waveform design method of CCFMS radar is proposed.Based on the dynamical model of CCFMS,the proposed method designs the time scaled function and outputs the target waveform with arbitrary spectrum structure by modulating the frequency of Colpitts circuit,which is working in sinusoidal oscillation state.Detailed design steps are given with a concrete design example,and design performances are analyzed.Simulation results verify the validity and feasibility of the proposed method.

关 键 词：连续混沌调频雷达 波形设计 频谱控制 动力学模型 时间尺度变换函数 

分 类 号：TN955[电子电信—信号与信息处理]