基于DDS的混沌调相信号生成方案  

Scheme of signal generation of chaotic phase modulation based on DDS

作　　者：刘诗华[1] 王德石[1] 谢邦勇[1] 

机构地区：[1]海军工程大学兵器工程系,湖北武汉430033

出　　处：《系统工程与电子技术》2009年第4期826-829,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金资助课题(10272113)

摘　　要：针对现代雷达信号所应具备的特性,提出了基于直接数字合成技术(DDS)的混沌调相信号和混沌二相编码信号生成方案。该方案利用直接数字合成技术和混沌序列复本相关技术,将混沌序列作为相位控制字的输入,可得到混沌调相信号和混沌二相编码信号。通过宽带模糊度函数统计平均方法研究了信号的模糊特性,并对信号的抗干扰性能进行了分析,仿真试验证明了该算法的有效性。According to the properties of modern radar signals, the generating schemes of chaotic phasemodulated signals and chaotic bi-phase coded signals on the basis of direct digital synthesis technology （DDS） are presented. With DDS and duplicate correlation method, the chaotic sequence is chosen as a phase control word. Then, the chaotic phase-modulated signals and chaotic bi-phase coded signals are generated. The ambigu- ity characteristics of the signals are researched by the statistic average of wideband ambiguity functions, and the anti-interference performances are analyzed. The simulation examplesshow the effectiveness of the proposed approaches.

关 键 词：直接数字合成 混沌调相 混沌二相编码 信号生成 

分 类 号：TN957[电子电信—信号与信息处理]