| 基于DDS的混沌调相信号生成方案 |
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| 引用本文： | 刘诗华,王德石,谢邦勇.基于DDS的混沌调相信号生成方案[J].系统工程与电子技术,2009,31(4):826-829. |
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| 作者姓名： | 刘诗华 王德石 谢邦勇 |
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| 作者单位： | 海军工程大学兵器工程系, 湖北, 武汉, 430033 |
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| 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。
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| 关 键 词： | 直接数字合成 混沌调相 混沌二相编码 信号生成 |
| 收稿时间： | 2007-11-27 |
| 修稿时间： | 2008-01-15 |
Scheme of signal generation of chaotic phase modulation based on DDS |
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| LIU Shi-hua,WANG De-shi,XIE Bang-yong.Scheme of signal generation of chaotic phase modulation based on DDS[J].System Engineering and Electronics,2009,31(4):826-829. |
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| Authors: | LIU Shi-hua WANG De-shi XIE Bang-yong |
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| Institution: | Dept. of Weaponry Engineering, Naval Univ. of Engineering, Wuhan 430033, China |
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| Abstract: | 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 ambiguity characteristics of the signals are researched by the statistic average of wideband ambiguity functions,and the anti-interference performances are analyzed.The simulation examples show the effectiveness of the proposed approaches. |
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