The development of radar receiving technique is summarized in the article. Direct digital syn-thesis(DDS) has many advantages, e. G. , high frequency resolutions, fast frequency switching speed, low phase noise, the ability to switch frequencies while maintaining constant phase and the ability to produce arbitrary waveforms. Now this technology has been widely used in the fields of radar, communication, electronic warfare, etc. The principle and basic structure of DDS are discussed, and the formation of arbitrary radar waveforms based on DDS technique is analyzed. Then, the advantages and disadvantages of using DDS to produce arbitrary radar waveforms are illuminated, and the methods of decreasing spur are presented. The results show that the DDS technique can form all kinds of radar waveforms accurately.%首先概述了雷达接收技术的发展,雷达接收技术已向数字化方向发展.DDS具有频率分辨率高、频率转换速度快、频率转换时相位连续、输出相位噪声低和可以产生任意波形等优点.DDS技术已在雷达、通信、电子对抗等领域得到广泛应用.论述了DDS的工作原理、基本结构,分析了基于DDS技术的任意雷达信号波形的形成,阐明了使用DDS产生任意雷达信号波的优缺点,并提出了减少杂散的方法.结果表明,DDS技术可以精确地形成所需要的各种雷达信号波形.
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