基于DDS芯片AD9852的雷达回波模拟器设计  

Design of Radar Echo Simulator Based on DDS Chip AD9852

作　　者：蒋智辰 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电子科技》2014年第3期70-72,76,共4页Electronic Science and Technology

摘　　要：基于直接数字频率合成技术DDS的原理,分析了影响DDS频率输出的核心因素。在此基础上仿真验证了相位累加器的位数对DDS频率输出的作用。介绍了一种DDS芯片AD9852并基于这种芯片提出了一种雷达回波模拟器的设计,并分析了DDS芯片的优缺点。该设计能够稳定地产生70 MHz载频的雷达回波,较好地模拟出所需回波。Based on the principle of direct digital frequency synthesis technology DDS, this article analyses the influence of the core factors of DDS output frequency. On this basis, the computer simulation proves the digits of the phase accumulator of DDS output frequency. This article introduces a DDS chip AD9852, and based on this chip, this article proposes a design of radar echo simulator, then analyzes the advantages and disadvantages of DDS chip. The design can be stable to produce 70 MHz carrier frequency of radar echo, needed to properly simulate the echo.

关 键 词：DDS 相位累加器 AD9852 

分 类 号：TN743[电子电信—电路与系统]