基于DDS芯片AD9858的复杂雷达信号模拟器设计

设计了一种基于直接数字合成（DDS）的复杂雷达信号模拟器。与传统的频率合成方法相比，DDS合成信号具有频率切换时间短、频率分辨率高、相位变化连续等诸多优点。利用双口随机存储器的高速数据存取与现场可编程门阵列器件的高性能、高集成度相结合，可以克服传统DDS设计中的很多不足，从而设计开发出性能优良DDS系统。

Design of Complicated Radar Signal Simulator Based on DDS Chip AD9858

This paper designs a kind of complicated radar signal simulator based on direct digital synthesis （DDS）. Compared with the traditional frequency synthesis method, the DDS signal has many merits such as the fast frequency switch, high frequency resolution, continuous phase change, etc. Many demerits in traditional DDS design can be overcome by combining the fast data storage and acquisition of dual-port random access memory （RAM） and the high performance ＆ high integration of field-programmable gate array（FPGA） devices, thereby the DDS system with perfect performance will be designed and developed.