基于DDS技术的多普勒信号模拟器设计

Design of Doppler Signal Emulator Based on DDS Technology

在外场试验条件下对弹丸速度进行测量,不仅测量成本高、周期长,而且在试验条件不允许的情况下,也无法完成对测试系统的验证,针对这些问题,提出了一种基于DDS技术的多普勒信号模拟器设计方案;根据其基本工作原理,硬件上进行了单片机最小系统和DDS最小系统的设计,软件上利用LabVIEW软件构建了虚拟控制平台,并详细分析了系统的控制字和控制时序;结果表明,设计的DDS多普勒信号模拟器整机结构简单,用户可操作性强,且容易升级,可广泛应用于测速雷达及其相关测试平台的检测。

Under the field trial condition, the traditional projectile speed test has high cost and long test cycle, at the same time, the t system can＇ t be confirmed in the situation of trial condition. A design of Doppler signal emulator based on DDS is presented in view of above problem. According to the principle of the design, the smallest single chip system and the smallest DDS system are carried on from the hardware level, and the virtual control platform is constructed by the software of LabVIEW, even more that the control word and the control succession of the system are analyzed detailed. The results indicate that： the designed Doppler signal emulator based on DDS has simple system structure, user feasibility, easy promotion, and can be widely applied to the measurement of the velocity radar and the correlation test platform.