给出了一种基于多速率信号处理的多频连续波雷达数据采集系统设计和实现方法。分析了抽取的时域和频域特性,针对多频连续波雷达的应用背景,分析了实际系统中抽取比的选择,设计了合适的抗混叠滤波器。给出了一种FIR实现信号抽取的高效结构。在此基础上,完成了数据采集系统的硬件设计和软件设计。该方案具有控制灵活,数据传输高速、稳定等特点。该设计已经成功应用于实际系统。

The paper presents a method about multi-frequency radar data acquisition system designing based on multirate signal processing.Time-domain and frequency-domain characterization of decimation are analyzed.For the multi-frequency radar application background,appropriate anti-alias filter is designed.A high-effective structure of decimation implemented by FIR is discussed.Then,hardware and software of data acquisition system is designed.The system can be controlled flexibly.Proved by experiments,it is a high-speed and stable system.This design has been used in real system.

TN957.52