基于中频数字化仪的板载信号处理器的设计和实现

Design and Implementation of Onboard Signal Processing Based On IF Digitizer

为了满足装备测试小体积下复杂信号的多域分析功能,设计了一种基于中频数字化仪的板载信号处理器(OSP);通过板载信号处理器的硬件设计、属性设定和应用配置,实现了数字下变频、抽取及滤波等数字信号处理功能,把中频数字化仪A/D采集的高速数据流下变频至低速的数据流,极大缓解后端DSP等处理器对高速信号处理的压力、可满足数字化仪的数字信号的预处理要求;该OSP已成功应用到数字化仪模块中,可实现分辨率带宽1Hz^3MHz,满足时域、频域和调制域等不同处理要求。

According to satisfy analyzing complicated signal of multi--domain under small volume in the field of arming test, we re- searched an onboard signal processing （OSP） based on IF digitizer. Through realizations parts of hardware components, attributes setting and application configurations, it completes digital signal processing including downconverters, decimations and filtering. By downconvert- ering the high--speed signals from ADC to baseband, it greatly reduces the stress of processors such as DSP, and finally satisfies the pre- treatment needs of digital signal processing. The OSP has been applied in digitizer module. The experiment shows that osp can satify variety of RBW range from 1 Hz to 3 MHz, and meet different needs of multi--domain such as time domain, frequency domain and modulation do- main.