首先对国外几种典型的内定标方案进行了分析比较,并在此基础上提出了采用数字点目标回波作为内定标信号源的内定标方案。根据C波段高分辨雷达的技术要求,着重研究了中频内定标信号源的实现问题。 First of all, several typical internal calibration schemes are analyzed and compared. Based on this, a digital calibration scheme using digital target echo as internal calibration signal source is proposed. According to the technical requirements of C-band high-resolution radar, the implementation of the calibration signal source in IF is emphatically studied.