脉冲多普勒小型数字化中频接收机的设计与实现

针对脉冲多普勒(PD)雷达导引头精密跟踪测量的要求,研究并采用双线插值快速傅里叶变换(FFT)与相位差分鉴频相结合的速度跟踪测量方法和单脉冲角跟踪测量方法。根据数字化中频接收机小型化设计的要求,分别构建以FPGA或DSP为基础的核心子系统,通过对各子系统的有效整合,设计并实现了基于系统功能划分的脉冲多普勒小型数字化中频接收机。测试结果表明,该接收机系统在结构与性能方面均符合设计要求。

Design and Implementation of the Miniaturized and Digitized IF Receiver for a PD Radar Seeker

For the requirement of precision tracking and measurement of the pulse doppler (PD) radar seeker, interpolation fast Fourier transform(FFT) combined with phase-differenced frequency discrimination is studied and used for velocity tracking and measuring, and mono-pulse method is used for angle tracking and measuring. According to the requirement of miniaturization design of the digital intermediate frequency (IF) receiver, core subsystems are respectively designed based on FPGA or DSP. Through effective conformity of the various subsystems, miniaturized and digitized IF receiver is designed and realized based on the system function decompose. The test results prove that the receiver meets the design requirements in structure and performance.