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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。
Aiming at the requirements of precision tracking measurement of pulsed doppler (PD) radar seeker, the speed tracking measurement method combined with two-wire interpolation Fast Fourier Transform (FFT) and phase differential frequency demultiplexing and single-pulse angular tracking method. According to the requirements of miniaturization design of digital IF receiver, the core subsystem based on FPGA or DSP are respectively constructed. Through the effective integration of various subsystems, a pulse Doppler digital IF receiver based on system function is designed and implemented machine. The test results show that the receiver system meets the design requirements both in terms of structure and performance.