一种基于分布式算法的数字鉴频方法

An Algorithm of Digital Frequency Discrimination Based on Distributed Arithmetic

针对传统接收机中模拟鉴频方法的缺点,提出了一种基于分布式算法的数字鉴频方法。与其他数字鉴频方式不同,该算法无须进行鉴相,而直接采用一阶差分计算目标信号多普勒频移,便于在可编程数字器件中实现,实时计算目标———雷达径向速度。

Aiming at the disadvantages of analog frequency estimation in traditional receiver, this article proposes an algorithm of digital frequency discrimination based on distributed arithmetic. Compared with other similar methods, this algorithm doesn＇t need phase estimation. It estimates signal Doppler frequency shift directly by first-order differential structure. This tech- nique may be easily implemented in programmable digital device, and calculate can target-radar radial velocity.