一种提高二次雷达测距精度的方法

测距精度决定了二次雷达系统的目标分辨能力。针对现有二次雷达测距算法测距精度低的问题，分析了二次雷达的测距原理和引入的误差，提出了改进的自适应测距方法。在不更改二次雷达信号格式和硬件设计的前提下，采用分布式处理方式，使询问机和应答机能自动周期性测试本机内部延时，并在询问应答过程中自动分别扣除本设备的内部延时，从而提高二次雷达系统的测距精度。

A method for improving ranging accuracy of a secondary surveillance radar

The ranging accuracy determines the target resolution of a secondary surveillance radar(SSR) system.For the low ranging resolution problem of existing ranging algorithms for SSR, this paper proposes an improved adaptive ranging method by analyzing the ranging principle and introduced error of SSR.Without changing the SSR signal format and hardware design, the distributed processing method is adopted to automatically and periodically test the internal delay of interrogator and the transponder,and the internal delay is deducted automatically in the process of inquiry-reply, thus improving the ranging accuracy of the SSR system.