对搜索雷达不等间隔采样问题的分析

在对搜索雷达采样数据的使用过程中，通常认为数据是基于等间隔采样得到的，但实际采样过程中，由 于目标与搜索雷达间存在相对位移，使得搜索雷达针对某一目标的采样数据间隔并不相等，将不等间隔采样数据近 似为等间隔采样数据处理会造成原理性误差。为得到实际的采样间隔，提出利用迭代算法计算不同航迹运动目标的 实际采样间隔。在分析搜索雷达对目标进行搜索和对目标信息进行采样处理过程的基础上，仿真分析不等间隔采样 对运动目标速度信息提取产生的影响，并以一匀速运动目标为例讨论将实际非等间隔采样数据近似为等间隔处理对 目标速度的影响。计算结果表明：搜索雷达对目标的实际采样间隔与目标飞行方向、目标与雷达距离以及目标速度 等存在一定的关联。该分析计算方法对于提高搜索雷达对运动目标的测量精度有一定参考价值。

Analysis of Unequal Interval Sampling for Search Radar

In the search radar sampling using the process data that is based on the data are usually of the sampling interval, but the actual sampling process due to the existence of the relative displacement between the target and the search radar, search radar for a target of the sampled data are not equal, not equal interval sampling data approximately equal interval sampling data processing will be by the principle of error. In order to obtain the actual sampling interval, an iterative algorithm is proposed to calculate the actual sampling interval of different moving targets. In the analysis of search radar target search and target information sampling process based on the simulation analysis of unequal interval sampling to extract moving target velocity information of the impact, and a moving target as an example to discuss the actual non equal interval sampling data approximate to the equal interval of target speed. The results show that the actual sampling interval of target radar is related to target flight direction, target and radar distance, target speed and so on. The analysis and calculation method presented in this paper can be used as a reference to improve the measurement accuracy of moving radar