雷达低空目标俯仰角提取的偏差补偿技术

Bias Compensation for Radar Low-altitude Target Elevation Extraction

由于多径信号的干扰,单脉冲雷达对低空目标俯仰角的实时测量很难达到靶场外弹道测量的精度要求。结合目前靶场在装雷达系统,研究了掠海巡航飞行低空目标的俯仰角事后提取问题,应用偏差补偿算法从雷达系统实时存储下来的视频信号中提取低空目标俯仰角参数。文中给出雷达系统实时输出的目标俯仰角数据以及应用偏差补偿算法事后提取并进行误差修正的目标俯仰角数据,结果显示,事后俯仰角提取显著改善测量精度,为靶场试验决策提供依据。

In the presence of sea-surface multi-path monopulse radar measure a low elevation target is difficult, and its precision can＇t satisfy the requirement of ballistic trajectory measurement in shooting range. Due to specular reflection causes large peak errors followed by an approximately constant bias in the mono-pulse ratio, while diffuse reflection has random variations which on the average generate a bias in the mono-pulse ratio. We apply the bias compensation algorithm calculate the elevation of low-altitude after measurement from the deposited video frequency signal by the radar system used in navy range,then correct the error of extracted data. The results indicate this method is effective and feasible in the off-line elevation extraction and it can improve the precision of elevation measurement. Then offer the gist for experimentation decision-making.