摘要
针对载有正侧面天线阵的机载预警雷达载机的姿态变化问题,研究了雷达目标检测性能受到的量化影响。首先,建立了载机偏航的几何模型和数学模型;然后,分析了载机线性偏航和二次偏航对目标回波功率和杂波谱的影响;最后,通过仿真实验给出了两种偏航形式下不同速度目标的检测概率。结果表明,载机偏航使目标检测概率明显下降,当偏航角度超过一定限度时,雷达失去检测能力,且二次偏航的影响较线性偏航严重。
Considering the attitude changing of the aircraft carrying the airborne early warning radar with side looking antenna array,the quantitative influence on the target detection performance of the radar is studied.First,the geometry model and mathematic mode of aircraft crabbing is set up,and then the effects of linear and quadratic crabbing on the target echo power and the clutter power spectrum are analyzed.Final-ly,the detection probability of the targets with different velocities is gained under two kinds of crabbing. Simulation results show that the rolling makes the detection probability decrease evidently.When the crab-bing angle goes beyond a limit,the radar has bad detection performance,and the influence of quadratic crab-bing is more obvious than that of linear crabbing.
出处
《雷达科学与技术》
北大核心
2015年第2期167-172,共6页
Radar Science and Technology
基金
国家自然科学基金(No.51309232)
关键词
机载预警雷达
载机偏航
目标回波功率
杂波谱
检测概率
airborne early warning radar
aircraft crabbing
target echo power
clutter spectrum
detection probability
