空管一次雷达抗风电场干扰目标检测方法  

Target Detection of Primary Surveillance Radar in Wind Turbine Clutter

作　　者：冯涛[1] 刘飞虎[2] 安凯[3] 

机构地区：[1]中国人民解放军95483部队 [2]中国人民解放军93897部队 [3]中国人民解放军94326部队

出　　处：《雷达科学与技术》2016年第5期531-536,共6页Radar Science and Technology

摘　　要：近年来,随着风力发电场建设的不断推进,风电场对雷达探测的干扰问题开始引起人们的重视。动目标检测(Moving Target Detection,MTD)技术无法滤除风轮机的非零频回波,进而引起目标遮蔽及虚警上升。为了解决该问题,提出了一种基于目标识别的抗风电场干扰目标检测方法。该方法在飞行器进入风轮机杂波区前,先对预测进入风电场区域的飞行器进行初始目标识别,利用已有算法完成涡扇飞机、螺旋桨飞机或直升机的判定,提高后续识别的准确率;再在飞行器进入风轮机杂波区后,利用4种目标(3种飞行器目标及风轮机目标)的发动机调制(Jet Engine Modulation,JEM)特性进行识别。第二步识别是通过将所有进入波门区域的目标回波信号,转化到频域并提取相关特征量,再采用与飞行器类型相对应的分类器来完成。识别完成后则可以剔出风轮机目标并保留飞行器目标。仿真结果表明该算法可以有效地识别飞行器与风轮机回波,完成风电场中风轮机杂波抑制与飞行器检测任务。In recent years, wind turbine clutter（WTC） caused interference begun to attract attention as the construction of wind farms. Since moving target detection（MTD） can＇t filter out the non-zero frequency ,echoes which reflected from wind turbine, the echoes may cause target shadowing and false alarm rate rises. In order to solving this problem, the author presents a target identification based method. Before aircraft fly into WTC, they are classified into three categories （turbojet aircraft, propeller aircraft or helicopter） using target identification algorithm. Then, after the aircraft flied into WTC, all target echoes which located in range gate will be recognized by jet engine modulation （JEM）. The identification algorithm in second step transforms the echo signals into frequency domain and extracts the relevant features, and then using the type of aircraft corresponded classifier to identify the echo signals. After the identification, the WTC will be ruled out and the aircraft echoes will be reserved. Simulation results prove that the method can effectively identify the aircraft and wind turbine echoes and complete WTC mitigation and aircraft detection tasks.

关 键 词：目标识别 空管 一次雷达 风场 

分 类 号：TN958.2[电子电信—信号与信息处理] TN957[电子电信—信息与通信工程]