摘要
给出无人机障碍探测系统的结构,并建立圆形阵列天线的探测模型。分析圆形阵列天线的固有特性,即圆形阵列在实际应用时存在固有误差,即阵元互耦、阵元位置误差、通道幅相不一致;并给出阵元互耦误差校正、已知源幅相误差校正、未知源幅相误差校正的方法及步骤,同时采用MUSIC测向方法进行仿真分析。其结果表明,提出的阵元互耦及幅相不一致的校正方法是有效的,从而提高了无人机障碍探测系统的探测精度。
A unmanned aerial vehicle（UAV）barrier detection system is given,a detection model with a circular array antenna established.The characteristics of circular array antenna are analyzed.The circular array has inherent errors in practical applications such as mutual coupling,array element position error,and channel amplitude phase inconsistency.Correction methods are given for mutual coupling errors,and for the known and unknown source amplitude and phase errors.Simulation is carried out using the MUSIC estimation method.The results show that the proposed calibration method,and the mutual coupling and amplitude phase inconsistency correction are effective,and detection accuracy is improved.
出处
《上海电机学院学报》
2014年第4期199-205,共7页
Journal of Shanghai Dianji University
关键词
无人机
探测系统
波达角估计
误差校正
阵元互耦
幅相不一致
unmanned aerial vehicle（UAV）
detection system
direction of arrival（DOA）
error correction
array element mutual coupling
channel amplitude phase inconsistency
