系统工程与电子技术

• 传感器与信号处理 • 上一篇    下一篇

双基地MIMO雷达发射阵列幅相误差的旋转阵列校正法

党晓方, 杨明磊, 陈伯孝   

  1. 西安电子科技大学雷达信号处理国家重点实验室, 陕西 西安 710071
  • 出版日期:2013-12-24 发布日期:2010-01-03

Calibration technique for bistatic MIMO radar array amplitude-phase via array rotation

DANG Xiao-ang, YANG Ming-lei, CHEN Bai-xiao   

  1. National Lab of Radar Signal Processing,Xidian University, Xi’an 710071, China
  • Online:2013-12-24 Published:2010-01-03

摘要:

双基地多输入多输出(multiple-input multiple-output, MIMO)雷达可利用直达波进行幅相误差校正,但当直达波方向测量不准时,现有的校正算法性能会严重恶化。针对此问题,提出了一种新的基于子空间的旋转阵列幅相误差校正算法。该算法通过旋转发射阵列天线得到不同方位角的协方差矩阵,利用子空间算法估计通道的增益和相位误差。该算法无需已知直达波的入射角,只需已知发射阵列天线的旋转角度,即可同时完成发射通道幅相误差和直达波到达角的估计,且性能较好,计算机仿真和实测数据结果验证了算法的有效性。

Abstract:

The bistatic multipleinput multipleoutput (MIMO) radar can estimate amplitude and phase errors via direct wave, but the performance of the current algorithm will degrade greatly in the presence of direct wave estimate error. To deal with this problem, a new method for array amplitude-phase calibration based on subspace algorithm is proposed. After rotating array antenna with various azimuth angles, an array covariance matrix can be calculated and the gain and phase errors are obtained by subspace-based algorithms.Instead of the requirement for the priori information of the direction of arrival (DOA) of the direct wave, this new method needs the accurate angle of rotating array, then it can estimate the DOA of the direct wave and the gain and phase errors of the channel simultaneously. The performance of the proposed method is good, computer simulations and real data are conducted to show the validity of the proposed method.