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中文摘要：
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。
英文摘要：
The bistatic multiple-input multiple-output （MIMO） radar can estimate amplitude and phase er-rors 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 calcula＇ted 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 simula-tions and real data are conducted to show the validity of the proposed method.
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