摘要
本文提出了一种存在幅相误差下的双基地MIMO雷达角度估计方法.利用三次迭代最小二乘算法估计存在幅相误差下的收、发阵列流形,根据信号子空间和噪声子空间的正交性,无需幅相误差的任何信息,采用MUSIC-like算法得到目标的DOD和DOA,且角度自动配对.针对MIMO雷达孔径扩展的特点,分别通过第一个发射阵元和第一个接收阵元的数据估计收发阵列的幅相误差.与现有算法相比,该方法角度估计的精度不依赖于幅相误差,且能得到幅相误差估计的闭式解.性能仿真表明该方法对幅相误差具有一定的容差性,验证了其有效性和优越性.
An algorithm for joint estimation of angle and gain-phase error for bistatic MIMO radar is presented.Array manifolds associated with transmit and receive arrays in the presence of gain-phase errors can be obtained by tri-iterative least-square method.According to the orthogonality of the signal-and noise-subspace,the direction-of-arrivals（DOAs） and direction-of-departures（DODs） of targets are estimated by exploiting MUSIC-like algorithm without any priori knowledge of gain-phase error,and automatically paired.Based on the unique features of array aperture extension,the gain-phase errors are calculated by utilizing the data of the first transmit sensor and the first receive sensor respectively.Compared with the algorithm available,the bearing estimation precision is independent of the gain-phase errors.The gain-phase errors can be solved in closed-form.Performance simulations demonstrate the tolerance limit of the method proposed,as well as its effectiveness and superiority.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2011年第3期596-601,共6页
Acta Electronica Sinica
基金
国家自然科学基金(No.60736009)
杰出青年基金(No.60825104)
