论文部分内容阅读
针对相干信号子空间方法须要角度预估的缺陷,提出了一种无须角度预估的宽带聚焦方法.将最小二乘原理应用到矩阵运算中,用离散化的角度构造非奇异的阵列流形矩阵,从而求得聚焦矩阵,不仅无须角度预估,而且避免了阵列流形内插法中贝塞尔函数的计算,有效地降低了运算复杂度.计算机仿真了均匀线列阵下提出方法的方位估计性能,结果表明本方法比阵列流形内插法具有更好的方位估计性能和更短的运算时间.
Aiming at the defects of the method that the coherence signal subspace method need to estimate the angle, a method of wideband focusing without angle estimation is proposed. Applying the principle of least squares to the matrix operation, the non-singular array manifold matrix , So as to obtain the focus matrix, it not only does not require angle estimation, but also avoids the calculation of Bessel function in the array manifold interpolation method, effectively reducing the computational complexity. The computer simulation of the proposed method azimuth The performance is estimated. The results show that this method has better performance of azimuth estimation and shorter computation time than array manifold interpolation.