基于四阶累积量的近场源多参数联合估计

Estimation of joint multi-parameters of near-field sources based on the fourth-order cumulant

提出了一种近场窄带信源多参数联合估计新方法,通过所构造四阶累积量矩阵的特征值及其特征向量就可以直接获得近场源频率、方位及距离三维参数的联合估计,无须峰值搜索,适用于任意高斯噪声环境.与现有方法相比,所提方法有效地避免了阵列孔径损失,而且算法简单高效.仿真综合结果表明了新方法的有效性.

A novel joint multi-parameters estimation method for near-field narrow-band sources is proposed.The frequencies,DOAs（direction of arrival,DOA）and ranges of near-field sources are directly estimated by the eigenvalues and the eigenvectors of the constructed fourth-order cumulant matrices.The proposed method does not require any peak search and can be applied to arbitrary Gaussian noise environment.Compared with several existing methods,the proposed method avoids the loss of array aperture and reduces the computational complexity.The comprehensive simulation results demonstrate the validity of this new method.