近场源DOA、距离和极化参数联合估计新算法

A new method for DOA,range and polarization estimation of near-field sources

研究近场源波达方向(DOA)、距离和极化参数联合估计问题。利用特殊的线性极化阵列,提出一种基于三阶循环矩的新方法。该方法利用信号的循环平稳特性以及空、时域信息,通过时空矩阵的构造和特征分解获得各参数的闭式解。估计过程中无需谱峰搜索,并且能够抑制任意分布的加性平稳噪声以及具有不同循环频率的干扰信号。计算机仿真实验验证了该方法的有效性。

The joint estimation problem of direction-of-arrival （DOA）, range and polarization of near field sources is investigated. With a special uniform linear array of diversely polarized antennas, a new method based on third-order cyclic moment is presented. By exploiting the cyclostationarity and space-time information of the signals, the parameters are directly given by the eigendeeomposition of certain constructed DOA-matrix. Without peak searching, the proposed method can effectively suppress the additive stationary noises with any distribution and interfering signals with different cyclic frequency. Numerical simulations illustrate the effectiveness of the proposed algorithm.