基于极化域平滑的宽带循环平稳相干源波达方向估计

DOA estimation of cyclic-correlated wideband sources based on polarization smoothing

提出一种基于极化域平滑的宽带循环平稳相干源波达估计方法。该方法充分利用了信号的循环平稳特性以及信号的极化多样性,解决了宽带相干信号的一维波达方向(DOA)估计问题。该方法在不影响阵列孔径的情况下,进一步提高了可估计的相干信源数目,具有信号选择和噪声抑制能力。仿真结果验证了新方法的有效性。

A new approach for estimating the DOA of cyclic-correlated wideband sources based on polarization smoothing is presented. By exploiting the cyclostationarity and polarization diversity of the sources, the proposed method not only resolves the estimation problem of cyclic-correlated wideband sources, but also increases the number of coherent sources that can be estimated without impacting the aperture of the sensor array. Moreover, the proposed method has the capabilities of signal-selectivity and noise-robustness. Simulation results illustrate the effectiveness of the method.