宽频段空间相干信号三维参数联合估计算法

基于非均匀的L型阵列,提出一种宽频段相干信号频率和二维到达角联合估计的新方法——JSDOA算法。该算法利用阵列时空数据构造了一个平滑的波达矩阵,通过对其进行特征分解估计出相干信号的三维参数。该算法能精确地估计具有相同数字频率的相干信号的三维参数,避免了阵列孔径损失,具有计算量小,三维参数自动配对的优点。计算机仿真结果验证了算法的有效性。

A New Method for Joint Estimation of 3 - D Parameters of Coherent Signals over Wide Frequency Band

Based on non-uniform L-shaped array,a new method is presented to estimate the frequency and 2-D arrival angles of coherent signals over a wide frequency band,which is called joint smoothing DOA(JSDOA) algorithm.The smoothed DOA matrix is constructed by using the temporal and spatial data of L-shaped array,and then 3-D parameters of coherent signals can be obtained via the analysis of its eigenvalue.The algorithm is precise in estimating 3-D parameters of coherent signals with same digital frequency,thus avoiding the loss of array aperture with smaller computational load and parameters paired automatically.The simulation results confirm its effectiveness.