The vector array MVDR beam forming algorithm only suitable for narrow-band signals can estimate the spatial spectrum effectively

and it was difficult to detect the weak target when targets energy differ in large scale.The empirical mode decomposition (EMD) can emphasize signals’ local characteristic and decompose multicomponent signals into many intrinsic mode functions (IMFs).Combining the IMF characteristic and the MVDR narrow-band signal request

this dissertation proposes the vector array mode domain MVDR beam forming algorithm

and considers the IMF’s center frequency as the center frequency.The sea trial results show this algorithm can enhance the weak signal’s spatial spectrum energy

and realize the weak target’s detection effectively in strong interference.