Bi-rotation signal subspace approach to joint estimationfor signal frequencies and directions of arrival
Hu Xuelong · Journal of Yangzhou University · 2004
A new approach to jointly estimate spatial signal frequencies and directions of arrival (DOA) based on bi-rotation signal subspace is proposed. The two rotation matrixes are derived to transform signal subspace and obtain new subspaces. With this method the frequencies and DOA can be estimated simultaneously. A simple array structure consists of M sensors. In middle SNR, computer simulation shows the approach has good performances in resolution and speed.