A implementation method to constant beamwidth and adaptive beamforming of broadband signal
Jian Yang, Xu-qi Xi, Yong Chang Yu · 2014
In this paper, based on space re-sampling frequency domain broadband beamforming method combined with MVDR adaptive beamforming method, the broadband constant beamwidth and adaptive beamforming in frequency domain is realized. The beamforming method not only can guarantee the main lobe width of the beam to be constant, but also form relative and stable nulling in the direction of broadband interference. This beamforming method only calculate matrix inversion for one time to get all the reference weight coefficient. It reduces the amount of calculation for avoiding calculating matrix inversion for many times at every frequency bins, witch is necessary to do with conventional frequency domain method.