Transmit Multi-beamforming of Wideband Signals Based on the Focusing Transform

This paper propose a wideband transmit multi-beam forming method based on the focusing transform. This method is by determining the optimal focusing frequency, so that each sub-band of the wideband signal is focused on the optimal focusing frequency by using the focusing matrix, and then the conventional delay-and-sum transmit multi-beam forming algorithm is employed to complete the constant beam-width transmit multi-beam forming. The simulation results show that, in the case of wideband, all the width of main beam array output and the multi-beam pointing can keep in a constant value. The performance of the transmit multi-beam forming by using the optimal focusing frequency is better than by the other frequency.