Staring Beamforming Method for LEO Satellite Based on Angle Increment Prediction

Supporting IoV is an important application scenario of 5G. For the lack of 5G terrestrial infrastructure, LEO satellite network has become the focus of research. LEO mega-constellations can provide high-speed, secure and full-time global network services for M2M and IoT in 5G network, with its short delay, low path loss and large number of satellites. With the application of mmWave and Massive MIMO, mega-constellation puts forward higher requirements for the accuracy of beam pointing. Frequent beam switching, or channel estimation, will produce greater overhead. According to the angle information for the terminal initiates the access request, and the estimation of the satellite trajectory, the beam direction of the satellite is predicted. By continuously adjusting the beam, the frequency of beam switching is reduced, and the overhead of angle estimation is reduced.