Angle-Based Multicast Analog Beamforming with Low Resolution Phase Shifters for LEO Satellite Communications

In this letter, we consider analog beamforming using low resolution phase shifters for multicast satellite communications. The beamforming vectors are constructed to approximate a desired angle gain mask by using a low complexity iterative coordinated phase matching. By employing simulations, we demonstrate that the proposed beamforming design using low resolution phase shifters only has a slight performance loss than existing low resolution and even some high resolution schemes, while the complexity predominately reduces. The robustness performance in angle information error supports the implementation of the angle-based approach.