Block Adaptive Least Mean Square Algorithm for Satellite Multi-beamforming

摘要

Modern satellite communication systems are designed to meet broadband, high-capacity and high-speed service requirements, but spectrum-limited and quality-of-service issues due to spatial multiplexing of spectrum resources can not be ignored. Because of the multicast mode, the interference problem between multi-users in satellite communication is very serious. Therefore, multi-beam forming in the digital domain is the development trend of multi-beam forming structure. In this paper, we propose a block-adaptive least mean square algorithm, which is based on the strong rainfall attenuation of the Ka-band GEO satellite system. The algorithm is applied in the use of 37 array elements evenly arranged phased array antenna to form 7 spot beams. The convergence and tracking characteristics of the improved algorithm are analyzed by comparing the typical LMS algorithm. Finally, a pattern of the given coverage area beam is formed.