| dc.description.abstract | The sixth generation of mobile communications (6G) will integrate mobile communications with Near Field Communication (NFC), the Low Earth Orbit (LEO) satellite communications systems (SATCOM), and innovative communications technologies including millimeter waves, and gradually achieve seamless reception and coverage no matter when and where. LEO satellite communication systems are increasingly considered as a potential technology for the sixth generation (6G) of mobile communications.
In the paper, we introduced a hybrid beamforming approach based on a fully connected architecture for massive Multiple-Input Multiple-Output (MIMO) Low Earth Orbit (LEO) satellite communications. Assuming that the channel state information (CSI) is known, we can design hybrid precoders and combiners based on the known channel status information. Previously, some scholars conducted analog beamformer design, making a beamforming codebook, based on the maximum beamforming gain to allocate analog beamformer and point the signal direction. The beam allocation algorithm proposed by previous scholars, but the complexity is high. This article mainly proposed a low-complexity beam allocation algorithm, based on achieving the highest transmission data rate, proposing an algorithm to allocate beamformer, and finally selecting the users to be served next based on the Signal to Interference plus Noise Ratio (SINR), to ensure that there will not a big gap between our algorithm and previous algorithm of results. This means that the users to be served next have a better channel, which can bring about a better communication environment. The proposed algorithm is not far different from the algorithm proposed by scholars in selecting the users to be served next, it reduces the complexity. | en_US |