Millimeter wave MIMO-NOMA method of downlink broadcast link based on beam aggregation

Abstract

The invention relates to a millimeter wave MIMO-NOMA method of a downlink broadcast link based on beam aggregation, and belongs to the field of communication. In order to solve the problems of user pairing and beam accurate alignment in a downlink broadcast link in the prior art, the invention provides a millimeter wave large-scale MIMO-NOMA method based on beam aggregation. According to the invention, the device is provided, the base station generates a large-scale beam set covering the whole cell through beam forming; wherein a plurality of adjacent beams are gathered together to provide services for a group of adjacent users in a non-orthogonal mode, and an approximately optimal digital precoding matrix is designed according to channel state information by constructing a deep learning architecture and adopting an offline training online application mode, so that interference among the users is reduced, and fairness of users' households is realized. According to the invention, strictbeam alignment between users is not required, and the possibility of NOMA scheme application in downlink millimeter wave MIMO can be increased.

Description

technical field [0001] The present invention relates to a millimeter-wave MIMO-NOMA method for a downlink broadcast link based on beam aggregation, in particular to a downlink broadcast link of massive MIMO technology, non-orthogonal multiple access technology, hybrid beamforming technology, and deep learning technology The invention relates to a millimeter-wave massive MIMO-NOMA method based on beam aggregation, which belongs to the communication field. Background technique [0002] With the explosive growth of connected devices in communication systems, available radio resources have become extremely scarce. In order to alleviate the shortage of wireless resources and increase the transmission rate of communication, a direct method is to use higher frequency frequency band resources. Just like the booming millimeter wave communication in recent years, millimeter wave has been regarded as one of the technologies with great potential because it can provide a wider wireless ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of user pairing and precise beam alignment in the downlink broadcast link existing in the prior art, and to provide a millimeter-wave MIMO-NOMA method for the downlink broadcast link based on beam aggregation; the method adopts multiple Adjacent beams serve a group of adjacent users in a non-orthogonal manner, and design an approximately optimal digital precoding matrix by constructing a deep learning architecture to reduce interference between users and reduce the impact of the NOMA scheme implemented in MIMO. difficulty

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