Multi-user uplink and downlink beam alignment method for asymmetric millimeter wave large-scale MIMO

Abstract

The invention provides a multi-user uplink and downlink beam alignment method and device for asymmetric millimeter wave large-scale MIMO, and a medium. The method comprises the following steps: constructing an all-digital multi-directional beam for detecting multiple directions; performing multi-round downlink beam training from the base station end to the user end; controlling the user side to carry out beam judgment according to the received signal, and determining a target downlink sending-receiving beam pair with the maximum receiving power; performing data processing on the received signal, generating training data for predicting an uplink transmission narrow beam, and training a preset neural network; performing online real-time signal detection based on the trained network parameters and the received signal, and predicting a target uplink sending narrow beam; and broadening the target downlink sending narrow beam as a target uplink receiving beam at the base station end according to the fed-back label of the target downlink sending narrow beam. According to the method, rapid alignment of uplink and downlink beams of multiple users is realized with relatively low training overhead and relatively high reliability, and the training process is simplified.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a multi-user uplink and downlink beam alignment method, device and storage medium for asymmetric millimeter-wave massive MIMO. Background technique [0002] With the continuous development of social economy, various applications such as VR, AR, 3D media, and ultra-high-definition video transmission emerge in an endless stream, and the service volume of wireless communication data also shows a significant upward trend. However, as an indispensable carrier for building a new generation of information infrastructure, radio spectrum resources are becoming more and more scarce, and the problem of structural shortage of resources is becoming more and more prominent. [0003] Among them, millimeter wave has great potential for development due to its advantages such as sufficient spectrum resources and high spectrum efficiency, but its characteristics such as...

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Problems solved by technology

[0005] However, the applicant found that, unlike the symmetric MIMO system, if the traditional beam alignment method wants to obtain the uplink and downlink transmit-receive beam pairs under the asymmetric system, it needs to perform beam training separately for uplink and downlink, which requires high requirements. training cost

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