System and method of multi-user multi-aerial transmission

Abstract

The invention discloses a multi-user multi-antenna transmission method which includes that; step1, the threshold of the space correlation degree is set; the service priority of the user is determined according to the parameters of the user media access control layer; step2, the user which has the highest priority is selected as the first selected user; step3, the space correlation degree of the unselected users and the lately selected user are computed; the users whose space correlation degrees are lower than the space correlation degree threshold construct a under-selected user set; step4, the user which has the highest priority in the under-selected set is selected as the selected user; step5, the step 3 and the step 4 are repeated to finish the selection of the user; the data of the selected user is encoded and transmitted; thereby, the over-layer optimum of the multi-user multi-antenna transmission is realized; the service requirement of the user is fulfilled; meanwhile, the interference among the users is reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication multi-antenna technology, in particular to a multi-user multi-antenna transmission system and method. Background technique [0002] The MIMO (Multiple-input and Multiple-output) technology increases system capacity through spatial multiplexing and multi-user diversity, and has inherent advantages. [0003] In a multi-user MIMO system, it is assumed that M t antennas, and M r antennas, then the channel matrix of user k can be expressed as M r × M t The matrix H k , the signal received by user k is [0004] the y k =H k x+n k [0005] Among them, y k for M r The ×1 vector represents the signal received by user k, n k for M r The ×1 vector represents the interference noise received by user k, where x is M t The ×1 vector represents the signal sent by the base station. [0006] Through the SVD (Singular Value Decomposition, singular value decomposition) method, the wireless...

AI Technical Summary

Problems solved by technology

However, the existing technology is considered from a single physical layer or MAC (Media Access Control, media user access) layer, which cannot simultaneously meet the QoS requirements of each user and maximize the overall transmission capacity of the system. Therefore, it is necessary to jointly consider the physical layer and MAC At the physical layer, by estimating the channel state information of each user and combining the MAC layer parameters of each user, the cross-layer multi-user data transmission optimization in the multi-antenna system is realized.

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