A Multi-User Multiple Input Multiple Output Interference Alignment Method in Wireless Local Area Network

Abstract

The invention discloses a method for aligning multi-user multiple-input-multiple-output interference in a wireless local area network. The method for aligning the multi-user multiple-input-multiple-output interference in the wireless local area network comprises the steps that (10) a useful channel and an interference channel of an adjacent basic service set are estimated by each user in the wireless local area network, and the useful channel and the interference channel are fed back to an access point in the basic service set; (20) the access point in the basic service set calculates a receiving vector and the interference direction; (30) the interference direction of the access point in the basic service set and the interference direction of an access point in an adjacent basic service set are changed, and a transmitting vector is calculated; (40) the access point in the basic service set feeds the receiving vector forwards to the users; (50) the access point in the basic service set sends data to the users, the users receive the data, and interference aligning is achieved. The method for aligning the multi-user multiple-input-multiple-output interference in the wireless local area network has the advantages that the problem of mutual interference of cells due to the fact that multiple nodes which are transmitted at the same time exist in the wireless local area network in the same frequency range is solved, and system frequency is improved.

Description

technical field [0001] The invention belongs to the technical field of ultra-high-speed short-distance wireless local area network, and specifically relates to a multi-user MIMO interference alignment method in a wireless local area network. Background technique [0002] In order to provide network access for ever-increasing user equipments, more and more access points (abbreviated as APs in the text) have been deployed in some hotspot areas. Since all APs operate on only a few frequency points, as APs are deployed more and more densely, interference between Basic Service Sets (abbreviated as: BSS in the text), especially co-frequency interference, will become a limiting system performance. main factor. [0003] In a wireless network, when all nodes share the same channel for data transmission and reception, in a communication system based on multiple-input multiple-output (abbreviated as MIMO in the text), through space division multiplexing, whether it is a single-user MI...

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Problems solved by technology

[0006] Technical problem: The technical problem to be solved by the present invention is to provide a multi-user multiple-input multiple-output interference alignment method in a wireless local area network. The problem of mutual interference between the incoming cells can be solved, and the system efficiency can be improved

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