Millimeter wave large-scale MIMO system multi-user transmission method based on space division multiple access and interference suppression

Abstract

The invention discloses a millimeter wave large-scale MIMO system multi-user transmission method based on space division multiple access and interference suppression. A base station is provided with a millimeter wave large-scale uniform panel antenna array; a plurality of single-antenna users receive service from the base station on the same time-frequency resource; according to information of wave beam clusters selected by the users, a universal user set is divided into an interference-free user subset and an interference user subset; the space division multiple access transmission method based on double-layer pre-coded codes is adopted to the interference-free user subset, and the transmission method based on interference suppression is adopted to the interference user subset. According to the method, the advantages of two traditional multi-user transmission methods based on space division multiple access and interference suppression respectively are combined, and the bottleneck that in an FDD transmission mode, downlink channel information of a large-scale MIMO system is difficult to obtain is broken through; meanwhile, the computation complexity problem is solved, it is guaranteed that all the users can receive the service from the base station simultaneously, and considerable system performance and speed performance are achieved at limited feedback quantity.

Description

technical field [0001] The present invention relates to a limited feedback method for a multi-user large-scale antenna transmission and multi-antenna reception (multi-user massive MIMO) system under the condition of millimeter wave transmission, in particular to a millimeter wave large-scale antenna based on space division multiple access and interference suppression. Multi-user transmission method for massive MIMO system. Background technique [0002] The operating frequency of today's mobile communication systems is 300MHz-6GHz. This frequency band is generally considered to be the best frequency band for wireless communication, which can create more favorable propagation conditions. With the increase in the number of users and the diversification of data services, the traffic in frequency bands below 6GHz tends to be overloaded, making it difficult to meet the increasing communication rate requirements, while the frequency bands above 6GHz (UHF, VHF) have not been fully u...

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a multi-user transmission method for a millimeter wave massive MIMO system based on space division multiple access and interference suppression. The invention combines space division multiple access and interference suppression. The respective advantages of the traditional multi-user transmission methods break through the bottleneck of the difficulty in obtaining downlink channel information in the massive MIMO system under the FDD transmission mode, and at the same time overcome the computational complexity problem, ensuring that all users can receive the service of the base station at the same time, using limited feedback achieves impressive system and rate performance

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