Antenna selection method aiming at energy effectiveness of Massive MIMO (Multiple Input Multiple Output) communication system

Abstract

The invention discloses an antenna selection method aiming at energy effectiveness of a Massive MIMO (Multiple Input Multiple Output) communication system. The antenna selection method comprises the steps of: firstly, determining a large-scale fading factor of each user, selecting an optimal large-scale fading factor from the large-scale fading factors, and then determining an optimal number of sending antennas and a corresponding sub-collection. Based on comprehensive consideration on the power consumption of a transmit-receive end, an antenna selection method for optimal Massive MIMO energy efficiency is provided through analysis, so that the energy efficiency of the Massive MIMO system is improved greatly; when the number of the antennas in a base station is far greater than the number of servable terminals, the provided pre-coding matrix changes an expression of a channel capacity from a logarithm determinant form into an addition logarithm form, so that the resolution problem of the energy efficiency is simplified extremely; for each parameter of the energy efficiency, the number of the antenna on the transmitting end and the servable movable terminal sub-collection are subjected to distribution optimization which is equivalent to combined optimization, so that calculation complexity of the Massive MIMO system is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an energy efficient antenna selection method for a Massive MIMO communication system. Background technique [0002] MIMO (Multiple Input Multiple Output) technology, that is, multiple input multiple output technology, is regarded as one of the key technologies for realizing high-speed information transmission in future communication systems. The development of MIMO technology has gone through point-to-point MIMO, multi-user MIMO and the current Massive MIMO, and each development has had a significant impact on the communication industry. The benefits brought by Massive MIMO are that when the number of base station antennas tends to be infinite, the effects of fast fading and other uncorrelated noises will disappear, so that the throughput and the number of mobile terminals that can be served are independent of the cell scale, and the spectral efficiency...

AI Technical Summary

Problems solved by technology

[0004] Since Massive MIMO is a technology that has just emerged in recent years, the issue of Massive MIMO energy efficiency has not made much progress. Although some research results have been obtained, they mainly focus on improving the energy efficiency of the system through antenna selection. , these research results are not enough to analyze the channel in the process of solving energy efficiency. Some only consider the small-scale fading of the channel, and some only consider the large-scale fading, and the energy consumption of the entire communication system is considered is not comprehensive enough, so the optimization parameters of the proposed method are relatively single, such as only optimizing the number of transmitting antennas, and the complexity is high

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