Self-adaptive transmission method of large-scale MIMO downlink

An adaptive transmission and downlink technology, applied in space transmit diversity, diversity/multi-antenna system, multi-frequency code system, etc., can solve the problem that MIMO technology cannot meet the spectrum efficiency and power efficiency requirements of 5G mobile communication system , to achieve the effects of improving reliability, saving feedback channel resources, and improving spectrum efficiency

Active Publication Date: 2015-06-10
SOUTHEAST UNIV
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Problems solved by technology

[0002] With the rapid development of wireless communication technology, the transmission rate requirements of 5G mobile communication systems are much higher than those of 4G mobile communication systems. Traditional MIMO technology has been unable to meet the requirements of spectrum efficiency and power efficiency of 5G mobile communication systems.

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  • Self-adaptive transmission method of large-scale MIMO downlink
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  • Self-adaptive transmission method of large-scale MIMO downlink

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Consider a single-cell multi-user massive MIMO system such as figure 1 as shown, figure 2 A system block diagram of massive MIMO downlink adaptive transmission is given. Considering the downlink of a multi-user massive MIMO wireless transmission system in a single cell, there are K users in the cell, among which S users use the same ti...

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Abstract

The invention provides a self-adaptive transmission method of a large-scale MIMO downlink. The self-adaptive transmission method of the large-scale MIMO downlink comprises the following steps: firstly, utilizing a stronger correlation of a large-scale MIMO spatial channel to transform the spatial channel into a beam domain through a DFT transformation; in the beam domain, utilizing a maximum system and rate as a criterion to select uses communicate simultaneously, and assigning an optimal transmission beam for each user, thereby determining a transport layer number and a pre-coding matrix for each user; then, by taking inter-user interferences into consideration, calculating a MMSE balanced posterior signal to interference plus noise ratio on each resource element of each transport layer for each user; and then, acquiring an equivalent signal to interference plus noise ratio for each user by an equivalent signal to noise ratio mapping; finally, on the premise that a word error rate of the transmission is ensured, by each client, to be lower than a given value, determining and feeding back a channel quality indicator of each codon, aiming at maximizing the system throughput. By the self-adaptive transmission method of the large-scale MIMO downlink, the reliability of a large-scale MIMO wireless transmission is increased; and an excellent system spectral efficiency is acquired while the system word error rate is ensured to be lower than the given value.

Description

technical field [0001] The invention relates to a massive MIMO link adaptive transmission method, in particular to a massive MIMO downlink adaptive transmission method for simultaneous transmission of multiple users. Background technique [0002] With the rapid development of wireless communication technology, the demand for transmission rate of 5G mobile communication system is much higher than that of 4G mobile communication system, and the traditional MIMO technology can no longer meet the requirements of spectrum efficiency and power efficiency of 5G mobile communication system. The multi-user MIMO wireless transmission technology using large-scale array antennas, that is, massive MIMO wireless transmission technology, provides more space resources to serve multiple users at the same time by setting large-scale array antennas at the base station, and further explores the use of space wireless resource. Massive MIMO wireless transmission system greatly improves the rate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04L27/26
Inventor 高西奇庞渊源孙晨仲文
Owner SOUTHEAST UNIV
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