Hybrid precoding method and device in large-scale MIMO system

A precoding, large-scale technology, applied in the field of hybrid precoding methods and devices, can solve the problem of not considering training overhead and hardware cost at the same time.

Active Publication Date: 2018-08-24
极芯通讯技术(安吉)有限公司
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Problems solved by technology

However, the existing hybrid precoding methods based on mixed time scales are all based on the traditional antenna structure, that is, the fully connected antenna structure and the partially connected antenna structure, without considering the training overhead and hardware cost at the same time.

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  • Hybrid precoding method and device in large-scale MIMO system
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  • Hybrid precoding method and device in large-scale MIMO system

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] Aiming at the deficiencies in the prior art in comprehensively considering power consumption, hardware cost, and CSI overhead, an embodiment of the present invention proposes a hybrid precoding method based on an adaptive connection network and a hybrid time scale that comprehensively considers the above factors.

[0026] figure 1 A schematic structural diagram of a MIMO system with hybrid precoding based on user grouping and mixed time scales is shown.

[0027] Such as figure 1 As shown, consider a massive MIMO system with multiple users in a single base station in a single cell, where M antennas (M>>1), L RF links are configured at the base station, and there ar...

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Abstract

The invention provides a hybrid precoding method and device in a large-scale MIMO system. The method comprises the following steps that all users are divided into a plurality of groups according to aspatial correlation matrix of each user, so as to obtain a plurality of groups of user sets; for each user set, according to the statistical signal leakage noise ratio of the user set, optimal analogprecoding is obtained by combining the hardware constraint conditions of a self-adaptive connection network ACN and an analog phase shifter APS; according to the optimal analog precoding, the connection in the CAN and the phase in the APS are determined, so as to realize hybrid precoding. According to the method and the device in the invention, the hardware complexity, the power consumption and the CSI expenditure can be comprehensively considered, a hybrid precoding scheme of the mixed time scale is realized on the basis of user grouping, and mixed precoding with high energy efficiency, low SCI overhead, low hardware complexity and low computational complexity is realized while a certain average user achievable rate and fairness are ensured.

Description

technical field [0001] The present invention relates to the technical field of communications, and more specifically, to a hybrid precoding method and device in a massive MIMO system. Background technique [0002] Massive multiple-input multiple-output (MIMO) technology improves spectral efficiency by increasing the number of antennas at the base station (M>>1), and has become one of the core technologies in the 5G era. The number of radio frequency (RF) links required in the all-digital precoding technology in massive MIMO is equal to the number of antennas. Since the number of base station antennas is as high as dozens or even hundreds, the hardware cost and power consumption are greatly increased. This kind of all-digital precoding Technology no longer applies. Therefore, low-cost, low-power analog-digital hybrid precoding technology is gradually being widely used. [0003] At present, the hardware structure of hybrid precoding in massive MIMO systems is mainly di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/0417H04B7/0456
CPCH04B7/0417H04B7/0456H04B7/046Y02D30/70
Inventor 滕颖蕾魏敏满毅张勇王莉梁文耀安宁程康
Owner 极芯通讯技术(安吉)有限公司
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