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Channel acquisition method and apparatus

An acquisition method and channel technology, which are applied in the field of channel acquisition methods and devices, and can solve the problems of large dimension of channel matrix and high processing complexity of base stations

Active Publication Date: 2017-03-08
DATANG MOBILE COMM EQUIP CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Since in actual implementation, when the number of base stations N T When it is very large, the dimension of the channel matrix acquired by the base station is very large, so the processing complexity of the base station is very high

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  • Channel acquisition method and apparatus
  • Channel acquisition method and apparatus

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] In the current massive antenna MIMO system, the configuration of the base station antenna usually adopts a two-dimensional base station antenna array. Each column antenna of the base station antenna array can be used as the first dimension base station antenna array, and each row antenna of the base station antenna array can be used as the second dimension base station antenna. The antenna array, that is, the first dimension is the v...

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Abstract

The present invention discloses a channel acquisition method and apparatus. The method comprises the steps of measuring according to a sounding reference signal (SRS) sent by a user device, so as to obtain a three-dimensional multiple-input multiple-output (MIMO) channel matrix of the user device; calculating a first dimension of feature vector and a second dimension of feature vector according to the three-dimensional MIMO channel matrix of the user device, and synthesizing calculation results, so as to obtain a three-dimensional MIMO equivalent channel vector or matrix of the user device; and determining a downlink channel precoding vector or matrix of the user device according to the three-dimensional MIMO equivalent channel vector or matrix of the user device. According to the method and apparatus, the first dimension of feature vector and the second dimension of feature vector of the three-dimensional MIMO channel matrix of the user device are calculated, the calculation results are synthesized, so as to obtain the three-dimensional MIMO equivalent channel vector or matrix of the user device, so that the feature vectors EVD of some antenna channel matrixes are decomposed, and the calculation complexity is lowered.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a channel acquisition method and device. Background technique [0002] TDD (Time Division Duplex, Time Division Duplex) system is a mobile communication system using full-duplex communication technology. In the TDD system, reception and transmission are performed in different time slots of the same frequency channel. In the TDD system, the user equipment sends an uplink pilot signal, such as an SRS (Sounding Reference Signal, Sounding Reference Signal) in an LTE (Long Term Evolution, Long Term Evolution) system, for the base station to measure an uplink channel. According to the channel reciprocity, the base station can obtain the downlink channel, so as to realize the precoding or beamforming of the base station. With the increase of user terminal communication requirements, there are a lot of base station antennas (hundreds or thousands) in the massive a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L5/00H04B7/06
CPCH04L25/02H04L25/0204H04B7/0632H04L5/0048
Inventor 苏昕
Owner DATANG MOBILE COMM EQUIP CO LTD