Hybrid beam forming transmission method and network device

A technology of beamforming and network equipment, which is applied in the field of communication, can solve the problems of not yet having terminals, determining the weight matrix of beamforming in the digital domain, etc.

Active Publication Date: 2016-10-19
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0009] At present, for the digital-analog hybrid beamforming technology, there is no solution for determining the digital-domain beamforming weight matrix and the analog-domain beamforming weight matrix for the terminal, so as to perform digital-analog hybrid beamforming transmission with the terminal

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  • Hybrid beam forming transmission method and network device
  • Hybrid beam forming transmission method and network device

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Embodiment Construction

[0024] In MIMO technology, especially for MU-MIMO technology, the accuracy of channel state information available on the network side will directly determine the accuracy of precoding or beamforming and the efficiency of scheduling algorithms, thereby affecting the overall system performance.

[0025] According to the current LTE signal structure, since the reference signals are placed in the baseband, the channel state required for digital shaping can be obtained through channel estimation. However, since the number of equivalent digital channels formed by analog shaping is less than the number of actual antennas, the dimension of the channel matrix obtained through the reference signal is far lower than the dimension of the complete channel matrix experienced by the antenna end. Therefore, the spatial resolution and interference suppression ability obtained by digital shaping suffer a certain loss. For the analog shaping part, its processing process is closer to the physical...

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Abstract

The embodiment of the invention discloses a hybrid beam forming transmission method and a network device. According to the invention, a network device determines a digital-domain beam forming weight matrix for a first terminal according to a channel measurement result; on the basis of the digital-domain beam forming weight matrix, a group of beam forming weight matrixes is determined; with a simulated forming method, channel measurement is carried out by the beam forming weight matrix group; a beam forming weight matrix is selected from the beam forming weight matrix group and is used as a simulation-domain beam forming weight matrix of the first terminal; and the network device carries out hybrid beam forming transmission based on the determined digital-domain beam forming weight matrix and the selected simulation-domain beam forming weight matrix. Therefore, the digital-domain beam forming weight matrix and the simulation-domain beam forming weight matrix can be determined for the terminal so as to carry out digital-analog hybrid beam forming transmission with the terminal conveniently.

Description

technical field [0001] The present invention relates to the communication field, in particular to a hybrid beamforming transmission method and network equipment. Background technique [0002] In view of the important role of MIMO (Multi-Input Multi-Output) technology in improving the peak rate and system spectrum utilization, LTE (Long Term Evolution, long-term evolution) and LTE-A (LTE-Advanced, the evolution of LTE ) and other wireless access technology standards are built on the basis of MIMO combined with OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology. [0003] The performance gain of MIMO technology comes from the spatial freedom obtained by multi-antenna systems. Therefore, one of the most important evolution directions of MIMO technology in the standardization development process is the expansion of dimensions. [0004] In the base station antenna system adopting the traditional PAS (Passive Antenna System, Pa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/06H04B7/0617H04W72/54H04B7/0626H04B7/0634H04W72/046
Inventor 苏昕李传军
Owner DATANG MOBILE COMM EQUIP CO LTD
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