HBF system beam selection method and device and computer readable storage medium

A beam and target beam technology, applied in the field of communications, can solve problems such as inapplicability and inability to ensure accurate elimination of interference between users, and achieve the effects of easy implementation, short calculation process time, and good global performance.

Active Publication Date: 2018-05-29
SOUTHEAST UNIV
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Problems solved by technology

For example, multi-level resolution beams can be realized by means of level-by-level division and layer-by-layer search to achieve fast convergence. However, this method is not suitable for multi-user parallel search
The Orthogonal Matching Pursuit (OMP) algorithm takes the weight value of the all-digital system as the target, transforms the approximation of the performance into the approximation of the weight value, and adopts the analog codebook based on the response of the antenna array. Under the condition of sparsity, the HBF weight is approximately equal to the weight of the all-digital system, but this method cannot guarantee that the inter-user interference can be accurately eliminated under the condition of multi-user transmission

Method used

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  • HBF system beam selection method and device and computer readable storage medium
  • HBF system beam selection method and device and computer readable storage medium
  • HBF system beam selection method and device and computer readable storage medium

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Embodiment Construction

[0033] In a massive MIMO HBF system, the base station needs to configure appropriate ABF weights for multi-user transmission. In the embodiment of the present invention, it is assumed that the number of base station antennas is M, and the number of digital channels is N s , serving N in a space-division multiplexing manner usingle-antenna users. The ABF weights use the DFT codebook, and the codebook U has the following format:

[0034]

[0035] Among them, one row is one DFT beam, and there are M beams in total, and the corresponding row number is the beam subscript. The ABF weight matrix is ​​F=ΨU, where for N s ×M-dimensional beam selection matrix, e j Select a vector for the 1×M-dimensional beam on the jth digital channel, only one element is 1, and the rest of the elements are 0. In this embodiment, beam selection is performed on the DFT-based HBF multi-user transmission system, which is equivalent to designing a beam selection matrix Ψ.

[0036] The present inv...

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Abstract

The invention discloses an HBF system beam selection method and device and a computer readable storage medium. The method comprises the following steps of respectively selecting at least one preselected beam with the maximum projection energy for each user according to the projection energy of a direct vision diameter of the user on the beam, wherein the number of all preselected beams is larger than the number of digital channels of an HBF system; and selecting a first number of target beams from all preselected beams according to a rate of arrival of the HBF system, wherein the first numberis the number of the digital channels. The HBF system beam selection method and device and the computer readable storage medium have the advantages of short time consumption of a calculation process and easiness in implementation, and the beam is selected from the global angle of a multi-user transmission system, so that the system has good overall performance.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a hybrid beamforming (HBF) system beam selection method, device and computer-readable storage medium. Background technique [0002] In order to meet the requirements of the mobile communication system of the fifth generation (5th-Generation, referred to as 5G) mobile communication technology for data transmission rate, massive multiple-input multiple-output (Multiple-Input Multiple-Output, referred to as MIMO) technology came into being. Massive MIMO technology can flexibly adjust the beam direction to target users by erecting a large-scale antenna array at the base station. In addition, in massive MIMO systems, incoherent noise and fast fading also disappear when the number of antennas tends to infinity. Moreover, massive MIMO can also provide sufficient spatial freedom for diversity and multiplexing techniques. [0003] In the early massive MIMO technology r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/0413
CPCH04B7/0413H04B7/0617H04B7/0695
Inventor 韩瑜金石
Owner SOUTHEAST UNIV
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