A fast and low-cost 3D beamforming method for joint autonomous positioning

Abstract

The invention belongs to the technical field of communication, and particularly relates to a rapid and low-consumption 3D beamforming method combined with autonomous positioning. The method comprisesthe steps of 1 obtaining a coordinate of a user relative to a base station by an autonomous positioning algorithm; 2 calculating the relative position angle of the base station and the user accordingto the coordinates of the base station and the user; 3 obtaining a first-level codebook fully covered by the wave beam according to the antenna type, the number and the wave beam number, and designinga second-level codebook partially covered by the wave beam by fusing the positioning error; 4 searching in the corresponding codebook according to the departure angle of the base station and the arrival angle of the user to obtain a code word corresponding to each angle, and completing a first stage of beam forming; and 5 performing few times of beam training in a small range by using the second-level codebook fused with the positioning error to obtain a beamforming optimal codeword, thereby reducing the influence of the positioning error on the beamforming algorithm performance. According tothe invention, beam forming is completed by combining the autonomous positioning algorithm; the beam training speed is increased by using the terminal position information; and the beam training overhead is reduced.

Description

technical field [0001] The invention belongs to the field of communication technology, and in particular relates to a fast and low-consumption 3D beamforming method combined with autonomous positioning, which can be used in 5G scenarios to realize beamforming quickly and low-consumption in the case of millimeter wave channels and large-scale antennas. Background technique [0002] In the 5G scenario, the spectrum in the millimeter wave band has been used. The millimeter wave wavelength is short, but the attenuation is large, and more antennas can be used in the terminal. As the number of array antenna elements increases, the array gain also decreases with the interference. While increasing, but narrowing the beamwidth, it becomes a new challenge to select the best beam pair at the transmitter and receiver. The reduction in beamwidth makes beam alignment difficult, especially if the time required for beam alignment is long, which can affect transmission rates. Also, with lar...

AI Technical Summary

Problems solved by technology

[0008] Among the existing beam search algorithms, the exhaustive search algorithm has the best performance, but in the millimeter wave and large-scale antenna systems, there are many problems in the number of searches and the high cost of beam training. In stage search and hierarchical search, although the search The complexity has been improved, but the problem of expensive training in large-scale antenna systems remains to be solved

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