Design method and training method of large-scale antenna training codebook under equal power constraint

Abstract

The invention discloses a design method and a training method of a large-scale antenna training codebook under an equal power constraint in the technical field of wireless communication. The inventionis suitable for a large-scale antenna array system under equal-scale constraints by adopting an analog transceiving structure. The invention helps improve performance of a codebook based on a hierarchical search scheme based on the multi-resolution codebook. According to the design method virtual sub-array technology and multi-beam space synthesis technology are comprehensively applied. The problem of beam gain fluctuation caused by coupling between virtual sub-arrays is solved through the phase compensation technology, and a foundation is laid for self-adaptive beam alignment while codebookgeneration efficiency is improved. Equal-power constraints are applied to each antenna of the phase shift array, and array gain is fully utilized while the defect that a radio frequency switch needs to be configured in a traditional analog codebook generation method is overcome. The wave beam gain fluctuation problem in a code word main band is effectively restrained through the phase compensationtechnology, and a flat wave beam pattern is achieved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a subarray-based multi-resolution codebook generation and adaptive beam training method under equal power constraints. Background technique [0002] The capacity of mobile communication is growing explosively. In order to meet this demand, the frequency band of wireless communication is getting higher and higher. At present, it has developed from microwave frequency band to millimeter wave or even terahertz band to obtain sufficient spectrum resources. However, compared with the existing mobile communication systems operating in the low frequency band, there is serious transmission loss in the high frequency band wireless transmission. However, for high-frequency wireless communication systems, the shorter wavelength makes it possible to integrate more antennas with the same size while severe high-frequency transmission loss occurs. Therefore, it is an effective sol...

AI Technical Summary

Problems solved by technology

However, when the RF chain (Radio-Frequency chain, RF chain) is limited, it is extremely difficult to pursue these technical indicators at the same time, because the phase adjustment results of different phase shifter groups cannot be directly added to the array, Can only be synthesized in the spatial angle domain, which leads to coupling problems between subarrays

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