A MA-RIS-MIMO cascaded channel reconstruction method based on full-area robust phase error clustering

Abstract

The application relates to a MA-RIS-MIMO cascade channel reconstruction method based on a full-area robust phase error clustering, and belongs to the technical field of wireless communication and signal processing. The method comprises the following steps: calculating a preliminary screening geometric distance for a candidate scatterer pair in a BS-RIS link and a RIS-UE link respectively, so as to obtain a to-be-judged path pair; calculating a path phase difference and an optimal fixed phase offset based on the to-be-judged path pair in the whole base station antenna movable area and the RIS aperture range, so as to obtain a robust judgment error; under the constraint of a system global error budget, a path clustering is completed by using a preliminary screening threshold and a robust error threshold; equivalent redistribution is carried out on path gains in a cluster, a representative scattering path is reserved, and a low-dimensional equivalent cascade channel is reconstructed. The application aims to solve the technical problems that the existing technology has high full-path channel modeling dimension and is prone to introducing cascade channel reconstruction distortion.

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