Channel estimation method and system based on multi-dimensional Hankel matrix in large-scale MIMO system

The invention belongs to the technical field of wireless communication, and particularly relates to a channel estimation method and system based on a multi-dimensional Hankel matrix in a large-scale MIMO system. The method comprises the following steps: S1, a receiving end receives a signal sent by a base station, and obtains preliminary estimation channel information according to the received signal; s2, constructing a plurality of Hankel matrixes according to the preliminarily estimated channel information; s3, sequentially performing singular value decomposition on the plurality of Hankel matrixes to obtain a plurality of groups of azimuth arrival angle estimation values and channel complex gain coefficient estimation values; s4, selecting a group of azimuth arrival angle estimation values and channel complex gain coefficient estimation values with the highest channel utilization rate; and S5, recovering channel state information based on the selected azimuth arrival angle estimated value and the channel c