Angle estimation method in point-to-point multi-antenna communication system

The invention provides an angle estimation method in a point-to-point multi-antenna communication system, and the method comprises the following steps: 1, selecting a layered codebook estimation algorithm, scanning a codebook through the layered codebook estimation algorithm, and carrying out the scanning of the codebook; a transmitting end precoding vector, a receiving end merging vector, a signal-to-noise ratio, a transmitting digital signal and a receiving digital signal which are used in the scanning process are stored as original data; 2, preprocessing the original data to serve as input data; 3, constructing a corresponding neural network according to a preset input dimension, a preset output dimension, the intermediate structure, the loss function and a strategy for preventing gradient disappearance; step 4, training a neural network through the data set, optimizing the neural network by taking minimization of a mean square error of an estimated angle and a real angle as a target, and obtaining an opti