CHANNEL PARAMETER ESTIMATION METHOD FOR INTELLIGENT-SURFACE-ASSISTED WIRELESS COMMUNICATION

Disclosed in the present invention is a channel parameter estimation method for an intelligent-surface-assisted wireless communication scenario. The method specifically comprises the following steps: S1, initializing channel parameters; S2, tracking and determining multiple paths in a channel by using different transmission modes of an intelligent surface; S3, on the basis of a space iteration expectation-maximization algorithm, estimating basic parameters such as time delays, angles of arrival, angles of departure, Doppler frequency offsets and complex amplitudes of the multiple paths in the channel, and on the basis of a likelihood function, estimating additional parameters such as incident angles and reflection angles of the multiple paths at an intelligent surface end; and S4, estimating distributed update iterations of the parameters. Compared with the prior art, the channel parameter estimation method provided in the present invention has the advantages of effectively recognizing multiple paths subjecte