An electronic device comprises a
processing circuit configured to: acquire multiple pieces of channel information, which are obtained via multiple channel measurements, about an equivalent channel between a first
communication device and a second
communication device, wherein in each channel measurement, the second
communication device obtains a piece of channel information on the basis of a received reference
signal sent from the first communication device, and a reflection
signal sent by an intelligent reflecting surface between the first communication device and the second communication device using a corresponding group of reflection parameters to reflect the reference
signal; and by means of performing joint
processing on multiple groups of reflection parameters used in the multiple channel measurements and the multiple pieces of acquired channel information, determine channel estimations of
multiple integration sub-channels which are capable of representing the equivalent channel together with the reflection parameters of the intelligent reflecting surface.