Mobile communication builds an invisible bridge between two users at geographically distant locations. To meet the growing communication demands of the users, widening the bridge is a direct and effective approach. By increasing antennas at transmitter and receiver sides, multiple parallel spatial channels can be formed, bringing to the multiplication of the bridge width. However, the continuous increase in the number of antennas inevitably leads to a surge in costs and power consumption.
Acquiring CSI in RIS-assisted mobile communication systems
