Device display control method, electronic device, and communication system

A system, comprising:

• a first positioning unit, wherein the first positioning unit comprises a first antenna array, the first antenna array comprises at least three first antenna elements, and the first positioning unit is mounted on a first display device;
• wherein the first antenna array of the first positioning unit is configured to receive a first signal from a second antenna array of a control device, wherein at least two of the first antenna elements of the first antenna array are distributed in a first direction, and at least two of the first antenna elements of the first antenna array are distributed in a second direction, wherein a distance between any two of the first antenna elements among the at least three first antenna elements that have functions of receiving the first signal is less than or equal to a wavelength of the first signal;
• and
• wherein the first antenna array of the first positioning unit is configured to send a second signal to the second antenna array of the control device, wherein the first signal and the second signal are used to determine a position of a first cursor corresponding to a first pointing position of the control device, and the first cursor is displayed on the first display device.