Disadvantages of mobile communication terminal

Is to keep the communication of objects in a moving state, so it must be wireless communication, or a combination of wireless communication and wired communication.

(2) The propagation conditions of radio waves are complicated.

Because the moving body may move in various environments, electromagnetic waves will produce reflection, refraction, diffraction, Doppler effect and other phenomena in the propagation process, resulting in multipath interference, signal propagation delay and broadening.

(3) serious noise and interference

Automobile spark noise, all kinds of industrial noise, intermodulation interference between mobile users in urban environment, adjacent frequency interference, same frequency interference.