It is required to send information with minimum bandwidth. Then we use: Massive MIMO, OFDM, TDM. None of the above. One of the following criteria should be determined by you if you will work in mobile communications companies: Mobile coverage area, The minimum interference, The handover scenarios. All of the above. The shape of mobile cells is not a circle because: It is not compatible with the name of communication type "cellular". It does not achieve the maximum power. Areas of communication cannot be exactly estimated. None of the above.