To overcome the effect of multi path fading problem available in UMTS, LTE uses Orthogonal Frequency Division Multiplexing (OFDM) for the downlink – that is, from the base station to the terminal to transmit the data over many narrow band careers of 180 KHz each instead of spreading one signal over the complete 5MHz …
Read moreWhat type of modulation is used in cell phones?
Most radio systems and handsets use FM analog modulation that occupies a 25-kHz channel.
Read more