UMTS channel to frequency converter

In case of FDD (Frequency Division Duplex) LTE downlink channel (DL, eNB transmits UEs receive) and uplink channel (UL, UEs transmit eNB receives) are transmitted simultaneously on different frequencies . Also each band is marked by LTE release number where it was defined.

It’s because lower frequencies get reflected by atmospheric bands and cannot penetrate to get through to the satellite . … Therefore, mobile-to-base station (uplink) frequencies are lower than base station-to-mobile(downlink) frequencies.

Mathematically, Frequency = f = c/λ . The frequency is expressed in “per second” or “Hertz”, abbreviated as Hz. In real life networks, the frequency is expressed in Megahertz (MHz) or Gigahertz (GHz).