The Universal Mobile Telecommunications System is a mobile communication standard that next to multimedia Services also implies satellite- and ground based transmitters. Unified messaging, interpersonal and video supported communication are the main divisions of application of this technology. Europe has installed its UMTS network in 2002. Two years later Germany adapted this invention for its own purpose.
In the FDD-Mode (Frequency Division Duplex ) the mobile station and the base station send signals in two different frequency ranges: the mobile part sends throughout the Uplink Channel while the Downlink Channel is being occupied by the base station. The rate of data throughput of the FDD-Mode, which is currently being built up in Germany, measures 384 Kbit/s for the Downlink. In the TDD-Mode (Time Division Duplex) the mobile station and the base station use the same frequency band, which means they are sending at different times.
This procedure is technically much more intricate and the rate of complexity intensifies with distance or the movement of a transmitter.
However, there is an achievable rate of transfer of 2 Mbit/s for the Downlink using the W-CDMA in the TDD-Mode.
Meinberg Time and Frequency products are often used for synchronizing UMTS networks and base stations.
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