UMTS is an acronym for Universal Mobile Telecommunications System, which is a Wireless Broadband technology, and essentially one of many variations of 3G (third generation).
TDD
UMTS-TDD is an acronym for UMTS Time Division Duplexing, and is often simply abbreviated to TDD.
TDD effectively duplexes the spectrum being used - allowing both the Downlink and Uplink to use the same frequency range.
Common interfaces used with TDD, are:
TD-CDMA
TD-SCDMA
TD-CDMA
TD-CDMA is an acronym for Time Division Code Division Multiple Access.
IPWireless uses TD-CDMA.
TD-SCDMA
TD-SCDMA is an acronym for Time Division Synchronous Code Division Multiple Access.
W-CDMA
W-CDMA is an acronym for Wideband Code Division Multiple Access.
CDMA2000
CDMA2000 is an acronym for Code Division Multiple Access.
EVDO
CDMA2000-EV-DO (also EVDO and simply abbreviated to EV) is an acronym for CDMA2000 Evolution Data Optimized, and is considered to be a partial hybrid technology combining aspects of both 2G and 3G.
TDD
UMTS-TDD is an acronym for UMTS Time Division Duplexing, and is often simply abbreviated to TDD.
TDD effectively duplexes the spectrum being used - allowing both the Downlink and Uplink to use the same frequency range.
Common interfaces used with TDD, are:
TD-CDMA
TD-SCDMA
TD-CDMA
TD-CDMA is an acronym for Time Division Code Division Multiple Access.
IPWireless uses TD-CDMA.
TD-SCDMA
TD-SCDMA is an acronym for Time Division Synchronous Code Division Multiple Access.
W-CDMA
W-CDMA is an acronym for Wideband Code Division Multiple Access.
CDMA2000
CDMA2000 is an acronym for Code Division Multiple Access.
EVDO
CDMA2000-EV-DO (also EVDO and simply abbreviated to EV) is an acronym for CDMA2000 Evolution Data Optimized, and is considered to be a partial hybrid technology combining aspects of both 2G and 3G.