Look up: TD-CDMA

1. TD-CDMA
   The TDD mode of operation for UMTS UTRA. Intended for use in unpaired spectrum, where FDD (Frequency Division Duplex) is not used. There are two modes - original TDD with a chip rate of 3.84 Mcps operating in a 5MHz bandwidth to co-exist with the UTRA FDD mode and TD-SCDMA with a chip rate of 1.28 Mcps option operating in a bandwidth of 1.6MHz where UTRA FDD spectrum co-existence is not necessary. The original TDD is intended to provide local area coverage and unsymmetrical uplink vs. downlink bit rate at a higher bit rate than FDD.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
2. TD-CDMA
   `TD-CDMA`, an acronym for `Time-division - CDMA`, is a channel access method based on using spread spectrum across multiple date=2002-->--> It is shown that a mixture of Time division multiple access|TDMA and CDMA provides better quality of service for multimedia communications in terms of data thro...
   Found on http://en.wikipedia.org/wiki/TD-CDMA
   
   
3. TD-SCDMA
   Time Division duplex Synchronous CDMA. The narrower band version of TD-CDMA mode of operation for UMTS UTRA. Intended for use in unpaired spectrum, where FDD (Frequency Division Duplex) is not used. Promoted by China, where it may bring the advantages of unsymmetrical uplink vs. downlink bit rate to both local and wide-area coverage.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
4. TD-SCDMA
   `Time Division Synchronous pages=4, 25–28-->--> is an air interface<ref name="whatistdscdma"/> found in UMTS mobile telecommunications networks in China as an alternative to W-CDMA. Together with TD-CDMA, it is also known as `UMTS-TDD` or `IMT 2000 Time-Division` (`IMT-TD`).<r...
   Found on http://en.wikipedia.org/wiki/TD-SCDMA