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Cellular Telecommunications Glossary [0-9]
- a glossary of terms used with cell phone or cellular telecommunications technology
- 1G - First generation.
- This term refers to the first generation cellular systems that were based around analogue technology. The voice channel typically used frequency modulation, and they used FDMA techniques.
- 1XRTT -
- This refers to a CDMA2000 operating mode which uses the basic chip rate of 1.2288 Mcps and a channel bandwidth of 1.25 MHz. 1XRTT systems are often abbreviated to just 1X.
- 2G - Second Generation.
- This term refers to the second forms of cellular telecommunications systems that were introduced. The systems were digital and were oriented to voice with only low speed data services. Systems such as GSM and US-TDMA used a mixture of TDMA and FDMA techniques. IS-95 / cdmaOne was the first CDMA system.
- 3G - Third generation.
- The designation for systems following the 2G systems and they offer high speed data services in addition to the basic voice capability. Typically they use CDMA techniques and include W-CDMA, CDMA2000, and TD-SCDMA.
- 3GPP - Third Generation Partnership Project.
- The group that was set up to produce globally applicable Technical Specifications and Technical Reports for a 3rd Generation Mobile System based on evolved GSM core networks. It produced the standards for W-CDMA (UMTS). Later the scope of the organisation was widened to include the maintenance and development of the GSM Technical Specifications and Reports.
- 3GPP2 - Third Generation Partnership Project 2.
- The organisation that is responsible for the specifications for the 3G developments for CDMA2000.
- 3XRTT -
- The CDMA2000 operating mode at 3 times the basic chip rate of 1.2288 Mcps and having a bandwidth three times that of the 1X system.
- 8-PSK -
- Modulation using Phase Shift Keying with 8 states allowing for coding using 8 bit combinations. This allows for higher data rates to be sent than PSK systems using fewer states, although better signal to noise ratios are required to ensure an acceptable bit error rate.