CDMA2000

CDMA1xRTTCDMA 2000CDMA2000 1xCDMA2000 1xRTTCDMA 1X WINCDMA 1xRTTIS-2000CDMA 1xCDMA-2000
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites.wikipedia
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Cell site

cell towercell towerscell phone tower
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites.
The raised structure typically supports antenna and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiver for timing (for CDMA2000/IS-95 or GSM systems), primary and backup electrical power sources, and sheltering.

UMTS

WCDMAW-CDMATD-SCDMA
CDMA2000 compares to UMTS, a competing set of 3G standards, which is developed by 3GPP and used in Europe, Japan, and China.
Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology.

2G

2.5G2.75G2.5
It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea.
Over 60 GSM operators were also using CDMA2000 in the 450 MHz frequency band (CDMA450) by 2010.

3GPP

3rd Generation Partnership ProjectThird Generation Partnership Project (3GPP).3gpp
CDMA2000 compares to UMTS, a competing set of 3G standards, which is developed by 3GPP and used in Europe, Japan, and China.
It should not be confused with 3rd Generation Partnership Project 2 (3GPP2), which developed a competing 3G system, CDMA2000.

Evolution-Data Optimized

EVDOEV-DOEV-DO Rev. A
The intended 4G successor to CDMA2000 was UMB (Ultra Mobile Broadband); however, in November 2008, Qualcomm announced it was ending development of the technology, favoring LTE instead.
EV-DO is an evolution of the CDMA2000 (IS-2000) standard which supports high data rates and can be deployed alongside a wireless carrier's voice services.

3G

IMT-20003G networkIMT
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. CDMA2000 compares to UMTS, a competing set of 3G standards, which is developed by 3GPP and used in Europe, Japan, and China. All are approved radio interfaces for the ITU's IMT-2000.
The first commercial United States 3G network was by Monet Mobile Networks, on CDMA2000 1x EV-DO technology, but this network provider later shut down operations.

CdmaOne

IS-95CDMA2G:''' cdmaOne
It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea. The designation "1x", meaning 1 times radio transmission technology, indicates the same radio frequency (RF) bandwidth as IS-95: a duplex pair of 1.25 MHz radio channels.
It is now being supplanted by IS-2000 (CDMA2000), a later CDMA-based standard.

Code-division multiple access

CDMAcode division multiple accessCDMA-450
It uses multiplexing techniques including code division multiple access (CDMA) as well as time-division access to maximize both individual user's throughput and the overall system throughput.
IS-95, also called "cdmaOne", and its 3G evolution CDMA2000, are often simply referred to as "CDMA", but UMTS, the 3G standard used by GSM carriers, also uses "wideband CDMA", or W-CDMA, as well as TD-CDMA and TD-SCDMA, as its radio technologies.

3rd Generation Partnership Project 2

3GPP23gp23GPP2 Award of Merit
It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea.
In practice, 3GPP2 is the standardization group for CDMA2000, the set of 3G standards based on the earlier cdmaOne 2G CDMA technology.

LTE (telecommunication)

LTE4G LTETD-LTE
The intended 4G successor to CDMA2000 was UMB (Ultra Mobile Broadband); however, in November 2008, Qualcomm announced it was ending development of the technology, favoring LTE instead.
LTE is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks.

Duplex (telecommunications)

half-duplexfull-duplexduplex
The designation "1x", meaning 1 times radio transmission technology, indicates the same radio frequency (RF) bandwidth as IS-95: a duplex pair of 1.25 MHz radio channels.

Qualcomm

Qualcomm Inc.Qualcomm IncorporatedQUALCOMM, Inc.
The intended 4G successor to CDMA2000 was UMB (Ultra Mobile Broadband); however, in November 2008, Qualcomm announced it was ending development of the technology, favoring LTE instead.
Qualcomm pioneered the commercialization of the cdmaOne (IS-95) standard for wireless cellular communications, following up with CDMA2000, an early standard for third-generation (3G) mobile.

4G

4G LTE3G evolution4-G
The intended 4G successor to CDMA2000 was UMB (Ultra Mobile Broadband); however, in November 2008, Qualcomm announced it was ending development of the technology, favoring LTE instead.
The fastest 3G-based standard in the CDMA2000 family is the EV-DO Rev. B, which is available since 2010 and offers 15.67 Mbit/s downstream.

Wireless

wireless communicationwireless communicationswireless internet
CDMA2000 1xEV-DO (Evolution-Data Optimized), often abbreviated as EV-DO or EV, is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access.
Speeds have increased as technologies have evolved, from earlier technologies such as GSM, CDMA and GPRS, through 3G, to 4G networks such as W-CDMA, EDGE or CDMA2000.

Internet access

broadband internetbroadband Internet accessbroadband
CDMA2000 1xEV-DO (Evolution-Data Optimized), often abbreviated as EV-DO or EV, is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access.

Signaling (telecommunications)

signalsignalingout-of-band signaling
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites.

Mobile phone

cell phonemobile phonesmobile
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites.

International Telecommunication Union

ITUInternational Telecommunications UnionInternational Telecommunication Union´s
All are approved radio interfaces for the ITU's IMT-2000.

Telecommunications Industry Association

TIATelecommunications Industry Association (TIA)
In the United States, CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA).

Radio frequency

RFradio frequenciesradio-frequency
The designation "1x", meaning 1 times radio transmission technology, indicates the same radio frequency (RF) bandwidth as IS-95: a duplex pair of 1.25 MHz radio channels.

Telecommunications link

downlinkuplinkforward link
1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the forward link, orthogonal to (in quadrature with) the original set of 64.

Orthogonality

orthogonalorthogonallyorthogonal vector
1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the forward link, orthogonal to (in quadrature with) the original set of 64.

In-phase and quadrature components

quadraturequadrature phaseI-Q signal
1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the forward link, orthogonal to (in quadrature with) the original set of 64.

Data-rate units

Mbit/skbit/sGbit/s
The 1X standard supports packet data speeds of up to 153 kbit/s with real world data transmission averaging 80–100 kbit/s in most commercial applications.

Data link layer

Layer 2Data linkLayer-2
IMT-2000 also made changes to the data link layer for greater use of data services, including medium and link access control protocols and QoS.