CDMA2000 is a family of 3G mobile telecommunications standards that use CDMA, a multiple access scheme for digital radio, to send voice, data, and signaling data (such as a dialed telephone number) between mobile telephones and cell sites. 0G refers to pre-cellular mobile telephony technology. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Mobile Telephone System (MTS) was one of the earliest mobile telephone standards. ... The Improved Mobile Telephone Service (IMTS) is a pre-cellular VHF/UHF radio system that links to the PSTN. IMTS was the radiotelephone equivalent of land dial phone service. ... The Advanced Mobile Telephone System was a 0G method of radio communication, mainly used in Japanese portable radio systems. ... Autotel (also called PALM, or Public Automated Land Mobile) is a radiotelephone service which was the missing link between earlier MTS/IMTS and later cellular telephone services. ... ARP (Autoradiopuhelin, Car Radio Phone in English) was the first commercially operated public mobile phone network in Finland. ... 1G (or 1-G) is short for first-generation wireless telephone technology, cellphones. ... For other meanings of the abbreviation, see: NMT. NMT (Nordisk MobilTelefoni or Nordiska MobilTelefoni-gruppen, Nordic Mobile Telephone in English) is a mobile phone system that was specified by the Nordic telecommunications administrations (PTTs) starting in 1970, and opened for service in 1981 as a response to the increasing congestion... This article is about AMPS, the North American mobile phone system standard; AMPS is also an initialism for the All Media and Products Survey published by the South African Advertising Research Foundation. ... hicap is a mobile techonology which has a consumer interface with a wide variety of industry references. ... Cellular Digital Packet Data (CDPD) uses unused bandwidth normally used by AMPS mobile phones between 800 and 900 MHz to transfer data. ... Mobitex is a paging network developed by Ericsson. ... DataTac is a wireless data network technology originally developed by Motorola and deployed in the United States as the ARDIS network. ... 2G (or 2-G) is short for second-generation wireless telephone technology. ... The Global System for Mobile Communications (GSM) is the most popular standard for mobile phones in the world. ... Iden is also a village in East Sussex, England Integrated Digital Enhanced Network, commonly refered to as iDEN, is a mobile communications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone. ... IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS). ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Personal Digital Cellular (PDC) is a 2G mobile phone standard developed and used exclusively in Japan. ... Circuit Switched Data, often known as CSD, is the original form of data transmission developed for the GSM mobile phone system. ... 2. ... General Packet Radio Service (GPRS) is a mobile data service available to users of GSM mobile phones. ... High-Speed Circuit-Switched Data (HSCSD), is a development of Circuit Switched Data, the original data transmission mechanism of the GSM mobile phone system. ... Wideband Integrated Dispatch Enhanced Network, or WiDEN, is a software upgrade developed by Motorola for its iDEN enhanced specialised mobile radio (or ESMR) wireless telephony protocol. ... A 2G mobile phone is a circuit switched digital mobile phone. ... Enhanced Data rates for GSM Evolution (EDGE) is a digital mobile phone technology which acts as a bolt-on enhancement to 2G and 2. ... 3G (or 3-G) is short for third-generation mobile telephone technology. ... W-CDMA (Wideband Code Division Multiple Access) is a type of 3G cellular network. ... Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) mobile phone technologies. ... FOMA, officially short for Freedom of Mobile Multimedia Access, is the brand name for the 3G services being offered by Japanese mobile phone operator NTT DoCoMo. ... TD-SCDMA (Time Division Synchronous Code Division Multiple Access) is a 3G mobile telecommunications standard, being pursued in the Peoples Republic of China by the Chinese Academy of Telecommunications Technology (CATT), Datang and Siemens AG, in an attempt to develop home-grown technology and not be dependent on Western... High-Speed Downlink Packet Access or HSDPA [1] is a new mobile telephony protocol. ... HSUPA, High-Speed Uplink Packet Access, is a data access protocol for mobile phone networks with extremely high upload speeds up to 5. ... 4G (or 4-G) is short for fourth-generation the successor of 3G and is a wireless access technology. ... 3G (or 3-G) is short for third-generation mobile telephone technology. ... General Information Generically (as a multiplexing scheme), code division multiple access (CDMA) is any use of any form of spread spectrum by multiple transmitters to send to the same receiver on the same frequency channel at the same time without harmful interference. ... This article needs to be cleaned up to conform to a higher standard of quality. ... The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device which is used to transmit and receive sound (most commonly voice and speech) across distance. ... Cellular redirects here. ...

CDMA (Code Division Multiple Access) is a mobile digital radio system that transmits streams of bits and whose channels are divided using codes (PN sequences). CDMA permits many radios to share the same frequency channel. Unlike TDMA (Time Division Multiple Access), a competing system used in GSM and D-AMPS, all radios can be active all the time, because network capacity does not directly limit the number of active radios. Since larger numbers of phones can be served by smaller numbers of cell sites, CDMA-based standards have a significant economic advantage over TDMA-based standards, or the oldest cellular standards that used Frequency Division Multiple Access. General Information Generically (as a multiplexing scheme), code division multiple access (CDMA) is any use of any form of spread spectrum by multiple transmitters to send to the same receiver on the same frequency channel at the same time without harmful interference. ... This article needs to be cleaned up to conform to a higher standard of quality. ... This article is about the unit of information. ... // PN SEQUENCES --Rdschwarz 15:28, 20 August 2005 (UTC) Spread Spectrum technology is being applied to many areas of modern communications such as Wireless Lans, Cellular Telephones, Global Positioning System (GPS), and Very Small Aperture Satellite Terminals (VSAT) just to name a few. ... Time Division Multiple Access (TDMA) is a technology for shared medium (usually radio) networks. ... Not to be confused with Get Some Mates The Global System for Mobile Communications (GSM) is the most popular standard for mobile phones in the world. ... IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS). ... FDMA, or frequency-division multiple access, is the oldest and most important of the three main ways for multiple radio transmitters to share the radio spectrum. ...

CDMA2000 has a relatively long technical history, and remains compatible with the older CDMA telephony methods (such as cdmaOne) first developed by Qualcomm, a commercial company, and holder of several key international patents on the technology. Interim Standard 95 (IS-95), is the first CDMA-based digital cellular standard pioneered by Qualcomm. ... Qualcomm NASDAQ: QCOM is a wireless telecommunications research and development company based in San Diego, California. ...

CDMA2000 is an incompatible competitor of the other major 3G standard W-CDMA (UMTS). Since CDMA2000 is based on older standards, many authorities speculate that the incompatible CDMA standards exist so that US, European and other countries might assure a domestic market and patent protections for their mobile phone providers. W-CDMA (Wideband Code Division Multiple Access) is a type of 3G cellular network. ... Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) mobile phone technologies. ...

CDMA2000 is one of the approved radio interfaces for the ITU's IMT-2000 standard and a successor to 2G CDMA (IS-95, branded cdmaOne). It is standardized by 3GPP2. Monument in Bern, Switzerland. ... IMT-2000 (International Mobile Telecommunications-2000) is the global standard for third generation (3G) wireless communications as defined by the International Telecommunication Union. ... 2G (or 2-G) is short for second-generation wireless telephone technology. ... General Information Generically (as a multiplexing scheme), code division multiple access (CDMA) is any use of any form of spread spectrum by multiple transmitters to send to the same receiver on the same frequency channel at the same time without harmful interference. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... This article needs cleanup. ...

CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States, not a generic term like CDMA. TIA has branded their 2G CDMA standard (aka IS-95) as cdmaOne. General Information Generically (as a multiplexing scheme), code division multiple access (CDMA) is any use of any form of spread spectrum by multiple transmitters to send to the same receiver on the same frequency channel at the same time without harmful interference. ... General Information Generically (as a multiplexing scheme), code division multiple access (CDMA) is any use of any form of spread spectrum by multiple transmitters to send to the same receiver on the same frequency channel at the same time without harmful interference. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...

There are many different types of CDMA2000. In order of increasing complexity:

CDMA2000 1x

CDMA2000 1x, also known as 1x, CDMA2000 1X, 1X, or 1xRTT (1x Radio Transmission Technology), is the core 3G CDMA2000 technology. The designation 1x is used to identify the version of CDMA2000 radio technology that operates in a pair of 1.25-MHz radio channels (one times 1.25 MHz, as opposed to three times 1.25 MHz in 3xRTT). 1xRTT almost doubles voice capacity over IS-95 networks. Although capable of higher data rates, most deployments have limited the peak data rate to 144 kbit/s. While 1xRTT officially qualifies as 3G technology, 1xRTT is considered by some to be a 2.5G (or sometimes 2.75G) technology. This has allowed it to be deployed in 2G spectrum in some countries which limit 3G systems to certain bands. 2. ... A 2G mobile phone is a circuit switched digital mobile phone. ...

The air interface standard of this second generation of CDMA digital cellular is denoted as IS-2000. The main differences between IS-95 and IS-2000 signalling are: the use of a pilot signal on the IS-2000 reverse link to permit the use of coherent modulation, and 64 more traffic channels on the forward link that are orthogonal to the original set. Some changes were also made to the data link layer to accommodate the greater use of data services—IS-2000 has media and link access control protocols and QoS control. In IS-95, none of these were present, and the data link layer basically consisted of a "best effort delivery" RLP—this arrangement is still used for voice. General Information Generically (as a multiplexing scheme), code division multiple access (CDMA) is any use of any form of spread spectrum by multiple transmitters to send to the same receiver on the same frequency channel at the same time without harmful interference. ... In telecommunication, a pilot is a signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes. ... In radio communications, the reverse link (sometimes called a return link) is the link from a mobile user to a fixed base station. ... In radio communications, a forward link is the link from a fixed location (e. ... In mathematics, orthogonal is synonymous with perpendicular when used as a simple adjective that is not part of any longer phrase with a standard definition. ...

In the United States, Verizon Wireless, Sprint PCS, Alltel, and U.S. Cellular use 1x. Verizon Wireless, headquartered in Bedminster, New Jersey, owns and operates the second largest wireless network in the United States. ... This article is about the telecommunications company; see sprints for the running term. ... Alltel NYSE: AT is a telecommunications company located in Little Rock, Arkansas. ... U.S. Cellular (NYSE: USM) is a cellular telephone provider based in the United States. ...

CDMA2000 3x

CDMA2000 3x utilizes a pair of 3.75-MHz radio channels (i.e., 3 X 1.25 MHz) to achieve higher data rates. The 3x version of CDMA2000 is sometimes referred to as Multi-Carrier or MC. The 3x version of CDMA2000 has not been deployed and is not under development at present.

CDMA2000 1xEV-DO

CDMA2000 1xEV-DO (1x Evolution-Data Optimized, originally 1x Evolution-Data Only), also referred to as 1xEV-DO, EV-DO, or just DO, is an evolution of CDMA2000 1x with High Data Rate (HDR) capability added and where the forward link is time-division multiplexed. This 3G air interface standard is denoted as IS-856. (Redirected from 1xEV-DO) Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ... Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ... (Redirected from 1xEV-DO) Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ... Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ... Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ...

CDMA2000 1xEV-DO in its latest revision, Rev. A, supports downlink (forward link) data rates up to 3.1 Mbit/s and uplink (reverse link) data rates up to 1.8 Mbit/s in a radio channel dedicated to carrying high-speed packet data. 1xEV-DO Rev. A was first deployed in Japan and will be deployed in North America in 2006. The Rev. 0 that is currently deployed in North America has a peak downlink data rate of 2.5 Mbit/s and a peak uplink data rate of 154 kbit/s. (Redirected from 1xEV-DO) Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ...

Verizon Wireless, Sprint Nextel Corporation, Bell Canada, and TELUS are in the midst of nationwide deployment of 1xEV-DO in North America, and Alaska Communications Systems (ACS) is deploying 1xEV-DO in the main population centers of Alaska. Verizon Wireless, headquartered in Bedminster, New Jersey, owns and operates the second largest wireless network in the United States. ... Sprint Nextel Corporation (NYSE: S), headquartered in Reston, VA, is one of the largest telecommunications companies in the United States. ... Bell Canada Enterprises, legally BCE Inc. ... TELUS (TSX: T, NYSE: TU) is a telephone company in Canada, the countrys second-largest telecommunications carrier after Bell Canada. ...

Japanese operator KDDI uses the brand "CDMA 1X WIN" for their CDMA2000 1xEV-DO network, but this is only in reference to its building on past marketing promotions. KDDI Corporation is a Japanese telecommunication operator formed in October 2000 through the merger of DDI, KDD, and IDO Corp. ... (Redirected from 1xEV-DO) Evolution Data Only,Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in Japan, Korea, the United States and Canada, as part of the CDMA2000 standard. ...

CDMA2000 1xEV-DV

CDMA2000 1xEV-DV (1x Evolution-Data and Voice), supports downlink (forward link) data rates up to 3.1 Mbit/s and uplink (reverse link) data rates of up to 1.8 Mbit/s. 1xEV-DV can also support concurrent operation of legacy 1x voice users, 1xRTT data users, and high speed 1xEV-DV data users within the same radio channel.

In 2005, Qualcomm put the development of EV-DV on an indefinite halt, due to lack of carrier interest, mostly because both Verizon Wireless and Sprint are using EV-DO. Qualcomm NASDAQ: QCOM is a wireless telecommunications research and development company based in San Diego, California. ...

External links

• UMTS/3G Resources
• Radio-Electronics.Com Article on CDMA2000 1xEV-DO
• TIA CDMA2000 Standards documentation
• PN Sequences