Definition, Betydelse & Anagram | Engelska ordet CDMA

Definition av CDMA

1. förkortning för Code Division Multiple Access

Exempel på hur man kan använda CDMA i en mening

• Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies.
• FHSS is used to avoid interference, to prevent eavesdropping, and to enable code-division multiple access (CDMA) communications.
• The infrastructure of the domestic system consists of microwave radio relay, cable, tropospheric scatter, GSM, and CDMA.
• For example, Daniel Minoli (2009) identifies five principal types of multiple-access schemes: FDMA, TDMA, CDMA, SDMA, and random access.
• For GSM, UMTS and LTE networks, this number was provisioned in the SIM card and for cdmaOne and CDMA2000 networks, in the phone directly or in the R-UIM card (the CDMA equivalent of the SIM card).
• It is a 2G mobile telecommunications standard that uses 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.
• Alternatives include time-division multiple access (TDMA), code-division multiple access (CDMA), or space-division multiple access (SDMA).
• A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.
• The algorithm has found universal application in decoding the convolutional codes used in both CDMA and GSM digital cellular, dial-up modems, satellite, deep-space communications, and 802.
• New OFDMA, FDE and MIMO based radio interface, not backwards compatible with previous CDMA interfaces.
• Devices without a SIM card slot or eSIM capability usually do not have an IMEI code, except for certain early Sprint LTE devices such as the Samsung Galaxy Nexus and S III which emulated a SIM-free CDMA activation experience and lacked roaming capabilities in 3GPP-only countries.
• On June 2, 2008, China Unicom announced its intention to sell its CDMA business and assets to China Telecommunications Corporation (China Telecom Group) for a combined total of 110 billion RMB and to merge the remainder of the company, in a share swap valued at US$56.
• The 3GPP2 website was taken offline in 2023, primarily due to CDMA carriers deploying 3GPP's LTE instead of UMB the decade prior and later shutting down CDMA networks making the 3GPP2 redundant and unneeded.
• Also in that year, LG Electronics made the world's first CDMA digital mobile handsets and supplied Ameritech and GTE in the US, the LGC-330W digital cellular phone.
• To distinguish signals from several different transmitters, frequency-division multiple access (FDMA, used by analog and D-AMPS systems), time-division multiple access (TDMA, used by GSM) and code-division multiple access (CDMA, first used for PCS, and the basis of 3G) were developed.
• The same year, Rogers purchased Microcell Solutions, today known as Fido, Canada's first user of GSM systems as opposed to the more widespread (in North America) CDMA.
• UMB's use of OFDMA would have eliminated many of the disadvantages of the CDMA technology used by its predecessor, including the "breathing" phenomenon, the difficulty of adding capacity via microcells, the fixed bandwidth sizes that limit the total bandwidth available to handsets, and the near complete control by one company of the required intellectual property.
• A random-access channel (RACH) is a shared channel used by wireless terminals to access the mobile network (TDMA/FDMA, and CDMA based network) for call set-up and bursty data transmission.
• A 3G UMTS network in the 850/2100 MHz bands was launched in early 2009 and in March of that year, Pelephone stopped selling cellphones that use the CDMA system.
• The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process.

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