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Etymologie

Was (wer) ist CDMA$500502$ - definition

FIRST CDMA-BASED DIGITAL CELLULAR TECHNOLOGY

CDMA IS-95A; N-CDMA; Narrowband CDMA; IS95; Cdma1; Cdmaone; CDMA One; IS-95; CDMAOne; IS-95A; CDMA IS-95B; IS-95B

CDMA spectral efficiency

CDMA spectrum Efficiency; CDMA bandwidth efficiency; Spectral efficiency of CDMA; CDMA Spectral Efficiency

CDMA spectral efficiency refers to the system spectral efficiency in bit/s/Hz/site or Erlang/MHz/site that can be achieved in a certain CDMA based wireless communication system. CDMA techniques (also known as spread spectrum) are characterized by a very low link spectral efficiency in (bit/s)/Hz as compared to non-spread spectrum systems, but a comparable system spectral efficiency.

https://en.wikipedia.org/wiki/CDMA_spectral_efficiency

CDMA subscriber identity module

CSIM; CDMA Subscriber Identify Module; CDMA Subscriber Identity Module

A CDMA subscriber identity module (CSIM) is an application to support CDMA2000 phones that runs on a UICC, with a file structure derived from the R-UIM card. By porting the application to the UICC (Universal Integrated Circuit Card), a card with CSIM, SIM, and USIM can operate with all major cellular technologies worldwide.

https://en.wikipedia.org/wiki/CDMA_subscriber_identity_module

CDMA

CHANNEL ACCESS METHOD FOR RADIO COMMUNICATION, ALLOWING MANY TRANSMITTERS TO SEND INFORMATION OVER ONE CHANNEL USING SPREAD SPECTRUM TECHNOLOGY AND A SPECIAL CODING SCHEME; USED IN GPS, CDMAONE, CDMA2000, UMTS, ETC.

CDMA; Code-division; Code-Division Multiple Access; Code division multiplexing; Cdma; Synchronous Code-Division Multiple Access; SCDMA; Synchronous Code Division Multiple Access'; Code-division multiplexing; Code division multiplex; IS683A; S-CDMA; S-cdma; Synchronous CDMA; Code division; Code division multiple access; Collaborative CDMA; Code Division Multiple Access; Synchronous Code Division Multiple Access

Code Division Multiple Access (Reference: telecommunication, mobile-systems)

Wikipedia

CdmaOne

Interim Standard 95 (IS-95) was the first ever CDMA-based digital cellular technology. It was developed by Qualcomm and later adopted as a standard by the Telecommunications Industry Association in TIA/EIA/IS-95 release published in 1995. The proprietary name for IS-95 is cdmaOne.

It is a 2G mobile telecommunications standard that uses code-division multiple access (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. CDMA transmits streams of bits (PN codes). CDMA permits several radios to share the same frequencies. Unlike TDMA "time division multiple access", a competing system used in 2G GSM, 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 multiplexing.

In North America, the technology competed with Digital AMPS (IS-136, a TDMA technology). It was supplanted by IS-2000 (CDMA2000), a later CDMA-based standard.

https://en.wikipedia.org/wiki/CdmaOne