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Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel.
CDMA2000 1X (IS-2000), also known as 1x and 1xRTT, is the core CDMA2000 wireless air interface standard.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. 1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the forward link, orthogonal to (in ...
The Intel XMM modems are a series of 4G LTE, LTE Advanced, LTE Advanced Pro and 5G modems found in many phones, tablets, laptops and wearables (sans 5g-technology) developed by Intel Mobile Communications. [1] Intel Mobile Communications was formed after Intel acquired the Wireless Solutions (WLS) division of Infineon early in 2011 for US$1.4 ...
The Qualcomm Snapdragon modems are a series of 4G LTE, LTE Advanced, LTE Advanced Pro, and 5G NR modems found in many phones, tablets, laptops, watches and even cars. Qualcomm Gobi [ edit ]
W-CDMA, HSUPA, HSDPA ... It is intended to be paired with chips like the MT6595 octa-core smartphone processor which features an integrated 4G modem but no built-in ...
Multi-carrier code-division multiple access (MC-CDMA) is a multiple access scheme used in OFDM-based telecommunication systems, allowing the system to support multiple users at the same time over same frequency band. MC-CDMA spreads each user symbol in the frequency domain.
Huawei CDMA2000 EV-DO USB wireless modem Huawei 3G HSPA+ EV-DO USB wireless modem from Movistar Colombia. There have been several revisions of the standard, starting with Release 0 (Rel. 0). This was later expanded upon with Revision A (Rev. A) to support quality of service (to improve latency) and higher rates on the forward and reverse link.
The CDMA (EVDO) versions do not typically use R-UIM cards, but use Electronic Serial Number (ESN) instead. Until the end of April 2011, worldwide shipments of USB modems surpassed embedded 3G and 4G modules by 3:1 because USB modems can be easily discarded.