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All wireless service providers in Canada are regulated by the Canadian Radio-television and Telecommunications Commission (CRTC), which has been blamed by some for the concentration of wireless service subscribers to only three large national carriers. Though measures have been taken to encourage more competition, critics suggest that more ...
In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM.
Canada: CDMA2000 1xRTT, EV-DO Rev. A 1900 May 2010: May 2014 [52] [53] [54] Operator acquired by Telus. SaskTel Canada: CDMA2000 1xRTT, EV-DO Rev. A 800 Apr 2003: Jul 2017 [55] [56] EV-DO service shut down in Sep 2014. TBayTel Canada: CDMA2000 1xRTT, EV-DO Rev. A 800 / 1900 Dec 2002: Oct 2014 [57] Telus Canada: CDMA2000 1xRTT, EV-DO Rev. A 800 ...
This is a list of the world's thirty largest terrestrial mobile phone network operators measured by number of subscriptions. ... CDMA, EV-DO, GSM, GPRS, EDGE, UMTS ...
The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunication Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology.
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G [1] mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. 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 ...
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.
CDMA is analogous to the last example where people speaking the same language can understand each other, but other languages are perceived as noise and rejected. Similarly, in radio CDMA, each group of users is given a shared code. Many codes occupy the same channel, but only users associated with a particular code can communicate.