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CDMA2000 是一個 3G 移動通訊標準， 國際電信聯盟 ITU 的 IMT-2000 標準認可的無線電接口，也是 2G cdmaOne 標準的延伸，不需要新的頻段分配，可以穩定運行在現有 PCS 頻段。 根本的信令標準是IS-2000。 CDMA2000與另一個3G標準 UMTS 不兼容。 CDMA2000是美國通訊行業協會（TIA-USA）的註冊商標，並不是一個像CDMA一樣的通用術語。 TIA也註冊了他們的2G cdmaOne標準（AKA IS-95）對應CDMA1X。 CDMA2000是TIA標準組織用於指代第三代CDMA的名稱。 適用於 3G CDMA的TIA規範為IS-2000，該技術本身被稱為CDMA2000。
CDMA2000 是一个 3G 移动通讯标准， 国际电信联盟 ITU 的 IMT-2000 标准认可的无线电接口，也是 2G cdmaOne 标准的延伸，不需要新的频段分配，可以稳定运行在现有 PCS 频段。 根本的信令标准是IS-2000。 CDMA2000与另一个3G标准 UMTS 不兼容。 CDMA2000是美国通讯行业协会（TIA-USA）的注册商标，并不是一个像CDMA一样的通用术语。 TIA也注册了他们的2G cdmaOne标准（AKA IS-95）对应CDMA1X。 CDMA2000是TIA标准组织用于指代第三代CDMA的名称。 适用于 3G CDMA的TIA规范为IS-2000，该技术本身被称为CDMA2000。
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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 chann...
CDMA2000 1xEV-DO (Evolution-Data Optimized), often abbreviated as EV-DO or EV, is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access. It uses multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiple access to maximize both...
1X Advanced (Rev.E)is the evolution of CDMA2000 1X. It provides up to four times the capacity and 70% more coverage compared to 1X.
The CDMA Development Group states that, as of April 2014, there are 314 operators in 118 countries offering CDMA2000 1X and/or 1xEV-DO service.[needs update]
CDMA2000 technology was developed by Qualcommin the late 1990s as an enhancement to the CDMA standard. The intended 4G successor to CDMA2000 was UMB (Ultra Mobile Broadband); however, in November 2008, Qualcomm announced it was ending development of the technology, favoring LTEinstead.
3GPP2 Archived January 23, 2004, at the Wayback MachineStandards and specificationsCDMA经常被广泛和不严格地用来称呼使用CDMA技术实现的 无线网络 及其制式，比较常见的是由 Qualcomm 主要支持和最先投入商用的数字蜂窝电话制式，包括 IS-95 （ CDG 为其申请注册商标为 cdmaOne ）和它的演进版本 IS-2000 （ CDMA2000 ），其他很少这样使用。 由于 WCDMA 和 TD-SCDMA 也使用了CDMA技术，这样的称呼可能会造出一些混乱。 这里需要注意： CDMA（分碼複存技术）理论被应用于 WCDMA 无线接口。 WCDMA无线接口被应用于国际3G标准 UMTS 和日本3G标准——FOMA（由日本电信和沃达丰共同开发）。
The Qualcomm standard IS-2000, known as CDMA2000, is used by several mobile phone companies, including the Globalstar network. The UMTS 3G mobile phone standard, which uses W-CDMA. CDMA has been used in the OmniTRACS satellite system for.
List of CDMA2000 networks - Wikipedia. Contents. hide. (Top) Active networks. Defunct networks. See also. References. List of CDMA2000 networks. A list of CDMA2000 networks worldwide. Active networks. Defunct networks. See also. List of mobile network operators. CDMA frequency bands. List of 5G NR networks. List of LTE networks.
CDMA frequency bands or frequency ranges are the cellular frequencies designated by the ITU for the operation of cdmaOne and CDMA2000 mobile phones and other mobile devices. [1] [2] [3] [4] Frequency bands.
