WCDMA

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WCDMA

Wideband Code Division Multiple Access
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WCDMA

(Wideband CDMA) A 3G cellular technology that uses the CDMA air interface. WCDMA works on WCDMA cellphones as well as laptops and portable devices with WCDMA modems. Falling under both the UMTS and IMT-2000 umbrellas, WCDMA enables GSM carriers to provide a higher data rate than the EDGE network. Supporting both voice and data, WCDMA provides a modest speed increase, and many GSM operators jumped to HSPA for data, which is also based on WCDMA, while keeping GSM for voice. See HSPA, UMTS and IMT-2000.

WCDMA and CDMA
Although WCDMA is based on CDMA, its implementation is different. Whereas CDMA uses one or more 1.25 MHz channels, WCDMA uses two 5 MHz channels. WCDMA supports AAC music, AMR speech and MPEG-4 and H.264 video using the .3GP file extension. See cellular generations, Wi-Fi vs. cellular, GSM, CDMA and 3GPP.


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References in periodicals archive ?
But in places like Singapore, where both residential broadband and mobile phone penetration are over 100 per cent, there is little incentive for existing W-CDMA operators (all three in Singapore) to consider Wimax - certainly, not with LTE on the horizon.
DoCoMo serves more than 51 million customers, of which more than half subscribe to FOMA(TM), launched as the world's first 3G mobile service based on W-CDMA in 2001.
"Alcatel-Lucent's backhaul solution resolves the issue of cost-effectively transporting the exponential growth of data services we expect from the deployment of the W-CDMA mobile network," said Stuart Sutton, Chief Technology Officer - Technology and Shared Services, Telecom New Zealand.
Electronics company Siemens Communications, the main supplier for the operator's network upgrade, said the W-CDMA accelerator will meet demand for wireless services such as television on mobile phones.
Using NTT DoCoMo's mobile technology, the Japanese carrier will help KT Freetel build up a mobile infrastructure network based on the W-CDMA technological standard throughout the South, NTT DoCoMo said.
The device provides +27 dBm of W-CDMA linear power output (+45 dBc ACPR).
Much time was spent discussing technical aspects of 3G, such as which standard will prevail: W-CDMA or CDMA2000.
The firms including NTT DoCoMo Inc., Vodafone Group PLC and Cingular Wireless LLC, agreed to establish a unified standard for updated third-generation mobile technology based on the W-CDMA format by 2007 and make high-speed services available as early as 2009, the sources said.
DoCoMo launched the world's first 3G service based on W-CDMA technology with much fanfare in October 2001, but limited coverage area, bulky handsets and poor battery life discouraged customers from signing up.
NORDIC BUSINESS REPORT-12 June 2003-Hutchison to replace Nokia's W-CDMA stations in Hong Kong - report(C)1994-2003 M2 COMMUNICATIONS LTD http://www.m2.com
It provides significantly increased support to more effectively plan their W-CDMA networks throughout the world.