WCDMA

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WCDMA

Wideband Code Division Multiple Access

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, cellular vs. Wi-Fi, GSM, CDMA and 3GPP.


References in periodicals archive ?
The company serves over 55 million customers in Japan, including 48 million using i-mode(TM), the world's most popular mobile e-mail/Internet platform, and 51 million using FOMA(TM), the world's original 3G mobile service based on W-CDMA.
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.
6 W-CDMA, the next generation of cellular telephony
In fact, most upgrades of CDMA, GSM, and W-CDMA base stations can be performed with software, and sometimes firmware upgrades.
Japan's biggest mobile phone service provider, is planning to launch in late May its next-generation mobile phone series based on the W-CDMA technology, marking the global debut for the service.
TDD, 2014-2018 (Units) 41 Exhibit 30: Global LTE TRx Shipment Forecast by Frequency Band, 2014-2018 (Units) 43 Exhibit 31: TDD Frequency Bands, 1800-2700MHz 45 Exhibit 32: LTE-Advanced Release Evolution 48 Exhibit 33: Global W-CDMA TRx Shipments, 2012-2013 (Units) 50 Exhibit 34: Global W-CDMA TRx Market Share by OEM, 2013 (Units) 51 Exhibit 35: Global W-CDMA TRx Market Share by Frequency, 2013 (Units) 52 Exhibit 36: Global W-CDMA TRx Market Share by Frequency, 2012-2013 (Units) 53 Exhibit 37: Global W-CDMA TRx Market Share, Chinese vs.
The joint license for W-CDMA essential patent rights for terminals is aimed at manufacturers of complete wireless terminal devices or modules containing W-CDMA functionality able to communicate with base station type equipment compliant with the W-CDMA Standard.
The RRE-equipped base station comprises a master unit for signal processing and maintenance functions and the RRE for modulating and demodulating both W-CDMA and LTE signals transmitted andreceived via antenna.
Increasing use of 3G mobile phone systems is driving widespread construction and maintenance of W-CDMA base stations.
Tokyo, Japan, July 28, 2005 - (JCNN) - Vodafone announced on July 26 that from early September it will market a new version of its VC701SI Vodafone Connect Card with upgraded firmware to allow customers to roam on W-CDMA networks overseas at high packet transmission speeds of up to 384kbps for downlinks.
W-CDMA is designed to support the evolution from today's GSM, TDMA and PDC systems -- standards widely used in Europe, Asia, the United States and Japan.
Contingent on the conclusion of the capital deal, NTT DoCoMo will contemplate handing over to SK Telecom its W-CDMA technology, a next-generation technology for high-quality mobile phone services, the sources said.