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
To ensure that even the slightest deviation is detected in a W-CDMA signal, test instrumentation is designed with advanced platforms so analysis can be conduced at high speed.
According to the online magazine Unstrung, the fallout may jeopardize Nokia's long-term desire to dominate the W-CDMA network market.
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.
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.
Fujitsu Media Devices Ltd have developed two new components designed to be used in W-CDMA mobile devices.
Tokyo, Japan, Dec 21, 2006 - (JCN Newswire) - Anritsu Corporation (TSE:6754), a global leader in communications equipment and measuring instruments, has announced the launch of its compact MS2720B Spectrum Analyzer series, the world's first handheld analyzer to support all Regulation* test items for installation 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.