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Emerging Technology » WCDMA / 3G

 
Technology

WCDMA / 3G

Full Name

Wideband Code Division Multiple Access

Description

WCDMA is the radio technology of UMTS which is part of the IMT 2000 3G standard. It is a spread spectrum modulation technique supporting high-speed multimedia services such as full-motion video, mobile broadband access, and video conferencing among other bandwidth intensive applications.

Origin/Facts

W-CDMA is based on radio access technique proposed by ETSI Alpha group and the specifications was finalized in 1999. W-CDMA was developed by NTT DoCoMo as the air interface for their 3G network FOMA.

Unit

Data Rates

UMTS W-CDMA: 0.384 Mbps (Downlink), 0.384 Mbps(Uplink),(2 Mbps low range)
HSDPA+HSUPA: 14.4Mbps (Downlink), 5.76 Mbps (Uplink)
HSPA+: 42Mbps (Downlink), 11.5 Mbps (Uplink)
3.

Services Offered

New service capabilities
Increased network capacity
High bandwidth compared to GSM, GPRS, EDGE
voice, data, JAVA, video telephony, music and video downloads, wallet-phones.

Range

Frequency/Channel

850MHz, 900MHz, 1800MHz, and 1900MHz
5 MHz Carrier, Chip Rate:3.84 Mcps
Carrier Spacing:4.4 - 5.2 MHz (200 kHz carrier raster)
Frame Length: 4.4 - 5.2 MHz (200 kHz carrier raster)

Advantages/Disadvantages

Advantages:
WCDMA Supports high-speed data services W-CDMA is better suited for deployment in densely populated areas
In built security of CDMA.
Considerably reduced multi path effects.

Disadvantages:
The implementation of W-CDMA is a technical challenge because of it's complexity and versatility.

Present/Future in SAMENA

Siemens Communications has upgraded the mobile network of Saudi Arabia's Saudi Telecom with WCDMA technology
Siemens is to implement a WCDMA network infrastructure in Afghanistan for Afghan Wireless
Qatar Telecom is working with Siemens Communications to establish a 3G wireless telecommunications laboratory at the college of the North Atlantic.
With teledensity having reached 58% percent, Pakistan Telecommunication Authority (PTA) plans to complete preparatory work for the launch of the 3G technology within the next few months.

Worldwide Customers

1 Billion

 
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