W CDMA ( Wideband Code Division Multiple Access ) is a radio interface technology using wideband code division multiple access using two 5 MHz wide radio frequency bands. The term W-CDMA ( 3GPP Release 4) is also used to describe an independent cellular network standard, was designed as an add-on on GSM and works in the range of 1900-2100 MHz.
WCDMA has been selected by most cellular operators to provide broadband radio access in order to support 3G services.
The technology is optimized to provide high-speed multimedia services such as video, Internet access and video conferencing ; provides access speeds up to 2 Mbps at short distances and 384 Kbps at large with full mobility. These data rates require a wide frequency band, so the WCDMA bandwidth is 5 MHz.
The technology can be added to existing GSM and PDC networks, which makes the WCDMA standard the most promising in terms of the use of network resources and global compatibility.
Literature
- Nevdyaev L.M. Mobile communication of the 3rd generation. Series of publications "Communication and Business", M., 2000 - 208 p. ISBN 5-93184-006-0