WIDEBAND CODE DIVISION MULTIPLE ACCESS

ABSTRACT

The paper introduces the concept of Wideband CDMA Radio Access Network, discussing the evolution of WCDMA from existing GSM technology and how the advantages of CDMA technology are unleashed in WCDMA. One of the key benefits of the technology is efficient, flexible support for radio bearers, in which network capacity can be freely allocated between voice and data within the same carrier. For optimal operation of a complete wireless system i.e. from handset to radio access network (RAN) several functions are needed to control the radio network and the many handsets using it. All functions are described in this presentation WCDMA has gained broad acceptance within the wireless communication industry, and is rapidly emerging as the leading global third-generation standard. Some other distinguishing features include:
1. WCDMA can support mobile/portable voice, images, data, and video communications at up to 2 Mbps (local area access) or 384 Kbps (wide area access).
2. The input signals are digitized and transmitted in coded, spread-spectrum mode over a broad range of frequencies. A 5 MHz-wide carrier is used, compared with 200 KHz-wide carrier for narrowband CDMA.