subject: A Glance At Wideband Code Division Multiple Access [print this page] WCDMA is one of the standards used for air interface which is offered by mobile telecommunications networks that provide 3G services to their clients and consumers. To attain faster speed, it uses the frequency duplex division method as well as a direct sequence spread spectrum channel. To learn more about it, lit is best that we have a closer glance at the history of its development as well as its technical features and deployment.
The Development of WCDMA
NTT Docomo created the Wideband Code Division Multiple Access to improve the features of its 3G network in the late part of the 1990s. The International Telecommunication Union received a proposal from the firm concerning the standard specification of W-CDMA. After several years, the union accepted the proposal. In addition, it added the standard in the IMT-2000 air interface standard. Moreover, it acted as a substitute to another standard known as the CDMA 2000.
The delay in the launch of this standard was due to several factors such as the expensive cost of its use with any 3G system as well as its incompatibility with other standards. Despite the delay in its deployment, it has been adopted in more than 50 countries in the world, which include Japan and the Philippines.
Technical Features
Wideband Code Division Multiple Access is popular for its key technical features. They include the addition of radio channels that work with 5 megahertz width. In addition, it is also known for being capable of multi-code transmission. Moreover, the device is useful for inter-cell asynchronous processes. Its power control was developed using Signal-to-Interference Ratio. Furthermore, this standard has several kinds of handoff, which include the hard handoff and the soft handoff. Above all, it features smart antennas that are helpful in improving coverage and capacity.
Additional Information and Other Important Details about WCDMA
This third-generation wireless standard enables consumers to use data transfer and voice services at the same time. This standard is advance in the sense that it has the capacity to transfer data with a maximum speed of 384 kilobytes per second. This device is widely used in some regions of the world including Asia and Europe. Due to its key functions and technical features, the number of demands in some countries such as the U.S. has increased dramatically from the late 1990s to the early part of the 2000s.
