Data Acquisition Web

Wireless development is being driven by the transformation of a medium for supporting voice telephony into a medium for supporting other services, such as the transmission of video, images, text, and data. Similar to developments in wireline capacity in the 1990s, the demand for new wireless capacity is growing at a very rapid pace.

Of course, still many technical problems has to been solved in wireline communications, but demands for additional capacity can be fulfilled with the addition of new private infrastructure, such as additional optical fiber, routers, switches, and so on.

The traditional resources that have been used to add capacity to wireless systems are radio bandwidth and transmitter power. Unfortunately, these resources are among the most severely limited: radio bandwidth because of the very tight situation regard to useful radio spectrum, and transmitter power because mobile and portable services use limited battery power.

These two resources are not growing or improving at rates that can support demand for wireless capacity. One resource that is growing at a very rapid rate is processing power. Considerable research effort has been aimed at developing of new wireless capacity through greater intelligence in wireless networks. Novel signal transmission techniques and advanced receiver signal processing methods allow for significant increases in wireless capacity without attendant increases in bandwidth or power requirements.

The number of cellular telephony subscriptions worldwide has now surpassed the number of wireline telephony subscriptions. These numbers make cellular telephony a very important driver of wireless development, and the push to develop new mobile data services go collectively under the name third-generation, (3G) cellular.