Radio engineering from software radio to cognitive radio

However, even with software-defined radio SDR , it will be possible to offer a CR with limited features. The outburst in sales of mobile phones and increase in the volume of data transmission particularly on the Internet show that not only the users but also the operators have growing needs for anywhere, anytime communications.

A significant geographic mobility leads to strict constraints on the terminals see Figure 6. The terminals, based on their localization, must be able to connect to networks having different standards. Introduction Starting from software-defined radio SDR architecture, this chapter deals with the receiver radio frequency RF or analog front end. Antennas 7. Introduction To analyze the electromagnetic environment and adapt its operation, the cognitive radio CR system is brought to discriminate the radio signals spectrally and spatially.

Get it now. Online Available online. Wiley Online Library Full view. Report a connection problem. More options. Find it at other libraries via WorldCat Limited preview. Contributor Palicot, Jacques. Bibliography Includes bibliographical references and index. Summary Software radio ideally provides the opportunity to communicate with any radio communication standard by modifying only the software, without any modification to hardware components.

He noticed that the spectrum was very inefficiently used and a large part of it was underutilized. He concluded that by locally managing the spectrum intelligently, its use could be significantly increased. Mitola realized the need to put intelligence simultaneously into both the network and the equipment, to satisfy both the user needs and resource constraints, ultimately resulting in an increase in spectral efficiency.