Flexible radio: a framework for optimized multimodal operation via dynamic signal design

Authors:
Ioannis Dagres;Andreas Zalonis;Nikos Dimitriou;Konstantinos Nikitopoulos;Andreas Polydoros
Affiliations:
Institute of Accelerating Systems & Applications (IASA), National Kapodistrian University of Athens (NKUA), Athens, Greece;Institute of Accelerating Systems & Applications (IASA), National Kapodistrian University of Athens (NKUA), Athens, Greece;Institute of Accelerating Systems & Applications (IASA), National Kapodistrian University of Athens (NKUA), Athens, Greece;Institute of Accelerating Systems & Applications (IASA), National Kapodistrian University of Athens (NKUA), Athens, Greece;Institute of Accelerating Systems & Applications (IASA), National Kapodistrian University of Athens (NKUA), Athens, Greece
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2005

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Abstract

The increasing need for multimodal terminals that adjust their configuration on the fly in order to meet the required quality of service (QoS), under various channel/system scenarios, creates the need for flexible architectures that are capable of performing such actions. The paper focuses on the concept of flexible/reconfigurable radio systems and especially on the elements of flexibility residing in the PHYsical layer (PHY). It introduces the various ways in which a reconfigurable transceiver can be used to provide multistandard capabilities, channel adaptivity, and user/service personalization. It describes specific tools developed within two IST projects aiming at such flexible transceiver architectures. Finally, a specific example of a mode-selection algorithmic architecture is presented which incorporates all the proposed tools and, therefore, illustrates a baseband flexibility mechanism.