Skip to content


  • Research Article
  • Open Access

Flexible Radio: A Framework for Optimized Multimodal Operation via Dynamic Signal Design

  • 1Email author,
  • 1,
  • 1,
  • 1 and
  • 1
EURASIP Journal on Wireless Communications and Networking20052005:850819

  • Received: 16 March 2005
  • Published:


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.


  • flexible radio
  • reconfigurable transceivers
  • adaptivity
  • MIMO
  • OFDM

Authors’ Affiliations

Institute of Accelerating Systems & Applications (IASA), National Kapodistrian University of Athens (NKUA), P.O. Box 17214, Athens, 10024, Greece