tailieunhanh - Báo cáo hóa học: " Flexible Radio: A Framework for Optimized Multimodal Operation via Dynamic Signal Design"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Flexible Radio: A Framework for Optimized Multimodal Operation via Dynamic Signal Design | EURASIP Journal on Wireless Communications and Networking 2005 3 284-297 2005 Ioannis Dagres et al. Flexible Radio A Framework for Optimized Multimodal Operation via Dynamic Signal Design Ioannis Dagres Institute of Accelerating Systems Applications IASA National Kapodistrian University of Athens NKUA . Box 17214 10024 Athens Greece Email jdagres@ Andreas Zalonis Institute of Accelerating Systems Applications IASA National Kapodistrian University of Athens NKUA . Box 17214 10024 Athens Greece Email azalonis@ Nikos Dimitriou Institute of Accelerating Systems Applications IASA National Kapodistrian University of Athens NKUA . Box 17214 10024 Athens Greece Email nikodim@ Konstantinos Nikitopoulos Institute of Accelerating Systems Applications IASA National Kapodistrian University of Athens NKUA . Box 17214 10024 Athens Greece Email cnikit@ Andreas Polydoros Institute of Accelerating Systems Applications IASA National Kapodistrian University of Athens NKUA . Box 17214 10024 Athens Greece Email polydoros@ Received 16 March 2005 Revised 19 April 2005 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 .

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