Conference and workshop papers

Title of the paper	On Power Allocation in Adaptive Cyclic Prefix OFDM
Author(s)	Salvatore D’Alessandro, Andrea M. Tonello and Lutz Lampe
Location	Rio de Janeiro, Brazil
Date	28 - 31. March 2010
Link to Eventpage	IEEE ISPLC 2010 - International Symposium on Power Line Communications and Its Applications
Abstract	We consider the problem of the joint allocation of power and cyclic prefix (CP) duration to maximize the system capacity in orthogonal frequency division multiplexing (OFDM). A closed form solution to the problem does not exist and the exhaustive search of the optimal values is practically unfeasible. Therefore, we propose a sub-optimal iterative power allocation algorithm jointly with the CP adaptation to see whether capacity improvements can be obtained w.r.t. the conventional choice of a uniform power distribution over the sub-channels and a predetermined long CP value. Numerical results show that via power and CP adaptation significant improvements can be obtained.

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