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Bit and Power Allocation for Goodput Optimization in Coded OFDM Systems

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2 Author(s)
Devillers, B. ; Lab. of Commun. & Remote Sensing, Univ. Catholique de Louvain ; Vandendorpe, L.

We focus on resource allocation in a coded orthogonal frequency division multiplexing system. A frame-oriented transmission with convolutional coding and Viterbi decoding is considered. We suppose that only error-free frames are kept by the receiver, other frames are thrown away and have to be retransmitted. As a consequence, the only meaningful criterion for evaluating the performance of such a system is the error-free rate, or goodput. This criterion is a good compromise between the rate and bit error probability criterions. We here present a formulation for the goodput of the system and propose a bit and power allocation algorithm maximizing it. The proposed algorithm is then compared with other existing resource allocation strategies. Simulation results show that the proposed algorithm significantly improves the performance

Published in:

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on  (Volume:4 )

Date of Conference:

14-19 May 2006