AG Kommunikationstheorie

Thema:

Heuristics for Resource Allocation in Multiuser OFDM

Abstract:

It has been shown that adaptive power and rate allocation for multiuser orthogonal frequency multiplexing (OFDM) improves the system performance significantly. In this talk, the resource allocation that aims at minimizing the total transmission power under certain data transmission constraints is considered. First, the power variation for single-user water-filling while changing the subcarrier assignment is derived. Based on this, a class of methods for multiuser resource allocation is proposed. Further, these methods can be extended for other resource allocation problems in multiuser OFDM. Compared to previous works, simulations show that our methods have comparable or better performance and that the computing time for the proposed methods is approximately linearly or even sublinearly increasing in the number of users and the number of subcarriers.



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