RT Conference Proceedings
T1 Resource allocation in rate-limited OFDMA Systems: 												A hybrid heuristic approach
A1 Del Ser, Javier
A1 Bilbao, Miren Nekane
A1 Gil-Lopez, Sergio
A1 Matinmikko, Marja
A1 Salcedo-Sanz, Sancho
AB This paper presents a novel resource allocation procedure for OFDMA downlinks, which stems from an hybridization of the Harmony Search and the Differential Evolution heuristic algorithms. In this setup it is known that optimum subcarrier and power allocation is achieved through 1) assigning each subcarrier to the user with highest channel gain at the given frequency, and 2) a Water-Filling procedure over the set of considered channel gains. This work addresses the scenario where stringent rate constraints are imposed for each user at the transmitter, scenario where the previous optimum resource allocation procedure no longer holds. The proposed iterative technique hinges on the aforementioned combinatorial heuristics, jointly with an iterative greedy subcarrier shifting procedure that accounts for the fulfillment of the established rate restrictions. Preliminary simulation results are provided for the extended vehicular ITU channel model, which shed light on the performance of the proposed allocation procedure.
SN 9781612840741
YR 2011
FD 2011
LK https://hdl.handle.net/11556/2672
UL https://hdl.handle.net/11556/2672
LA eng
NO Del Ser , J , Bilbao , M N , Gil-Lopez , S , Matinmikko , M & Salcedo-Sanz , S 2011 , Resource allocation in rate-limited OFDMA Systems : A hybrid heuristic approach . in 2011 International ITG Workshop on Smart Antennas, WSA 2011 . , 5741947 , 2011 International ITG Workshop on Smart Antennas, WSA 2011 , 2011 International ITG Workshop on Smart Antennas, WSA 2011 , Aachen , Germany , 24/02/11 . https://doi.org/10.1109/WSA.2011.5741947
NO conference
DS TECNALIA Publications
RD 28 jul 2024