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Energy Minimization in OFDMA Downlink Systems: A Sequential Linear Assignment Algorithm for Resource Allocation

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4 Author(s)
Jingon Joung ; Inst. for Infocomm Res. (I2R), A*STAR, Singapore, Singapore ; Chin Keong Ho ; Peng Hui Tan ; Sumei Sun

We propose a sequential linear assignment algorithm (SLAA) for resource allocation of OFDMA systems consisting of M users and N (N >; M) resource blocks, with the aim of achieving near optimal energy consumption with polynomial complexity. The proposed SLAA allocates subchannels through a linear assignment algorithm (LAA), sequentially; thus, it requires O(MN2(N - M)2) complexity. From numerical results, the required power from the proposed assignment is observed to be within around 0.4 % of the lower bound of minimum possible power required to achieve the same target rates.

Published in:

Wireless Communications Letters, IEEE  (Volume:1 ,  Issue: 4 )