Joint Subcarrier and Power Allocation in OFDMA Systems for Outage Minimization


Basaran S. T. , KURT G. K.

IEEE COMMUNICATIONS LETTERS, cilt.20, ss.2007-2010, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 20 Konu: 10
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1109/lcomm.2016.2586038
  • Dergi Adı: IEEE COMMUNICATIONS LETTERS
  • Sayfa Sayıları: ss.2007-2010

Özet

The joint assignment of subcarriers and limited transmission power is addressed as a combinatorial optimization problem in orthogonal frequency division multiple access networks. To ensure fairness among users while jointly minimizing the total transmit power, the minimization of the number of outage subcarriers is considered as the objective function. The proposed scheme enables distinct rate requirement for each user. Optimal and reduced complexity algorithms, based on the application of Hungarian method to randomly weighted complete bipartite graphs, that reduce the outage probability according to the benchmark works while providing considerable power savings are proposed.