A Generic Interference Model for Uplink OFDMA Networks With Fractional Frequency Reuse


Tabassum H., Dawy Z., Alouini M. S. , Yilmaz F.

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, cilt.63, ss.1491-1497, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 63 Konu: 3
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1109/tvt.2013.2284337
  • Dergi Adı: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
  • Sayfa Sayıları: ss.1491-1497

Özet

Fractional frequency reuse (FFR) has emerged as a viable solution to coordinate and mitigate cochannel interference (CCI) in orthogonal frequency-division multiple-access (OFDMA)-based wireless cellular networks. The incurred CCI in cellular networks with FFR is highly uncertain and varies as a function of various design parameters that include the user scheduling schemes, the transmit power distribution among multiple allocated subcarriers, the partitioning of the cellular region into cell-edge and cell-center zones, the allocation of spectrum within each zone, and the channel reuse factors. To this end, this paper derives a generic analytical model for uplink CCI in multicarrier OFDMA networks with FFR. The derived expressions capture several network design parameters and are applicable to any composite fading-channel models. The accuracy of the derivations is verified via Monte Carlo simulations. Moreover, their usefulness is demonstrated by obtaining closed-form expressions for the Rayleigh fading-channel model and by evaluating important network performance metrics such as ergodic capacity. Numerical results provide useful system design guidelines and highlight the trade-offs associated with the deployment of FFR schemes in OFDMA-based networks.