Downlink capacity of OFDMA-CR based 5G femtocell networks

Joydev Ghosh, Dushantha Nalin K. Jayakody, Marwa Qaraqe

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


This research work explores small cell densification as a key technique for next generation wireless network (NGWN). Small cell densification comprises space (i.e, dense deployment of femtocells) and spectrum (i.e., utilization of frequency band at large). The usage of femtocells not only improves the spectral efficiency (SE) of the Heterogeneous two-tier networks against conventional approach, but also it alleviates outage probability and enhances the achievable capacity. We yield an analytical framework to establish the density of the femto base station (FBS) to a monotonically increasing or decreasing function of distance or radius, respectively. This ensures the enhanced performance in spectrum sharing Orthogonal Frequency Division Multiple Access (OFDMA) femtocell network models. We also illustrate the influence of active Femto users (i.e., users in femtocells, and they are usually low mobility and located closer to the cell center with less fading), cluster size (i.e., a group of adjacent macrocells which use all of the systems frequency assignments) via simulation results.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalPhysical Communication
Publication statusPublished - 1 Aug 2018


  • Cognitive radio (CR) technology
  • Downlink (DL) capacity
  • Femtocell
  • Macrocell
  • Orthogonal Frequency Division Multiple Access (OFDMA)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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