Analysis of mobility impact on interference in cognitive radio networks

Ali Riza Ekti, Serhan Yarkan, Khalid A. Qaraqe, Erchin Serpedin, Octavia A. Dobre

Research output: Contribution to journalArticle

1 Citation (Scopus)


Cognitive radio (CR) technology seems to be a promising candidate for solving the radio frequency (RF) spectrum occupancy problem. CRs strive to utilize the white holes in the RF spectrum in an opportunistic manner. Because interference is an inherent and a very critical design parameter for all sorts of wireless communication systems, many of the recently emerging wireless technologies prefer smaller size coverage with reduced transmit power in order to decrease interference. Prominent examples of short-range communication systems trying to achieve low interference power levels are CR relays in CR networks and femtocells in next generation wireless networks (NGWNs). It is clear that a comprehensive interference model including mobility is essential especially in elaborating the performance of such short-range communication scenarios. Therefore, in this study, a physical layer interference model in a mobile radio communication environment is investigated by taking into account all of the basic propagation mechanisms such as large- and small-scale fading under a generic single primary user (PU) and single secondary user (SU) scenario. Both one-dimensional (1D) and two-dimensional (2D) random walk models are incorporated into the physical layer signal model. The analysis and corresponding numerical results are given along with the relevant discussions.

Original languageEnglish
Pages (from-to)212-222
Number of pages11
JournalPhysical Communication
Publication statusPublished - Dec 2013



  • Fading
  • Femtocell
  • Interference
  • Mobility
  • Shadowing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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