Interference mitigation using spectrum sensing and dynamic frequency hopping

Mohammad J.Abdel Rahman, Marwan Krunz, Richard Erwin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations


Wireless communications are prone to both unintentional and intentional RF interference. Such interference has significant impact on the reliability of packet transmissions. In this paper, we consider interference mitigation in frequency hopping (FH) systems. We employ cognitive radios (CRs) for proactive interference sensing in such systems. Through this proactive approach, we propose a scheme for dynamic adjustment of the FH sequence. Our protocol, called SSDFH, relies on exploiting the spectrum sensing capabilities of CRs for proactive detection of channel quality. We analyze the characteristics of the proposed SSDFH using a continuous-time Markov chain framework. Level crossing rate (LCR) analysis is used to determine the transition rates for the Markov chain, which are then used to measure the 'channel stability,' a metric that reflects the freshness of sensed channel interference. The selection of different protocol parameters is studied by means of analysis. In particular, we provide a numerical procedure for determining the 'optimal' total sensing time that minimizes the probability of 'black holes.' We run simulations to study the performance of our proposed protocol.

Original languageEnglish (US)
Title of host publication2012 IEEE International Conference on Communications, ICC 2012
Number of pages5
StatePublished - 2012
Event2012 IEEE International Conference on Communications, ICC 2012 - Ottawa, ON, Canada
Duration: Jun 10 2012Jun 15 2012

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607


Other2012 IEEE International Conference on Communications, ICC 2012
CityOttawa, ON


  • Spectrum sensing
  • cognitive radio
  • continuous-time Markov chains
  • dynamic frequency hopping

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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