Permutation trellis coded multi-level FSK signaling to mitigate primary user interference in cognitive radio networks

Raghed El-Bardan, Engin Masazade, Onur Ozdemir, Yunghsiang S. Han, Pramod Kumar Varshney

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

In this paper, we propose a novel spectrum underlay approach for secondary users where a permutation trellis code (PTC) is employed in conjunction with multi-level frequency shift keying signaling in the presence of multiple narrowband primary users (PUs). The PUs are assumed to be dynamic in that they appear intermittently and stay active for an unknown duration. Our proposed approach derives its resilience to the interference caused by PUs and noise disturbances via dispersal of the information in SU's messages over multiple frequencies and time intervals. Our proposed underlay-design improves the SU data rate by accumulating a large amount of spectrum from several PUs, while simultaneously operating at low power to minimize the interference caused at PUs' receivers. We evaluate our system performance in terms of bit error rate (BER) and throughput by approximating the actual BER using properties of the Viterbi decoder. We corroborate our analytical results with simulation results and show that our proposed coded system is robust to heavy interference caused by multiple narrowband PUs.

Original languageEnglish (US)
Article number7342915
Pages (from-to)104-116
Number of pages13
JournalIEEE Transactions on Communications
Volume64
Issue number1
DOIs
StatePublished - Jan 1 2016

Keywords

  • Cognitive radio networks
  • Permutation trellis codes
  • Primary user interference

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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