On Partially Overlapping Coexistence for Dynamic Spectrum Access in Cognitive

Ebrahim Bedeer Mohamed, Mohammed Marey, Octavia A. Dobre, Kareem E. Baddour

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)
12 Downloads (Pure)

Abstract

In this paper, we study partially overlapping coexistence scenarios in cognitive radio environment. We consider an Orthogonal Frequency Division Multiplexing (OFDM) cognitive system coexisting with a narrow-band (NB) and an OFDM primary system, respectively. We focus on finding the minimum frequency separation between the coexisting systems to meet a certain target BER. Windowing and nulling are used as simple techniques to reduce the OFDM out-of-band radiations, and, hence decrease the separation. The effect of these techniques on the OFDM spectral efficiency and PAPR is also studied.

Keywords

  • Bit error rate
  • Interference
  • Cognitive radio
  • spectrum access
  • Coexistence

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