Energy-Efficient Spectrum Sensing for Cognitive Radio Networks Conference Paper uri icon


  • This paper focuses on the spectrum sensing issues in the unslotted cognitive radio networks with wireless fading channels. To overcome the energy-inefficiency problem of the existing continuous/fixed-schedule spectrum sensing schemes in the cognitive radio networks, we propose an efficient spectrum sensing scheme for secondary users (SUs). The design goal of our proposed scheme is to save the sensing energy consumption while guaranteeing the priority of the primary users (PUs) and the spectrum opportunity for SUs in terms of available spectrum usage time. In particular, our proposed energy-efficient spectrum sensing scheme adaptively adjusts the spectrum sensing periods and determines between the presence and vacancy of the PU by taking advantage of PU's activity patterns. We also develop a novel two-threshold based sequential sensing policy to reduce the false alarm probability while limiting the missed detection probability. We conduct simulations to validate and evaluate our proposed scheme. 2010 IEEE.

name of conference

  • 2010 IEEE International Conference on Communications

published proceedings


author list (cited authors)

  • Su, H., & Zhang, X. i.

citation count

  • 23

complete list of authors

  • Su, Hang||Zhang, Xi

publication date

  • May 2010