Spectrum sharing networks with imperfect channel state information

  title={Spectrum sharing networks with imperfect channel state information},
  author={Sumit Kundu and Binod Prasad and Sanjay Dhar Roy},
  journal={Proceedings of the 2015 Third International Conference on Computer, Communication, Control and Information Technology (C3IT)},
Cognitive Radio (CR) systems utilizes the underutilized spectrum in two ways i.e. overlay and underlay mode. In overlay CR, a secondary user (SU) opportunistically access primary user's spectrum when it is unused as decided based on spectrum sensing. In contrast, a SU in underlay CR system accesses the spectrum at any time as long as the interfering power received at a primary receiver is below a certain limit. For use in underlay a SU needs to control its transmit power based on channel state… CONTINUE READING
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