Exact Capacity Analysis of Spectrum Sharing Systems: Average Received-Power Constraint

  title={Exact Capacity Analysis of Spectrum Sharing Systems: Average Received-Power Constraint},
  author={Gosan Noh and Sungmook Lim and Daesik Hong},
  journal={IEEE Communications Letters},
This letter presents an exact closed-form expression for the ergodic capacity of the secondary user in a spectrum sharing environment under an average received-power constraint, considering the effect of the interference from the primary user. Using capacity maximizing water-filling power allocation, we provide the closed-form expressions for the ergodic capacity and the average received-power assuming Rayleigh fading channels. Numerical results show that the primary user interference… CONTINUE READING

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