Coexistence Strategies and Capacity Theorems of Interference Awareness Cognitive Radio

摘要

Interference awareness cognitive radio (IACR) is a special paradigm of cognitive radios, which utilizes spatial spectrum holes for frequency reuse. The primary contributions of this work are in two folds: 1) find the fundamental capacity limit of IACR with perfect channel side information; 2) find the achievable rate for the scenario, where the channel gain between the secondary transmitter and the primary receiver is not known, but the secondary transmitter has the localization information about all network nodes. Numerical results show the relationship between the channel capacity, rate penalty, outage probability, and channel gains. It is shown that the localization information can help the IACR system, but cannot offer comparable performance with the case with perfect channel side information.