Optimum cognitive radio transmission scheme for reducing average interference power
Sang Joon Kim, Saeed S. Ghassemzadeh, Robert R. Miller, Vahid Tarokh · 2011
Reducing interference induced by secondary users is one of the most challenging problems in spectrum sharing. In this paper, we derive the optimum transmission strategy that minimizes the average interference power created by cognitive radios at a given point of space i.e. the location of a primary receiver. Surprisingly, this is not given by the water-filling solution.