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Game-theoretic opportunistic spectrum sharing strategy selection for cognitive MIMO multiple access channels

<04> This work is pioneering in applying game theoretic analysis to opportunistic spectrum sharing strategy selection for cognitive MIMO multiple access channels. It considers limited feedback under constraints of interference power and transmission stream. The paper proposes a game-theoretic model for the precoding strategy selection behaviours of the secondary users. The paper analyses the feasibility and optimality of Nash equilibrium games, and further designs an iterative precoding strategy selection algorithm based on the best response rule to attain a feasible Nash equilibrium. Simulation results show that the designed algorithms can achieve optimal or near optimal sum rate performance with low complexity.