Resource allocation in relay-assisted DS/CDMA interference channels: A Stackelberg game approach

The issue of resource allocation for MSE minimization in a DS/CDMA amplify-and-forward relay-assisted interference channel is addressed in this paper. The resource allocation process is modeled as a two-level Stackelberg game, with the relay as the leader, and the multiple access users as followers. The best response dynamics for the non-cooperative game played by the followers for a given relay matrix is derived and its convergence proved. Then, computationally simpler equilibria that require very little CSI are proposed, and relay matrix design is carried out. Numerical results confirm the theoretical findings, showing the merits of the proposed resource allocation techniques.