An Interference Alignment Algorithm Based on SLNR for MIMO Interfering Broadcast Channel

Abstract

Abstract. Aiming at the problem that the existing EUG IA algorithm does not have antinoise performance, this paper proposes an interference alignment algorithm based on SLNR. The algorithm uses a hierarchical design idea. The outer layer first uses the extended grouping strategy to group the cells and users, and solves the outer precoding matrix and the interference suppression matrix to eliminate the inter-cell interference, so as to transform the multi-cell multi-user interference cancellation into single-cell multi-user interference cancellation problem. The inner layer uses the Max-SLNR criterion to iterate to solve the single-cell precoding matrix and the interference suppression matrix to eliminate inter-user interference. The simulation results show that the proposed algorithm has better performance and anti-noise performance than the original algorithm.