Multi-user MIMO precoding with Kerdock codebook

In this paper, our aim is to use a Kerdock codebook-based precoding scheme for a multi-user MIMO broadcast channel with channel state information at the base station and limited feedback. The main reason for applying a Kerdock code in place of optimal precoding is to reduce VLSI implementation complexity. The proposed scheme exploits the scheduling and precoding methods with a view to maximizing system capacity and precanceling the multi-user interferences. Conducted simulations show that the proposed scheme provides greater system capacity enhancement than a single-user MIMO system and outperforms the Grassmannian precoding with lower complexity, a key point, by a factor of 1.45.