Abstract:

Based on equivalent matrice and tree search, codebook-based precoding selection strategy is presented for four transmission antenna ports in the 3rd Generation Partnership Project long term evolution（3GPP LTE） system. Sixteen codebooks are equivalent to five ones, and then the best codebook is found by the tree search method. Compared with the optimal codebook selection scheme, the proposed selection strategy can reduce codebook number and computation complexity effectively. Simulation results demonstrate that the performance of the proposed strategy near to that of the optimal codebook selection scheme.

Key words: 3rd Generation Partnership Project long term evolution, multi-input multi-output, precoding, codebook