CODEBOOK SELECTION AND MODULATION METHOD FOR OVERCOMING WEAK SCATTERING IN MULTIPLE INPUT MULTIPLE OUTPUT-ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (MIMO-OFDM) SYSTEM

摘要

The present invention provides a precoding codebook selection and rotation modulation joint design method based on a Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system. The method diffuses and distributes transmitted data onto different components through rotation modulation, leads the data of the different components to realize independent fading on respective channels so as to increase the advantage of signal space diversity, and further selects the optimal rotation angle to obtain the maximum lift of the performance; and simultaneously introduces MIMO space diversity, time diversity and OFDM frequency diversity, as well as time-frequency interleaving diversity, thereby realizing gain caused by joint coding modulation diversity and effectively improving the performance of the system.