METHODS FOR REDUCING COMPLEXITY OF PRE-CODING MATRIX COMPUTATION AND GROUPING OF USER EQUIPMENTS IN MASSIVE MIMO SYSTEMS

摘要

This invention presents methods for using spatial FFT to reduce the number of computations for generating the pre-coding matrix in a MIMO system comprising reducing the dimension of channel vectors by neglecting entries whose values are significantly smaller or near zero, and to select UEs into a group assigned to the same time and frequency resources.