Patent ID: 8625631
Filing Date: 2014-01-07
Classification: H04L,H04W

Abstract:
1. A method for training in the downlink of a wireless communication network having a topology of cells using a coordinated reuse of pilots codes across the topology, each cell containing a base station, the method performed by each base station comprising: receiving, at the base station having at least a processor and a memory therein, an assignment of a subset of codes from a set of pilot codes; assigning codes in each subset of codes to user terminals in said each cell based on cell dependent criteria, the pilot codes being reused across the topology of cells by using the cell-dependent criteria in assigning the pilot codes to the user terminals within each cell; receiving waveforms from user terminals transmitting their assigned pilots; obtaining channel estimate information for channels between base station antennas and user terminals to which the base station is transmitting, the channel estimates based on the received waveforms; and transmitting precoded information to user terminals based on the channel estimate information.