US 9,178,595 B2 · Method for indicating precoding matrix indicator in uplink MIMO system with based on SC-FDMA

Abstract

A method of transmitting PMI (precoding matrix indicator) information in an uplink MIMO system is disclosed. The present invention includes the steps of receiving channel information from a user equipment and transmitting information on a resource allocated to the user equipment in uplink transmission and PMI information indicating a precoding matrix to apply to a region of the resource among a plurality of precoding matrices to the user equipment based on the received channel information, wherein the resource allocated to the user equipment is allocated by a bundle unit of a prescribed number of subcarriers, wherein each of a plurality of the precoding matrices are applied to regions generated from dividing a whole frequency band into a prescribed number of regions, respectively, and wherein the precoding matrix applied to the resource among a plurality of the precoding matrices has a maximum area resulting from overlapping a frequency band occupied by the allocated resource with a frequency band having the precoding matrix applied thereto.

Claims4

Dependent claims

A method of receiving a physical uplink shared channel (PUSCH) signal, the method comprising:

transmitting a first physical downlink control channel (PDCCH) signal including first precoding matrix indicator (PMI) information for a first set of PMIs related to specific rank to a user equipment;
transmitting a physical downlink shared channel (PDSCH) signal including second PMI information for a second set of PMIs to the user equipment, each of the first and second sets of PMIs corresponding to a respective subband of overall subbands;
transmitting a second PDCCH signal including uplink (UL) grant information for the PUSCH to the user equipment;
and
receiving the PUSCH signal including one or more clusters from the user equipment, each of the one or more clusters being precoded with a precoding matrix corresponding to a respective PMI after a discrete Fourier transform processing at the user equipment,
wherein, for a cluster that overlaps with plural subbands, the respective PMI is selected so that an overlapping region in a frequency domain is maximized between a corresponding subband and the cluster.

3 more elements

Dependencies are inferred from the claim text.

Method for indicating precoding matrix indicator in uplink MIMO system with based on SC-FDMA

Life of this patent

Method for indicating precoding matrix indicator in uplink MIMO system with based on SC-FDMA

Life of this patent

Abstract

Claims4