Patent ID: 9031097
Filing Date: 2015-05-12
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method of transmitting data in a wireless multiple-input multiple-output (MIMO) communication system, comprising: selecting a spatial multiplexing mode to use for data transmission from among a plurality of spatial multiplexing modes supported by the system based on whether a user terminal has performed calibration so that the user terminal can estimate a channel response for a downlink based on a pilot received via an uplink, the plurality of spatial multiplexing modes comprising at least one steered spatial multiplexing mode and a non-steered spatial multiplexing mode, wherein the steered spatial multiplexing mode includes spatial processing using eigenvectors of a channel response matrix for at least one subband; coding and modulating a plurality of data streams in accordance with a plurality of rates to obtain a plurality of data symbol streams; and using the spatial multiplexing mode, processing the plurality of data symbol streams to obtain a plurality of transmit symbol streams for transmission from a plurality of antennas.