Patent ID: 8917583
Filing Date: 2014-12-23
Classification: H04B,H04L,H04W

Abstract:
1. A wireless communications method for a base station, the method comprising: transmitting a channel sounding request to a wireless transmit/receive unit (WTRU), wherein the channel sounding request includes channel sounding instructions; receiving a predefined channel sounding response (CSR) responsive to the channel sounding request, wherein the CSR is defined in terms of a number of symbols, size and symbol amplitude; analyzing the CSR to estimate an uplink (UL) channel via measuring the amplitude and phase of subcarriers of the CSR at a plurality of antennas; determining transmit parameter settings based on the estimated UL channel including modulation and coding parameters for each of a plurality of subcarriers to be transmitted on using at least one of the plurality of antennas; adjusting transmit parameters and modulating a plurality of sub-carriers with data according to the determined transmit parameter settings; and transmitting the data using the adjusted transmit parameters and transmitting an indicator that indicates at least one of the adjusted transmit parameters.