Patent ID: 9344178
Filing Date: 2016-05-17
CPC Classification: H04B,H04W

Claim Text:
1. A method of communication of an uplink signal from a second terminal to a base station, comprising: eavesdropping, by the second terminal, on a beamformed wireless signal transmitted from the base station to a first terminal, wherein the eavesdropping comprises receiving the beamformed wireless signal over multiple receive antennas; measuring, by the second terminal, a joint signal quality indicator based on the beamformed wireless signal, wherein the joint signal quality indicator includes an estimate of a product of the beamformed wireless signal and a channel between the base station and the second terminal; estimating, by the second terminal, uplink channel information based on the joint signal quality indicator by performing a singular value decomposition on the estimate of the product of the beamformed wireless signal and the channel between the base station and the second terminal; and transmitting, by the second terminal, the uplink signal to the base station, wherein the uplink signal is based on the uplink channel information.