Systems and methods for directing a beam towards a device in the presence of interference based on reciprocity

摘要

Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received at a receiving device. The received beam is affected by an interference signal from an interfering source. The receiving device computes a covariance matrix that represents a channel estimate associated with the interfering source. The receiving device modifies a predetermined sounding signal based on the covariance matrix for transmission to the transmission source. The receiving device causes the transmission source to estimate an equivalent channel matrix based on the predetermined sounding signal and the modified predetermined sounding signal. The equivalent channel matrix represents the channel estimate associated with the interfering source and a channel estimate associated with the transmission source.

主权项

1. A method comprising:
determining, at a receiving device, a precoding matrix associated with an interference signal that affects a beam received by the receiving device from a transmission source over a forward channel, wherein the determining is based on computing a covariance matrix for the forward channel, and the computing is based on a forward channel estimate associated with the interference signal; transmitting, by the receiving device to the transmission source over a backward channel having a reciprocal relationship with the forward channel, a modified version of a predetermined sounding signal, the modified version of the predetermined sounding signal based on the precoding matrix; and causing the transmission source to estimate an equivalent channel matrix based on (i) the predetermined sounding signal and (ii) the modified version of the predetermined sounding signal.