Patent ID: 9148244
Filing Date: 2015-09-29
Classification: H04B,H04J

Abstract:
1. A method performed in a radio network node of a wireless network to adaptively cancel an external interference, the method comprising: receiving an external interference report from a wireless terminal of an external interference experienced by the wireless terminal, the wireless terminal being paired with the radio network node; determining an interference subspace of the wireless terminal based on the external interference report, the interference subspace being a signal subspace that contains the external interference of the wireless terminal; projecting a transmit signal of an original transmission subspace entirely onto a desired signal subspace of the wireless terminal based on the interference subspace, wherein the desired signal subspace is orthogonal to the interference subspace; and transmitting the transmit signal to the wireless terminal projected onto the desired signal subspace, wherein the original transmission subspace corresponds to an original transmit stream set comprising a plurality of original transmit streams, wherein the desired signal subspace corresponds to a projected stream set comprising one or more projected transmit streams, and wherein a number of the projected streams in the projected stream set is less than a number of the original transmit streams in the original transmit stream set.