Patent ID: 8244190
Filing Date: 2012-08-14
Classification: H04B

Abstract:
1. A wireless relay node comprising: a receiving side and a transmitting side for concurrent reception and transmission of an information stream, both said receiving side and said transmitting side having multiple antennas, where said receiving side is configured to receive a Multiple Input Multiple Output (MIMO) signal representative of said information stream, said received MIMO signal having multiple MIMO sub-streams; and a self-interference cancellation module configured to cancel signal feedback from a multi-antenna dependent feedback channel from said transmitting side to said receiving side based on a N×M dimensional filter matrix dependent on said multi-antenna dependent feedback channel, where at least one of N and M is greater than 1, where said multi-antenna dependent feedback channel is represented by a N where said filter matrix is implemented in a filter arranged in an internal feedback path in connection with a forward path between said receiving side and said transmitting side of said relay node, where said relay node further comprises a signal processing module comprising at least one antenna weight matrix arranged in said forward path, and values of said N×M dimensional filter matrix are modified by a transfer function of said at least one antenna weight matrix, and where said signal processing module is configured to process said received MIMO signal such that the number of MIMO sub-streams of the processed signal for transmission at the transmitting side is at least greater than 1.