Patent ID: 8837615
Filing Date: 2014-09-16
Classification: H04B,H04L

Abstract:
1. A method in a relay for receiving an OFDM signal and forwarding the received OFDM signal comprising OFDM symbols of a wireless OFDM communication network including self-interference cancelling circuitry, wherein each received OFDM symbol to be forwarded is prefixed with a cyclic prefix, CP, being a copy of a part of the OFDM symbol, comprising the steps of: determining a delay for delaying an interference generating feedback signal such that an OFDM symbol of the interference generating feedback signal overlaps within a fraction of a length of the CP with an OFDM symbol of the received OFDM signal, the interference generating feedback signal including one or both of a self-interfering signal or a self-interference cancellation signal, wherein the fraction of the length of the CP is less than a whole length of the CP; and delaying the interference generating feedback signal with the determined delay.