| CPC H04B 1/1036 (2013.01) [H04L 5/14 (2013.01)] | 17 Claims |
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1. A method comprising:
transmitting a transmit signal from a transmit path of a full-duplex radio transceiver;
receiving a receive signal at a receive path of the transceiver, the receive signal including a self-interference signal component caused by self-interference between the transmit path and the receive path, the self-interference to be cancelled;
generating a filtered signal by filtering an initial signal from the transmit path according to one or more coefficients which define a transfer function of an adaptive filter, the adaptive filter being configured based on a target signal derived from the receive signal, the filtered signal being an estimate of the self-interference in the received signal in the receive path, wherein the initial signal is a copy of the transmit signal; and
subtracting a cancellation signal from the receive signal, the cancellation signal being defined by the filtered signal and the cancellation signal being subtracted from the received signal in the receive path using a combiner in order to remove the self-interference and obtain a signal of interest;
wherein the target signal is derived from the receive signal by estimating the self-interference signal component in the receive signal based on the receive signal and the cancellation signal is the filtered signal, or wherein the target signal is a part of the receive signal and the cancellation signal is derived from the filtered signal by estimating a part of the filtered signal based on the filtered signal, the part of the filtered signal being equal to the self-interference signal component.
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