Cancelling Intermodulation Interference

A method, performed by a receiver, for cancelling intermodulation interference, the method comprising:

• receiving a digital signal sample;
• obtaining a power of the received digital signal sample;
• obtaining, based on the obtained power, at least one model value from a model, the model modelling model values of a non-linearity in amplitude and phase of a received signal that passes through passive and active components in the receiver, the model values corresponding to a plurality of powers of the received signal;
• cancelling intermodulation interference by multiplying the received digital signal sample with the obtained at least one model value, thereby obtaining an output digital signal sample from which intermodulation interference, inflicted by the receiver, is cancelled.

A receiver, comprising:

• radio frequency circuitry;
• a processor;
• memory operatively coupled to the processor and containing instructions executable by the processor to cause the receiver to:
• receive a digital signal sample;
• obtain a power of the received digital signal sample;
• obtain, based on the obtained power, at least one model value from a model, the model modelling model values of a non-linearity in amplitude and phase of a received signal that passes through passive and active components in the receiver, the model values corresponding to a plurality of powers of the received signal;
• cancel intermodulation interference by multiplying the received digital signal sample with the obtained at least one model value to thereby obtain an output digital signal sample from which intermodulation interference, inflicted by the receiver, is cancelled.

A transceiver, comprising:

• a transmitter;
• a receiver comprising:
• radio frequency circuitry;
• a processor;
• memory operatively coupled to the processor and containing instructions executable by the processor to cause the receiver to:
• receive a digital signal sample;
• obtain a power of the received digital signal sample;
• obtain, based on the obtained power, at least one model value from a model, the model modelling model values of a non-linearity in amplitude and phase of a received signal that passes through passive and active components in the receiver, the model values corresponding to a plurality of powers of the received signal;
• cancel intermodulation interference by multiplying the received digital signal sample with the obtained at least one model value to thereby obtain an output digital signal sample from which intermodulation interference, inflicted by the receiver, is cancelled.

A wireless communication node, comprising:

• a receiver comprising:
• radio frequency circuitry;
• a processor;
• memory operatively coupled to the processor and containing instructions executable by the processor to cause the receiver to:
• receive a digital signal sample;
• obtain a power of the received digital signal sample;
• obtain, based on the obtained power, at least one model value from a model, the model modelling model values of a non-linearity in amplitude and phase of a received signal that passes through passive and active components in the receiver, the model values corresponding to a plurality of powers of the received signal;
• cancel intermodulation interference by multiplying the received digital signal sample with the obtained at least one model value to thereby obtain an output digital signal sample from which intermodulation interference, inflicted by the receiver, is cancelled.

A computer program product stored in a non-transitory computer readable medium for controlling a wireless communication node, the computer program product comprising software instructions which, when run on one or processors of the wireless communication node, causes the wireless communication node to:

• receive a digital signal sample at a receiver;
• obtain a power of the received digital signal sample;
• obtain, based on the obtained power, at least one model value from a model, the model modelling model values of a non-linearity in amplitude and phase of a received signal that passes through passive and active components in the receiver, the model values corresponding to a plurality of powers of the received signal;
• cancel intermodulation interference by multiplying the received digital signal sample with the obtained at least one model value, thereby obtaining an output digital signal sample from which intermodulation interference, inflicted by the receiver, is cancelled.