Mobile communication system

A method comprising:

• obtaining time domain samples of a received radio frequency signal of a mobile communication system, wherein the radio frequency signal comprises a Physical Random Access Channel;
• determining an estimated power distribution for the time domain samples;
• determining a filtering threshold value at which a time domain sample is deemed to be due to interference, based on a defined probability level of the estimated power distribution;
• defining a filtering mask based on the time domain samples and the filtering threshold;
• and
• applying the filtering mask to the time domain samples to generate a filtered signal samples, wherein the filtering mask is configured to attenuate time domain samples that are above the filtering threshold.

A computer program comprising instructions for causing an apparatus to perform at least the following:

• obtaining time domain samples of a received radio frequency signal of a mobile communication system, wherein the radio frequency signal comprises a Physical Random Access Channel;
• determining an estimated power distribution for the time domain samples;
• determining a filtering threshold value at which a time domain sample is deemed to be due to interference, based on a defined probability level of the estimated power distribution;
• defining a filtering mask based on the time domain samples and the filtering threshold;
• and
• applying the filtering mask to the time domain samples to generate a filtered signal samples, wherein the filtering mask is configured to attenuate time domain samples that are above the filtering threshold.