Mobile communication system
AssigneeNokia Technologies Oy
InventorToni Levanen
Life of this patent
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Abstract
An apparatus, method and computer program is described 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.
Claims19
An apparatus comprising:
- at least one processor;
- and
- at least one memory including computer program code, which when executed with the at least one processor, causes the apparatus to:
- obtain 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;
- determine an estimated power distribution for the time domain samples;
- determine 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;
- define a filtering mask based on the time domain samples and the filtering threshold value;
- and
- apply the filtering mask to the time domain samples to generate filtered signal samples, wherein the filtering mask is configured to attenuate time domain samples that are above the filtering threshold value, and wherein the filtering mask is configured to null the time domain samples that are above the filtering threshold value.
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 value;
- 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 value, and wherein the filtering mask is configured to null the time domain samples that are above the filtering threshold value.
A non-transitory computer-readable medium comprising instructions, when executed by an apparatus, cause the apparatus to perform at least the following:
- obtain 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;
- determine an estimated power distribution for the time domain samples;
- determine 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;
- define a filtering mask based on the time domain samples and the filtering threshold value;
- and
- apply the filtering mask to the time domain samples to generate filtered signal samples, wherein the filtering mask is configured to attenuate time domain samples that are above the filtering threshold value;
- and
- detect a Physical Random Access Channel preamble within the filtered radio frequency signal.
Dependencies are inferred from the claim text.