Enhanced passive intermodulation detection in wireless networks
AssigneeSpectrum Effect Inc.
InventorsDiego Ayala, Eamonn Gormley, David James Ryan, Charles Immendorf, Rekha Menon
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Abstract
Interference caused by passive intermodulation (PIM) can be automatically detected at receivers in a wireless telecommunications network, and the accuracy of PIM detection can be increased by de-weighting or ignoring time slots in which non-PIM interference is detected at a target receiver.
Claims13
A method of automatically detecting passive intermodulation (PIM) interference at a target receiver in a cellular network, the method comprising:
- receiving interference data over a time period for the target receiver;
- determining whether the received interference data has at least one non-PIM characteristic;
- applying a weighting factor to at least one time slot of the time period in which interference with the non-PIM characteristic is detected;
- determining whether PIM interference is present at the target receiver by analyzing interference at the target receiver over the time period with the at least one weighted time slot;
- receiving interference data over the time period for the plurality of receivers;
- determining correlations between interference detected by the plurality of receivers and the target receiver in the time period;
- determining a second time slot in the time period in which the correlations exceed a predetermined value;
- and
- determining a second weighting factor based on the correlations;
- wherein determining whether PIM interference is present in the second time slot includes applying the second weighting factor to the second time slot.
A system for automatically detecting passive intermodulation (PIM) interference at a target receiver in a cellular network, the system comprising:
- one or more processors;
- and
- memory storing instructions that, when executed by the one or more processors, cause the system to:
- receive interference data over a time period for the target receiver;
- determine whether the received interference data has at least one non-PIM characteristic;
- apply a weighting factor to at least one time slot of the time period in which interference with the non-PIM characteristic is detected;
- and
- determine whether PIM interference is present at the target receiver by analyzing interference at the target receiver over the time period with the at least one weighted time slot;
- receive interference data over the time period for the plurality of receivers;
- determine correlations between interference detected by the plurality of receivers and the target receiver in the time period;
- determine a second time slot in the time period in which the correlations exceed a predetermined value;
- and
- determine a second weighting factor based on the correlations, wherein determining whether PIM interference is present in the second time slot includes applying the second weighting factor to the second time slot.
Dependencies are inferred from the claim text.