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 PIM interference at a target receiver in a cellular network, the method comprising:
- determining a plurality of receivers in the cellular network that are separated from the target receiver by at least a minimum distance;
- receiving interference data over a time period from the plurality of receivers;
- determining correlations between interference detected by the plurality of receivers and the target receiver in the time period;
- determining at least one time slot in the time period in which the correlations exceed a predetermined value;
- applying the weighting factor to the at least one time slot;
- and
- 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.
A system for automatically detecting PIM interference at a target receiver in a cellular network, the system comprising at least one non-transitory computer readable medium with computer executable instructions stored thereon which, when executed by a processor, perform the following operations:
- determining a plurality of receivers in the cellular network that are separated from the target receiver by at least a minimum distance;
- receiving interference data over a time period from the plurality of receivers;
- determining correlations between interference detected by the plurality of receivers and the target receiver in the time period;
- determining at least one time slot in the time period in which the correlations exceed a predetermined value;
- applying the weighting factor to the at least one time slot;
- and
- 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.
Dependencies are inferred from the claim text.