Reduction of interference caused by downlink aggressors
OwnerMark Wyville, Pierre-Andre Laporteinventors
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Abstract
Methods and systems are described for reducing interference on radio units from passive intermodulation (PIM) distortion. Base station radio units can have multiple antennas, each receiving and sending communications over various frequencies. Embodiments under the present disclosure can identify the source of PIM and then reduce power of the aggressor downlink carriers on the impacted antennas. This can reduce the PIM that desensitizes the uplink receivers.
Claims32
A method performed by a radio unit for mitigating interference in an uplink channel of the radio unit, the method comprising:
- detecting an interference level in each one of a plurality of antenna branches of the radio unit;
- selecting one or more of the plurality of branches based on the detecting;
- identifying one or more uplink channels on the selected branches that are impacted by interference, based at least in part on the detected interference level, each of the one or more identified uplink channels being associated with one or more downlink carriers;
- and
- reducing downlink power on at least one of the one or more downlink carriers.
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Dependencies are inferred from the claim text.