Regression-based passive intermodulation detection methods

Abstract

A method and network node for regression-based passive intermodulation (PIM) detection methods are disclosed. According to one aspect, a method in a network node configured to communicate with wireless devices (WDs). The method includes, at each time of a plurality of successive times: determining a first difference between a downlink physical resource block (PRB) utilization at a present time and a downlink PRB utilization at a previous time, and determining a second difference between an uplink interference plus noise (IpN) power at the present time and an uplink IpN power at the previous time. The method also includes performing a regression analysis based at least in part on a first sequence of the first differences and a second sequence of the second differences to determine an association between downlink signals and uplink signals influenced by PIM.

Dependencies are inferred from the claim text.