METHOD, COMPUTER PROGRAM AND CONTROLLER FOR DETECTING INTERFERENCE CAUSED BY INTER-MODULATION

A method of detecting interference caused by inter-modulation in a network node site comprising a set of network nodes for wireless communication capable of communication with a set of stations for wireless communication. The stations are wireless transceiver devices and communication from the network node to any of the stations is considered to be downlink communication and communication from any of the stations is considered to be uplink communication. The method comprises determining a received input signal interference level on at least a part of communication resources for uplink communication, determining a transmitted signal level on at least a part of communication resources for downlink communication, wherein the at least part of communication resources for downlink communication corresponds in time with the at least part of communication for uplink communication, correlating the determined received input signal interference level and the determined transmitted signal level at corresponding time instants to determine a correlation, and determining whether significant interference caused by inter-modulation is present based on the correlation. A computer program, a controller and a network node are also disclosed.