Improving positioning accuracy of location tracking system

This document presents a method for processing radio measurement reports in a location tracking apparatus, the method comprising: acquiring a plurality of radio measurement reports related to transmission of reference signals between a mobile tag being location-tracked and at least one location tracking node having a fixed location within a location tracking area, wherein each radio measurement report comprises a cycle index indicating a transmission cycle index of a reference signal associated with the radio measurement report and a radio measurement metric computed from said reference signal associated with the radio measurement report; combining radio measurement reports having the same transmission cycle index; and using the combined radio measurement reports in tracking the location of the mobile tag.