Simultaneous LTE Signal Propagation Modelling and Base Station Positioning Based on Multiple Virtual Locations.

Area of Science:

• Wireless communication
• Signal processing
• Geographic positioning systems

Background:

• Accurate positioning in Long Term Evolution (LTE) systems requires both Signal Propagation Models (SPM) and base station locations.
• Existing methods may require separate estimations or extensive data, impacting efficiency.

Purpose of the Study:

• To develop a technique for simultaneous estimation of SPM and base station locations in LTE systems.
• To utilize location-based Reference Signal Received Power (RSRP) data acquired within a limited service area.

Main Methods:

• Proposes setting multiple Virtual Locations (VLs) for a base station within the service area.
• Performs signal propagation modeling assuming the base station is at each VL and RSRP measurements are from that assumed location.
• Calculates residuals between estimated SPM outputs and RSRP measurements.
• Determines the base station's location and SPM by identifying the VL with the minimum sum of squared residuals.

Main Results:

• Successfully estimated the locations of seven base stations in an experimental area in Seoul.
• Achieved an average positioning accuracy of 40.2 meters for the base stations.

Conclusions:

• The proposed technique enables simultaneous and accurate estimation of both Signal Propagation Models and base station locations.
• This method offers a viable solution for improving positioning accuracy in LTE systems using readily available RSRP data.