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Sociedade Brasileira de Telecomunicações

Effect of Propagation Model Calibration on DCM Positioning Accuracy in a Dense Urban Area

In this paper the authors evaluate the effect of propagation model calibration on the positioning accuracy ob- tained by a database correlation method (DCM). The calibration procedure defines a single calibration factor. This factor is added to the predicted path loss to minimize the sum of the squared differences between predicted and measured received signal strength values. The selected DCM algorithm (RF-FING+RTD- PRED) employs a correlation database built using the Okumura- Hata empirical propagation model. Additional diffraction losses are calculated using Epstein-Peterson’s method applied upon digital elevation models with building heights with a planar resolution of 10 meters. The experimental evaluation was carried out in a GSM radio access network in a dense urban area.

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