AMPLE: An adaptive multiple path loss exponent radio propagation model considering environmental factors

We present AMPLE - a novel multiple path loss exponent (PLE) radio propagation model that can adapt to different environmental factors. In the proposed model, the scenario under consideration is classified into region types from a raster map, and each type of region is assigned with a PLE. The path loss is then computed based on a straight line between the transmitter (Tx) and receiver (Rx), which records the intersected regions and the weighted region path loss. To regress the model, those PLEs are extracted via measurement and the region map. We also verify the model in two suburban areas and compare with the 3GPP path loss model and the Alpha-Beta-Gamma (ABG) model. The results show that the AMPLE model outperforms the aforementioned models. To the best of our knowledge, this is the first time that a practical multi-slope model precisely maps PLEs and region types. Besides, this model can be integrated into map systems by creating a new path loss attribute for digital maps.