Application of Hybrid ARIMA and Artificial Neural Network Modelling for Electromagnetic Propagation: An Alternative to the Least Squares Method and ITU Recommendation P.1546-5 for Amazon Urbanized Cities

Table 3

RMSE values for ANN#2 and spread searched ANN tests.

Hybrid modelling	Radial 2	Radial 3	Radial 1
	RMSE (dB)	RMSE (dB)	RMSE (dB)
Original ARIMA-ANN#2	0.7227	1.0602	2.7523
Interpolated ARIMA-ANN#2	3.2126	7.1481	5.1963
Original ARIMA-spread-searched-ANN	0.7227	1.0602	2.7523
Interpolated ARIMA-spread-searched-ANN	3.2126	7.1481	5.1963