Comparison between the Hata-Okumura and Parabolic Equation Models

Differences between the Hata-Okumura and parabolic equation models are exemplified in the prediction of shadowing.

Figure 1 and Figure 2 show the two prediction results (Hata-Okumura model and parabolic equation model):

Figure 1. Hata-Okumura model prediction.

Figure 2. Parabolic equation model prediction.

Figure 3 and Figure 4 show the height profile and the difference of the two prediction results

Figure 3. Height profile for the prediction.

Figure 4. Difference plot between the two models.

When looking at the difference plot with consideration of the height profile, the parabolic equation model accounts much better for shadowing effects as they occur in valleys. On the other hand, the Hata-Okumura model is too pessimistic in cases where both the transmitter and the receiver are located on hills.