Two Ray Ground Propagation Loss Model

[Kieran Lavelle]

I am trying to do some simulations using the above model with two nodes. I just have some things I can't figure out with it at all.

I have, a frequency = (3*10^8)//0.1 .  System loss of 1,   minDist of 0.5 and HeightAboveZ of 0.1

I have a few things I am trying to figure out, does the distance between nodes effect the likelihood of a reflected signal? And for everything else remaining constant when increasing the antenna height what effect should this have on the data? Increasing heightAboveZ from 0.1 to 0.15 seems to increase the likelihood of a signal being received. Why is this? I cant figure it out.

Thank you for any help, I just have a bit of a lack of understanding of the model, I have looked through the ns3 docs at it but it doesn't seem to have answered any of my questions. Many thanks in advance.

[Tommaso Pecorella]

Hi,

the formula is in the code, and it is consistent with the ones in https://en.wikipedia.org/wiki/Two-ray_ground-reflection_model

About the antennas heightAboveZ , yes, the higher the better:

   *                      (Ht * Ht) * (Hr * Hr)
   * rx = tx + 10 log10 (-----------------------)
   *                      (d * d * d * d) * L

Cheers,

T.