Bug 1576

Reported by Kevin Macdonald <kmac@loxcel.com>:


This snippet is from the function OkumuraHataPropagationLossModel::GetLoss ()


         if (m_frequency < 200)
            {
              log_bHeight = 8.29 * pow (log10 (1.54 * hm), 2) -  1.1;
            }
          else
            {
              log_bHeight = 3.2 * pow (log10 (11.75 * hm), 2) - 4.97;
            }


The Okumura-Hata model does indeed switch at 200, but the units are
MEGAHERTZ and not HERTZ.

However, the units for m_frequency is HERTZ, and this is where the problem lies.


Instead, the if condition above should reference fmhz, which is
defined below, instead of m_frequency:

double fmhz = m_frequency / 1e6;


And here is how I think the code snippet above should appear:

         if (fmhz < 200)
            {
              log_bHeight = 8.29 * pow (log10 (1.54 * hm), 2) -  1.1;
            }
          else
            {
              log_bHeight = 3.2 * pow (log10 (11.75 * hm), 2) - 4.97;
            }