|
|
|---|
| 168 |
return 0.0; |
168 |
return 0.0; |
| 169 |
} |
169 |
} |
| 170 |
|
170 |
|
| 171 |
double log_f = std::log (m_frequency / 1000000000) / 2.302; |
171 |
double frequency_MHz = m_frequency * 1e-6; |
| 172 |
double C_H = 0.8 + ((1.11 * log_f) - 0.7) * m_SSAntennaHeight - (1.56 * log_f); |
172 |
|
| 173 |
double log_BSH = std::log (m_BSAntennaHeight) / 2.303; |
173 |
double distance_km = distance * 1e-3; |
|
|
174 |
|
| 175 |
double C_H = 0.8 + ((1.11 * std::log10(frequency_MHz)) - 0.7) * m_SSAntennaHeight - (1.56 * std::log10(frequency_MHz)); |
| 174 |
|
176 |
|
| 175 |
// from the COST231 wiki entry |
177 |
// from the COST231 wiki entry |
| 176 |
// 2.303 is for the logarithm base change |
178 |
// 2.303 is for the logarithm base change |
| 177 |
|
179 |
|
| 178 |
double loss_in_db = 46.3 + (33.9 * log_f) - (13.82 * log_BSH) - C_H + ((44.9 - 6.55 * log_BSH) * std::log (distance) |
180 |
double loss_in_db = 46.3 + (33.9 * std::log10(frequency_MHz)) - (13.82 * std::log10 (m_BSAntennaHeight)) - C_H |
| 179 |
/ 2.303) + C + m_shadowing; |
181 |
+ ((44.9 - 6.55 * std::log10 (m_BSAntennaHeight)) * std::log10 (distance_km)) + C + m_shadowing; |
| 180 |
|
182 |
|
| 181 |
NS_LOG_DEBUG ("dist =" << distance << ", Path Loss = " << loss_in_db); |
183 |
NS_LOG_DEBUG ("dist =" << distance << ", Path Loss = " << loss_in_db); |
| 182 |
|
184 |
|