Pathloss Modelling of less dense urban area in Lagos State using Lee Model

In this study we aim to adopt a propagation model for a less dense urban area in Lagos state by examining one of the popular empirical path loss models for mobile communication. Lee’s model was compared with measured path loss obtain from the field measurement at GSM frequency of 900 MHz . TEMS Investigation tool was used for the drive test. The measurements of the received signal strength were collected through drive test with the aid of an Ericson test mobile system (TEMS). This was conducted around six base station of a mobile communication network at 900MHZ frequency band. The TEMS gives the received signal level at a spherical distance and the height of the mobile station is about 1.5m while the base station consists of heights of 30m and 32m. The width of the road is about 20m. The peak transmitter power is approximately 47dBm for all base station. Microsoft Excel spreadsheet application was used to open log files which has been exported from TEMS and saved as dot txt. We accomplish the investigation in variation in path loss between the measured (values gotten from field) and modeled values through MATLAB graph which was plotted. The average value was calculated between measured path loss values and the modeled values on basis of lee’s model for a less dense urban area. It was found out from the MATLAB analysis that site 3107-4877 was the closest with an average measured and model path loss of 124.9dBm and 122.4dBm respectively. Overall, this paper concludes that the path loss modeling and investigation over a less dense terrain, justifies that the Lee’s model has a best fit with experimentally measured data