The correct answer is A. Determination of percentage of coverage area.
Path loss estimation is the process of determining the power loss that occurs as a signal travels from a transmitter to a receiver. There are many different path loss estimation techniques, each with its own advantages and disadvantages.
The Hata model is a statistical model that is based on empirical data collected from a variety of wireless networks. It is a simple and easy-to-use model that provides good results for most applications.
The log distance path loss model is a mathematical model that assumes that the path loss is proportional to the square of the distance between the transmitter and receiver. It is a more accurate model than the Hata model, but it is also more complex.
Log normal shadowing is a statistical model that accounts for the random variation in the path loss due to obstacles and other factors. It is a more accurate model than the Hata model and the log distance path loss model, but it is also more complex.
Determination of percentage of coverage area is not a practical path loss estimation technique. It is a simple and easy-to-use technique, but it is not very accurate. It is also not very useful for applications where the path loss needs to be known accurately.
In conclusion, the correct answer is A. Determination of percentage of coverage area.