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There are different propagation models for LTE. By comparing different models the selection of a suitable radio propagation model for LTE is very important. The suitable radio propagation model is chosen by comparing the behaviour of the signal during transmission from transmitter to receiver. The behaviour of the signal during transmission depends on the path loss and the distance of transmitter and receiver. Suitable propagation model gives the relation between the path loss and the distance of transmitter and receiver. The model gives an idea of allowed path loss and the maximum cell range. There are different factors that can affect path loss like environmental conditions, frequency on which we are operating, condition of atmosphere and the distance between the transmitter and receiver.
RADIO PROPAGATION MODELS SUI Model Stanford University Interim (SUI) model is developed for IEEE 802.16 by Stanford University.
Okumura Model Okumura's model[4], [9] is one of the most widely used models for signal prediction. It can be used for frequencies in the range 150–1920 MHz ( it can be expanded up to 3000 MHz) [12] and distances between transmitter and receiver of 1–100 km. It can be used for base-station antenna heights ranging from 30–1000 m. while the receiver height can be 3 m to 10 m. This model is basic model for development of almost all other models. To determine path loss using Okumura's model, the free space path loss is first calculated. Median attenuation relative to free space (Amu) is added to it. Later correction factors according to the type of terrain are added to it. The path loss in model can be calculated as
There are different propagation models for LTE. By comparing different models the selection of a suitable radio propagation model for LTE is very important. The suitable radio propagation model is chosen by comparing the behaviour of the signal during transmission from transmitter to receiver. The behaviour of the signal during transmission depends on the path loss and the distance of transmitter and receiver. Suitable propagation model gives the relation between the path loss and the distance of transmitter and receiver. The model gives an idea of allowed path loss and the maximum cell range. There are different factors that can affect path loss like environmental conditions, frequency on which we are operating, condition of atmosphere and the distance between the transmitter and receiver.
And the different models take into case are
1. SUI model
2. okumura model
3. Cost – 231 Hata Propagation Model
4. Cost – 231 Walfisch – Ikegami Model
5. Ericsson 9999 Model
And we have to calculate path loss for different terrains of different models..and thus we can find the suitable propogation model for different terrains
