Dominant Paths for the Field Strength Prediction
نویسندگان
چکیده
| An algorithm for the determination of the dominant paths for indoor wave propagation is presented. The algorithm computes a tree of the relations between the rooms inside the building and the branches of the tree are used for the determination of the dominant paths. Based on these dominant paths, three different prediction models are presented and compared with one another and with measurements. Two of the three models are based on neural networks, trained with measurements and the third model is an empirical model. With the neural prediction models a good generalization is achieved and they are very accurate in buildings not used for the training of the neural network.
منابع مشابه
Extensions to the field strength prediction technique based on dominant paths between transmitter and receiver in indoor wireless communications
Abstract | A new model for the field strength prediction for mobile communication networks inside buildings is presented in this paper. The model is based on the determination of the dominant paths between the transmitter and the receiver. The field strength is predicted with artificial neural networks, trained with measurements. In contrast to other neural prediction models a good generalizati...
متن کاملPrediction of rock strength parameters for an Iranian oil field using neuro-fuzzy method
Uniaxial compressive strength (UCS) and internal friction coefficient (µ) are the most important strength parameters of rock. They could be determined either by laboratory tests or from empirical correlations. The laboratory analysis sometimes is not possible for many reasons. On the other hand, Due to changes in rock compositions and properties, none of the correlations could be applied as an ...
متن کاملField Strength Prediction with Dominant Paths and Neural Networks for Indoor Mobile Communication
A new model for the eld strength prediction inside buildings is presented. In comparison to deterministic models it is independent of time{variant e ects. Dominant paths for the wave propagation are computed with a new algorithm and the eld strength is predicted with neural networks, trained with measurements in di erent buildings. Prediction results are presented and show a good agreement with...
متن کاملField Strength Prediction in Irregular Terrain – the PTP Model
This report describes a prediction technique for the calculation of the field strength of radio waves over irregular terrain paths. The concept of an "equivalent rounded obstacle" is used to account for radio propagation losses over various possible irregular terrain shapes, including shapes which cannot easily be described geometrically. The technique replaces an arbitrary terrain profile with...
متن کاملPrediction and measurement of delay spread, fading statistics, and receiving quality in indoor wireless networks
| A new model for the prediction of the field strength, the delay spread and the fast fading for mobile communication networks inside buildings is presented in this paper. In the first part of the paper, the equipment for the measurements is described. Some measurement results are shown to illustrate the performance of the measurement equipment. Based on the measurements a new parameter for the...
متن کامل