A Review on Empirical data collection and analysis of Bertoni's model at 1. 8 GHz

Abstract

In any kind of network planning it is the central task to estimate and thus analyze propagation characteristics of a radio system through a medium in order to state accuracy in signal parameters for efficient network planning. The system must necessarily incorporate in itself the ability to predict the accurateness of radio propagation behavior. The site measurements each and every time are no doubt expensive & costly, so these models are a better alternative to that and even a lot less costly along with better suitability. Path loss thus is now a major consideration while laying down any network of base stations that can be used to estimate transmission requirements for a particular region thus offering better Quality of Service. Thus it is an important aspect to know the features of environment of operation of such a system along with the location of base station and mobile.

Path Loss Correction for Signal Propagation amongst Low Roof Top Buildings using Fuzzy Logic

“…path gain in to three subtle factors each accounting for free-space loss, diffraction loss due to edges etc. is depicted as physical approximation asFig.3 [2],: [Reduction in the field at the roof top just before the mobile due to propagation past previous rows of buildings given by a factor Q]. PG 2 = which accounts for the roof top field down to mobile i.e.…”

“…Both theoretical measurement based propagation models indicate that average received signal power decreases logarithmically with distance, whether in outdoor or indoor radio propagations. The average largescale path loss for an arbitrary Tx-Rx distance separation is made directly proportional to the distance by using a path loss exponent "n" as mentioned below: (2) Where 'n' denotes the path loss exponent, depicting the variability in the link loss with respect to the distance, d0 termed as reference distance and d referred as Tx-Rx separation [5]. Value of this exponent 'n' depends on fixed propagation scenario, as for free space n=2 and for discontinuities in the propagation path 'n' attains a larger value.…”