An exact radio propagation model is important for coping up with new challenges in the field of communication like: appropriate design, deployment and service management strategies for any wireless network. Analysis of outdoor propagation models is important for the purpose of signal coverage prediction, data reception analysis of performance parameters like Rx Lev, Rx Qual, FER, BER, reception schemes, and analysis of signal attenuation under different environments and in the determination of the optimum location for the purpose of installation of base stations. The aim of this work is to carry out a comparative study of different outdoor propagation models with respect to empirical data collected from DIT University (formally Dehradun Institute of Technology), Dehradun by drive testing using TEMS Investigation tools at 1.8GHz. This study involves obtaining the mean received power distribution at specified receiver distance from the respective GSM base station. The measurement process was based on signal strength measurement and the study revealed that out of all the outdoor propagation models. Only COST Hata model, COST Hata W-B model and Ericsson model approximated the measurement characteristics and hence they can be deployed for network planning in this region. Measurement process of signal strength and data collection methodology also discuss in this paper.
An exact radio propagation model is important for coping up with new challenges in the field of communication like: appropriate design, deployment and service management strategies for any wireless network. Analysis of path loss for outdoor propagation models is important for the purpose of signal coverage prediction, data reception, reception schemes, and analysis of signal attenuation under different environments. The aim of this work is to survey different outdoor propagation models with respect to empirical data collected from DIT University (formally Dehradun Institute of Technology), Dehradun by drive testing using TEMS Investigation tools at 1.8GHz. Predication of path loss is based on obtaining the mean received power distribution at specified receiver distance from the respective GSM base station. The measurement process was based on signal strength measurement and the study revealed that out of all the outdoor propagation models. COST Hata model, COST Hata W-B model and Ericsson model approximated the measurement characteristics and hence they can be deployed for network planning in this region and select the best propagation model for that region. Measurement process of signal strength and data collection methodology also discuss in this paper.
Performance of current path attenuation prediction models encounters huge deviation from their true behavior when deployed for the locality apart from the one for which it had been proven for. This work deals with introducing the path loss on the basis of measured data and representation of the same in a different approach for the mentioned Fuzzy Inference system based analysis. The empirical data collection followed by curve-fitting for path loss evaluation on decibel scale with Normal random variable distribution for representing the shadow fading. Our paper introduces a new methodology for prediction of path loss for betterment in QoS via. Network planning specifically for mobility prone communication systems deploying fuzzy approach. The Transmission discontinuities encountered during propagation has been differentiated in to a variety of factors defined as fuzzy sets such as free space, flat terrain, low foliage terrain, high foliage terrain, and country side terrain. path loss exponent (n) has been applied for varied propagation profiles, Mamdani Fuzzy Inference has been deployed for prediction of "n" path loss exponent for any kind of scenario, which was obtained on the basis of set of symbolic rules that avails an approximation to the known propagation scenarios. Bertoni's model proposed by H.L. Bertoni's has been used for the present analysis.
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