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Cognitive Radio has now become a realistic option for the solution of the spectrum scarcity problem in wireless communication. TV channels (primary user) can be protected by accurate prediction of TV White Spaces (TVWS) by using propagation models. Knowledge of radio propagation is considered essential in any wireless network, with dependence on appropriate deployment and management strategies leading...
Currently, use of geo-location databases is the preferred method for detecting TV white spaces by white space devices in the United States of America. The approach protects TV transmitters and receivers from interference sufficiently by keeping a record of the TV transmitters' information, and relying on propagation models to determine the protection area of the TV transmitters. Thus accurate radio...
This paper describes a study on path loss variation in UHF/VHF bands in India from a root mean square error perspective. The aim of this study is to compare existing propagation path loss models in various parts of India. We calculate average root mean square error (RMSE) between measured path loss and those predicted by the existing path loss models. It is found that Perez-Vega and Zamanillo model...
Propagation models are useful tools for communication system planning and optimization of the radio spectrum which is a limited natural resource. An investigation on the suitable propagation model for Ilorin (8°30′N, 4°33′E), a sub-urban area in the Middle-belt of Nigeria is presented here. Experimental data consists of electric field strength obtained through drive test for two television transmitters...
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