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Abstract-Indoor positioning is recognized as one of the upcoming major applications which can be used in wide variety of applications such as indoor navigation and enterprise asset tracking. The significance of localization in indoor environments have made the use of Wi-Fi based indoor positioning so that it can utilize available current wireless infrastructure and perform positioning very easily. In this paper we introduced a user friendly prototype for Wi-Fi based indoor positioning system where a user can identify its own position in indoor. Wi-Fi received signal strength (RSS) fluctuations over time introduce incorrect positioning. To minimize the fluctuation of RSS, we developed Particle Filters with the prototype. A comparison between with and without Particle Filter for error performance is presented and at the same time it is also noticed that variation in number of particles could change the positioning accuracy. Moreover comparison between calibration data in all directions and in one direction while constructing a radio map is presented.

a b s t r a c tThe task of simulation is often complicated, and naive users often look for relatively easier solutions. In many cases, simulations are done with no visual output which makes them non-attractive. In this paper, we present ViSim; a new simulation tool that has a userfriendly graphical interface. ViSim could be useful for researchers, students, teachers in their work, and for the demonstration of various wireless network scenarios on computer screens. It could make the task of simulation more exciting and enhance the interest of the users by avoiding the need to use a complex command-only text interface. ViSim is not a simulation engine, rather it calls ns-2 simulations in the background and makes the task easy for the users to visualize the simulation in a Windows environment. Though ViSim is mainly a simulation demonstration tool, any user with knowledge of ns-2 and Tcl scripting also has the provision to make the necessary modifications and rapid configuration for any other MANET routing scenario. Using our simulation tool, we measured the performances of several Mobile Ad-hoc Network (MANET) routing protocols. In this paper, we present the performance analysis of three prominent MANET routing protocols (DSDV, DSR and AODV) using our tool. Details of the various features of ViSim, brief descriptions of the selected routing protocols and their comparisons, and details about the experiments performed and the results obtained are presented in this work.

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