Mobile Indoor Positioning System Based On WIFI Network Design And Implementation

Since GPS-weather, high-precision, automatic measurement, etc., in the military, transportation, mapping and other aspects of daily life are widely used. However, human activities largely or in the indoor-based, and accompanied by the gradual modernization process forward, people’s pursuit of artistic beauty substantial growth, innovative design, unique modern building concept gradually into people’s lives, such as the National Theatre, water Cube, the Bird’s Nest, etc. Most modern buildings such as large-scale, complex internal structure, how to achieve a large building in a complex indoor environments to provide location-based services, will be the positioning technology issues to be addressed.Thesis indoor positioning technology based on the principle, to study and propose design solutions based indoor positioning system WIFI mobile phone network, and also proposed an improved skewness-kurtosis positioning algorithm simulation test validated with a more high response speed and accuracy to meet the needs of the application. Mobile Indoor Positioning System papers build and easy to implement, without changing the wireless access point hardware, the use of indoor wireless AP signal so that users will be able to find the right path in the complex buildings. Therefore, with good promotional value.Firstly, studied composition machine indoor positioning system is a key technology. WIFI technology on the basic theory, as well as WIFI indoor positioning methods for analysis, combined with the impact of indoor positioning factors discussed indoor positioning system performance evaluation criteria; Secondly, according to the characteristics of indoor positioning, propagation model based positioning algorithm line study and propose an improved indoor positioning algorithm, the algorithm simultaneously positioning simulation; then study the handset indoor positioning system software design. Depending on the system design of the mobile phone WIFI network-based indoor positioning system architecture, and the wireless AP signal extraction and the establishment of the received signal strength database implementation method, as well as mobile client designs are described; Then, the paper studies the key technologies of the system implementation of wireless AP information extraction method, RSS access methods and the embedded Linux implementation WIFI communication are discussed in detail; final paper on the system were tested in order to verify the feasibility and correctness of the design.