Loading...
3 results
Search Results
Now showing 1 - 3 of 3
- Unified propagation model for Wi-Fi, UMTS and WiMAX planning in mixed scenariosPublication . Varela, Frederico; Sebastião, Pedro; Correia, Americo; Cercas, Francisco; Rodrigues, António; Velez, Fernando J.; Robalo, DanielThis paper presents an unified and empirical propagation model to obtain the received power in mixed scenarios, with outdoor and indoor environments, or in a scenario with only one kind of environment, either for an urban, sub-urban or rural scenario, with or without vegetation. This unified model is called the Lisbon University Institute (LUI) one and can be included into planning tools for wireless communication systems. The developed model is suitable for Path Loss prediction in mobile, as well as fixed wireless network systems, e.g., Wireless Fidelity, Universal Mobile Telecommunications System and Worldwide Interoperability for Microwave Access, considering Line-of-Sight or Non-Line-of-Sight propagation conditions.
- Validation of the unified propagation model for Wi-Fi, UMTS and WiMAX planningPublication . Varela, Frederico; Sebastião, Pedro; Correia, Americo; Cercas, Francisco; Rodrigues, Antonio; Velez, Fernando J.; Robalo, DanielThis paper presents the validation of the unified propagation model, the Lisbon University Institute (LUI) model, which is valid for three wireless technologies: Wireless Fidelity, Universal Mobile Telecommunications System and Worldwide Interoperability for Microwave Access. With this purpose in mind, several experimental trials for those technologies were performed in different scenarios, where mixed environments (outdoor and indoor) were included. This generalized and unified propagation model was tuned by adjusting specific parameters for each different technology, based on the achieved results from the field experiments.
- User capacity based planning tool for Wi-Fi and WiMAX networksPublication . Sebastião, Pedro; Velez, Fernando; Tomé, Ricardo; Costa, Rui; Robalo, Daniel; Grilo, António; Rodrigues, António; Cercas, FranciscoA simple wireless planning tool (WPT) is proposed, which facilitates the design and implementation of wireless fidelity (Wi-Fi), and worldwide microwave access (WiMAX) networks in indoor and outdoor environments. The tool gives to professional planners practical and useful information through quick procedures as the output is the number and position of the access points (APs), or an estimation of the total cost of implementation, based on data provided by different equipment manufacturers. It uses innovative algorithms for computing the best position of each AP. Carrier-to-noise and carrier-tointerference issues are discussed in detail, and a practical deployment of a single WiMAX cell in Covilhã is presented. There is a need of using sectorial antennas to guarantee an adequate coverage and interference mitigation.