By Essaïd Sabir, Hicham Medromi, Mohamed Sadik

ISBN-10: 9812879897

ISBN-13: 9789812879899

ISBN-10: 9812879900

ISBN-13: 9789812879905

This quantity publishes new developments and findings in sizzling subject matters concerning ubiquitous computing/networking. it's the final result of UNet - ainternational medical occasion that happened onSeptember 08-10, 2015, within the interesting urban of Casablanca, Morocco. UNet’15 is technically subsidized through IEEE Morocco part and IEEE COMSOC Morocco Chapter.

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    A peak detection correspond to the searched time difference value. The received signal at the ith base station can be written as: r [n] = A s[n − τ ] + n [n] Where A : signal amplitude. s[n − τ ] : delayed version of the sent signal s[n]. n [n] : propagation noise (additive white Gaussian noise). E. Mourabit et al. Considering that BS1 is the one actually the MS (Mobile Station) is connected to, so it has the shortest time of arrival then the received signals equations can be written as: r [n] = s[n] + n [n] (4) r [n] = A s[n − τ ] + n [n] (5) Where τ = τ − τ is the searched time difference of arrival between the two base stations and A is the amplitude ratio.

    Wi-Fi and Cell-ID based positioning - Protocols, Standards and Solutions 3. : UMTS positioning methods and accuracy in urban environments 4. : Network-Based Wireless Location: Challenges faced in developing techniques for accurate wireless location information. Signal Processing Magazine, 24–40. IEEE (2005) 5. : Positioning Technologies and Mechanisms for mobile Devices. Seminar Master Module SNET2 TU-Berlin 6. : Efficient uplink time difference of arrival mobile device localization in cellular networks.

    E. Mourabit et al. Proposed Hybrid Solution and Simulation Results The GPS is a very accurate positioning system but it suffers from the weakness of satellites signals which makes it difficult to receive it at dense urban environment with Non Line Of Sight, unlike UTDOA, the most accurate technique based on cellular network which signals can be received even in indoor areas. The Flow chart of the proposed technique as shown in fig. 3 has the possibility to locate a MS either with hybrid process or standalone UTDOA in case where the mobile phone cannot receive GPS signal (ex.

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    Advances in Ubiquitous Networking: Proceedings of the UNet’15 by Essaïd Sabir, Hicham Medromi, Mohamed Sadik

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