Abstract—In this paper, the interaction of a planar inverted-F antennas array, mounted on a mobile handset, with a human hand-head phantom is investigated in the 1.9GHz band. The hybrid approach involving the particle swarm optimization (PSO) and Nelder-Mead (NM) algorithm is considered to optimize the complex excitations of the adaptive array elements in a mutual coupling environment for diffe...

In this paper, we propose an end-to-end network architecture based on Worldwide Interoperability for Microwave Access (WiMAX) over Ethernet Passive Optical Network (EPON) and present a security framework adopting both RSA and Extensible Authentication Protocol (EAP) authentication. We also introduce handover scenarios in the integrated network and propose corresponding handover schemes, for whi...

The integration of various cellular networks; wireless Local Area Networks, Worldwide interoperability for Microwave Access (WiMAX), Long Term Evolution (LTE), mobile ad-hoc networks and personal area networks utilizing all IP-based architecture constitutes 4G wireless networks. The mobile users roam across the boundaries of different access networks which gives rise to the requirement of effec...

Mobile Worldwide Interoperability for Microwave Access (Mobile WiMAX) is useful as next-generation wireless broadband access technology based on OFDMA. For it to proliferate, the radio interference between WiMAX, which is operated on the 2.3 GHz and 2.5 GHz bands, and WiFi/Bluetooth, which is located on the Industrial Scientific and Medical (ISM) band (2.4 GHz), needs to be resolved. Fujitsu ha...

Mobile Worldwide interoperability for Microwave access (WiMAX), IEEE 802.16e is a promising solution that provides ubiquitous wireless access with high data rates, high mobility and wide coverage. The main issue in mobile WiMAX networks is managing user mobility. Queues associated with the arriving packets should have enough bandwidth to meet the requirements; else the Handoff Call Dropping Pro...

The detection and tracking of moving objects (DATMO) in an outdoor environment from a mobile robot are difficult tasks because of the wide variety of dynamic objects. A reliable discrimination of mobile and static detections without any prior knowledge is often conditioned by a good position estimation obtained using Global Positionning System/Differential Global Positioning System (GPS/DGPS), ...

Loose coupling and tight coupling are two main interworking architectures have been proposed by European Telecommunication Standards Institute (ETSI) for integrating between the different types of technologies (3GPP, non-3GPP) such as Global System for Mobile Communication (GSM), Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunicati...

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Double perovskites, comprising two different cations, are potential nontoxic alternatives to lead halide perovskites. Here, we characterized thin films and crystals of Cs2AgBiBr6 by time-resolved microwave conductance (TRMC), which probes formation and decay of mobile charges upon pulsed irradiation. Optical excitation of films results in the formation of charges with a yield times mobility pro...

Two mechanisms have been proposed independently by IEEE and 3GPP; namely, Media Independent Handover (MIH) and Access Network Discovery and Selection Function (ANDSF), respectively. These mechanisms enable a seamless Vertical Handover (VHO) between the different types of technologies (3GPP and non-3GPP), such as GSM (Global System for Mobile Communication), Wireless Fidelity (WiFi), Worldwide I...