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Two-hop-relay architecture for next-generation WWAN/ WLAN integration
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Next-generation wireless systems (4G and beyond) are envisioned to provide ubiquitous high-speed access over heterogeneous radio technologies. The integration of cellular WWANs and WLANs has drawn considerable attention from the research and commercial

A 4th-Order Active-G_ m-RC Reconfigurable (UMTS/ WLAN ) Filter
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UMTS/ WLAN receiver of a reconfigurable terminal is presented. The filter uses the cascade of two Active--RC biquad cells. A single opamp is used for each biquad and its unity-gain- bandwidth is comparable to the filter cut-off frequency. Thus, the opamp power consumptionMany companies, organizations, and even individuals implement wireless local area networks (WLANs) in various locations such as their offices, conference rooms, homes, and business areas. This type of connection offers users portability because they can move from one location

Measurement and Simulation of the Energy Consumption of a WLAN Interface
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Technical University Berlin Telecommunications Networks Group Sekr. FT5-2 Einsteinufer 25 10587 Berlin Germany tel. [++49](30) 314 23833 fax. [++49](30) 314 23818 http://www-tkn.ee.tu-berlin.de {ebert, wolisz}@ee.tu-berlin.de Abstract The energy efficiency

Adaptive CSMA for Scalable Network Capacity in High-Density WLAN : A Hardware Prototyping Approach.
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Fast proliferation of 802.11 devices has led to the emergence of High-Density WLAN where 100s-1000s clients being serviced by 10s-100s of APs in a multi-cell environment. Scalable network capacity becomes a primary design challenge. In this paper, we investigate the

HORUS: A WLAN -based indoor location determination system
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Page 1. Horus: A WLAN -Based Indoor Location Determination System Moustafa Youssef 2003 H O R U S H O R U S Page 2. H O R U S H O R U S Motivation Ubiquitous computing is increasingly popular Requires Context information: location, time, Connectivity

Infrastructure-based location estimation in WLAN networks
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This paper focuses on fundamental system deployment aspects of location estimation in 802.11-based wireless networks. We concentrate on adaptable infrastructure-based approaches, where sniffers measure received signal strength from clients to locate them

Handover management architectures in integrated WLAN /cellular networks
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The integration of existing cellular systems with new wireless access technologies, such as wireless LANs, has attracted considerable attention during the past few years. The challenges to be addressed include authentication, security, QoS support, and mobility

Optimal Association of Stations and APs in an IEEE 802.11 WLAN
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We propose a maximum utility based formulation for the problem of optimal association of wireless stations (STAs) with access points (APs) in an IEEE 802.11 wireless local area network. Each STA can associate with one or more APs at different physical bit rates. Each

USIM based authentication test-bed for UMTS- WLAN handover
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Abstract? In view of mutual complementary feature of wide coverage and high data rate, the interworking between 3G cellular network and WLAN is a global trend of wireless communications.? In this paper, we analyze an authentication mechanism for 3GPPWLAN

Development and evaluation of a combined WLAN inertial indoor pedestrian positioning system
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In this paper we have presented an indoor positioning system for pedestrians combining Wireless LAN fingerprinting with foot mounted inertial and magnetometer sensors. To achieve a system capable of real-time processing we have employed a hierarchical

Indoor radio WLAN performance part II: Range performance in a dense office environment
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This paper discusses indoor WLAN DSSS radio range testing relating antenna type, radiated power, and transmitter/receiver separation to the IEEE 802.11 compliance range at the 2.4 GHz ISM band frequencies. Indoor range performance is shown to depend not only

Indoor and outdoor positioning in mobile environments a review and some investigations on wlan positioning
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This paper reviews existing indoor and outdoor positioning technologies for mobile users, including GPS and its extensions, wireless communication-networks and others. Accuracy and limitations of these technologies and methods are examined in more detail

Performance and accuracy test of the WLAN indoor positioning system ipos
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Location based-services and personal navigation require the location determination of a user not only in outdoor environments but also indoor. For indoor location already established wireless infrastructure such as WLAN (Wireless Local Area Networks) can be

A new UWB slot antenna with rejection of WiMax and WLAN bands
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Abstract- This paper presents a compact coplanar waveguide (CPW) fed ultra wideband (UWB) planar slot antenna with the characteristics of dual band rejection. The antenna consists of a rectangular slot with triangular tuning stub. The band notching of WiMax (3.2

3G and WLAN interworking security: Current status and key issues
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Abstract The third-generation (3G) mobile communication systems provide great coverage, complete subscriber management and nearly universal roaming. Nevertheless, 3G systems are subject to the low data rates (2Mbps highest for WCDMA). WLAN (Wireless Local Area

One-bit Time Reversal for WLAN Applications.
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Time reversal (TR) is a technique that can achieve remarkable temporal focusing (delay spread reduction) and spatial focusing (low spatial interference) in the context of wideband multiple/single input-single output systems. In this paper, we investigate a simplified form of

Experiments on Interference and Coexistence between Zigbee and WLAN Devices Operating in the 2.4 GHz ISM band
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As a ubiquitous network era is approaching, the demand for ubiquitous wearable computer terminals is higher to support diverse services. Many types of communication devices, such as WLAN , Zigbee, CDMA, and WiBro are expected to be integrated in a single wearable

Description of a MATLAB implementation of the indoor MIMO WLAN channel model proposed by the IEEE 802.11 TGn channel model special committee
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This document describes the content of the two MATLAB directories Correlation_Multiple_Cluster and Indoor. They contain MATLAB scripts that enable their user to Derive the spatial correlation properties of a Uniform Linear Array (ULA) with

Delay-centric handover in SCTP over WLAN
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In the field of personal mobile communications, it has been suggested that SCTP could provide a solution to the problems encountered by the currently implemented TCP/Mobile IP scheme. By exploiting SCTPs multihoming feature to connect to several separate wireless CSE PROJECTS

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