wi-fi

White Papers

Behavior of Quality Assessment Metrics Under Packet Losses on Wireless Networks

June 5, 2008 12:00am PDT

PSNR does not always rank quality of an image or video sequence in the same way that a human being. When evaluating coding proposals under specific distortion like compression or packet losses,...

Provided by: Polytechnic University

Image Gallery

Image Gallery: Nokia N82 S60 multimedia computer

June 4, 2008 12:33am PDT

The Nokia N82 continues to extend the line of Nseries devices with another innovation, the Xenon flash. The N82 has all the latest wireless connectivity options, with the exception of the North...

Q&A

wifi

June 3, 2008 11:38am PDT

wifi my wireless card keeps constantly trying to authenticate itself. I catch a signal for 2 seconds then the signal becomes unauthenticated then becomes idle then connects again to go through...

11 Started by joeblade@...  |  Latest comment by nepenthe0

Whitepapers

Connect Every K-12 Laptop... Wirelessly, Effortlessly, Securely

June 3, 2008 12:00am PDT

The increased use of laptop computers in K-12 schools has created a unique opportunity to dramatically improve the quality of teaching and learning. The integration of audio, video and graphics...

Provided by: Aruba Networks

White Papers

Multi-Node Cooperative Resource Allocation to Improve Coverage Area in Wireless Networks

June 3, 2008 12:00am PDT

It is of great importance for service providers to improve the coverage area without cost of more infrastructure in wireless networks especially in rural areas. Recently, cooperative communication...

Provided by: Institute of Electrical and Electronics Engineers

White Papers

On the Design of Space-Time Trellis Codes for Cooperative Relaying

June 3, 2008 12:00am PDT

The design of space-time codes for wireless communications with relays is investigated by considering a pragmatic approach based on the concatenation of convolutional codes and BPSK/QPSK...

Provided by: University of Bologna

White Papers

Performance Evaluation of Mobile WiMAX With Dynamic Overhead

June 2, 2008 12:00am PDT

Mobile WiMAX has become one of the 3rd Generation communication systems and its performance has been widely evaluated. The physical overhead is a critical factor that may affect the overall...

Provided by: Beijing University of Posts and Telecommunications

White Papers

WEP Cloaking for Legacy Encryption Protection

June 1, 2008 12:00am PDT

Motorola's WEP Cloaking module leverages the Motorola Wireless Intrusion Prevention System (WIPS) using wireless monitoring sensors to protect handheld devices, in use at thousands of retailers...

Provided by: Motorola

White Papers

Understanding Spectrum Intelligence

June 1, 2008 12:00am PDT

While many bands of the Radio Frequency (RF) spectrum have a dedicated purpose, Wi-Fi operates in an unlicensed band of RF spectrum carved out by the Federal Communications Commission (FCC), with...

Provided by: Cisco Systems

White Papers

The Case for an Untethered Enterprise

June 1, 2008 12:00am PDT

While once considered a luxury, Wi-Fi connectivity is now an integral part of the modern enterprise. To that end, most corporate IT administrators are expected to deploy wireless LANs. Until...

Provided by: Motorola

Case Studies

iFONE - First U.S. Army Deployment of Cellular Networks With Commercial Capabilities

June 1, 2008 12:00am PDT

iFONE, established by a former military officer and partner to provide cellular networks for the US Army's contingency operations, specializes in the deployment and provisioning of extremely...

Provided by: ADC

White Papers

Fixed-Mobile Convergence Performance Test Solution

June 1, 2008 12:00am PDT

The rapid proliferation of Wi-Fi connectivity along with universal demand for cellular voice and data services is driving consumer as well as enterprise demand for converged Wi-Fi/Cellular network...

Provided by: Azimuth Systems

White Papers

Distributed Event Tracking and Classification in Wireless Sensor Networks

June 1, 2008 12:00am PDT

In this paper a Distributed Event Localization, Tracking, and classification frAmework (DELTA) is presented. An event is observed and tracked by dynamically established groups. Relevant sensor...

Provided by: University of Bern

White Papers

Mesh Technology Enabling Ubiquitous Wireless Networks

June 1, 2008 12:00am PDT

Today's wireless networking technology provides high data rates. With IEEE 802.11n products, data rates beyond 500 Mb/s are soon feasible for Wireless Local Area Network (WLAN). Due to a...

Provided by: Association for Computing Machinery

White Papers

Data Bit-Rate Instability in Wireless Multi-Rate Ad Hoc Networks

June 1, 2008 12:00am PDT

Wireless Ad-hoc single-rate environments typically use a Distance Vector routing with a metric based on the minimization of the hop-count. In practice, the technique of minimizing the distance...

Provided by: Università degli Studi di Foggia

White Papers

WiMAX Networks: From Access to Service Platform

June 1, 2008 12:00am PDT

Recently, WiMAX has been proposed as an attractive wireless communication technology for providing broadband access for metropolitan areas. Despite its salient features from the technical...

Provided by: Institute of Electrical and Electronics Engineers

White Papers

A Comparative Analysis of Spectrum Alternatives for WiMAX Networks With Deployment Scenarios Based on the U.S. 700 MHz Band

June 1, 2008 12:00am PDT

The Mobile WiMAX Release 1.0 Profiles currently cover several frequency bands ranging from 2300 MHz to 3800 MHz. For comparison purposes these bands can be grouped into two categories, 2500 MHz...

Provided by: WiMAX Forum

White Papers

Optimal Channel-Aware ALOHA Protocol for Random Access in WLANs With Multipacket Reception and Decentralized Channel State Information

June 1, 2008 12:00am PDT

Perfect decentralized Channel State Information (CSI) is utilized to design an optimal distributed Medium Access Control (MAC) protocol for Wireless Local Area Networks (WLANs) with the...

Provided by: Institute of Electrical and Electronics Engineers

White Papers

The ANGEL IEEE 802.15.4 Enhancement Layer: Coupling Priority Queueing and Service Differentiation

June 1, 2008 12:00am PDT

The EU FP6 ANGEL project considers the usage of IEEE 802.15.4-based wireless sensor network technology in medical applications. Some key requirements found in this class of applications are not...

Provided by: Technische Universität Berlin

White Papers

Hardware and Software Solutions for Wireless Mesh Network Testbeds

June 1, 2008 12:00am PDT

Wireless mesh networks are currently emerging as a promising technology for broadband ubiquitous networking. Typical applications range from home broadband Internet access and community networking...

Provided by: Institute of Electrical and Electronics Engineers