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Whitepapers

Revealing and Analysing Modem Malware

May 24, 2012 12:00am PDT

Malware targeting broadband devices like ADSL modems, routers and wireless access points is very frequent in recent days. In this paper, the authors provide a formal description of modem malware...

Provided by: Masaryk University

Whitepapers

Network Coding Based Wideband Compressed Spectrum Sensing

May 24, 2012 12:00am PDT

One of the fundamental components in Cognitive Radios (CRs) is spectrum sensing. For sensing the wide range of frequency bands, CRs need high sampling rate Analog to Digital Converters (ADCs)...

Provided by: Carleton University

Whitepapers

An Accurate Model for Periodogram-Based Energy Detection Over Nakagami Fading

May 24, 2012 12:00am PDT

Spectrum sensing is a major function within a cognitive radio system, and it is recently shown that the frequency-domain implementation of the energy detector yields a lower probability of false...

Provided by: University of Malta

Whitepapers

Cyclostationarity-Based Low Complexity Wideband Spectrum Sensing Using Compressive Sampling

May 24, 2012 12:00am PDT

Detecting the presence of licensed users and avoiding interference to them is vital to the proper operation of a Cognitive Radio (CR) network. Operating in a wideband channel requires high Nyquist...

Provided by: University of Calgary

Whitepapers

Iterative Recovery Algorithms for Compressed Sensing of Wideband Block Sparse Spectrums

May 24, 2012 12:00am PDT

In a wireless communication environment, many of the Primary Users (PUs) do not use their licensed frequency bands at all times. The surveys show that the maximum frequency utilization of the...

Provided by: Carleton University

Whitepapers

Sampling Spectrum Occupancy Data Over Random Fields: A Matrix Completion Approach

May 24, 2012 12:00am PDT

The performance of cognitive radio networks is fundamentally determined by the availability of spectrum re-sources. Detailed measurement campaigns are needed to collect the spectrum occupancy data...

Provided by: University of Hong Kong

Whitepapers

Shadow Fading Correlations With Compressive Sensing: Prediction Accuracy

May 24, 2012 12:00am PDT

The cross-correlation between shadowing components in wireless communications has important implications for wireless systems. The new cooperative and cognitive communications methods can exploit...

Provided by: RWSoftware

Whitepapers

Delay-Power Tradeoff of Max Queue-Weighted (MWQ) Power Control for Wireless Systems With Limited Renewable Energy Storage

May 24, 2012 12:00am PDT

In this paper, the authors analyze the fundamental power-delay tradeoff in point-to-point wireless communication systems with renewable energy source. They consider the Max Queue-Weighted (MWQ)...

Provided by: Huawei Technologies

Whitepapers

Automatic Modulation Recognition for Spectrum Sensing Using Nonuniform Compressive Samples

May 24, 2012 12:00am PDT

The theory of Compressive Sensing (CS) has enabled the efficient acquisition of high-bandwidth (but sparse) signals via non-uniform low-rate sampling protocols. While most work in CS has focused...

Provided by: Colorado School of Mines

Whitepapers

Fast, Blind, and Joint Maximum Likelihood Estimation of MPSK Signal Parameters

May 24, 2012 12:00am PDT

Among the oldest and most fundamental topics in communication theory is blind signal parameter estimation, about which so much has been written, an exhaustive reference list is impossible. The...

Provided by: The AEgis Technologies Group

Whitepapers

3D Compressive Sensing for Nodes Localization in WNs Based On RSS

May 24, 2012 12:00am PDT

Compressive Sensing (CS) intends to recover signals at a sampling rate significantly (much) lower than that classically used according to the Nyquist theorem. This allows avoiding unnecessary...

Provided by: Universite de Sfax

Whitepapers

Power Line Network Topology Inference Using Frequency Domain Reflectometry

May 24, 2012 12:00am PDT

Frequency Domain Reflectometry (FDR) is a technique that was proposed for fault detection in Digital Subscriber Line (DSL) cables. In this paper, the authors describe how FDR can be used to...

Provided by: University of Bristol

Whitepapers

An Efficient Multiple Access Scheme for Voltage Control in Smart Grid Using WiMAX

May 24, 2012 12:00am PDT

An efficient WiMAX-based multiple access scheme for the state updating in voltage control is introduced. The scheme, called sample-contention scheme, addresses the problem of optimally bringing...

Provided by: University of Tehran

Whitepapers

On the Redundant Carrier Distribution for UW-OFDM

May 24, 2012 12:00am PDT

Unique Word (UW) OFDM is a new multicarrier technique that was first introduced in. In this technique, the guard interval is a part of the Inverse FFT (IFFT) output, and is filled with known...

Provided by: Ghent University

Whitepapers

Sub-Sampled OFDM Based Sub-Band Ultra-Wideband System

May 24, 2012 12:00am PDT

In Sub-band Ultra-WideBand (SUWB) systems, the use of spreading codes in conjunction with sub-banding enables energy efficient reduced sampling rate receiver designs. In this work, the Orthogonal...

Provided by: Chalmers University of Technology

Whitepapers

Measuring Biometric Sample Quality in Terms of Biometric Feature Information in Iris Images

May 22, 2012 12:00am PDT

This paper develops an approach to measure the information content in a biometric feature representation of iris images. In this paper, the biometric feature information is calculated using the...

Provided by: Hindawi Publishing

Blog Post

Use Contacts in Windows Phone 7 development

May 21, 2012 12:20pm PDT

Learn how to use Contacts when developing WP7 apps, and read about two approaches for using the data from this class.

Whitepapers

Channel Capacity Under General Nonuniform Sampling

May 18, 2012 12:00am PDT

This paper develops the fundamental capacity limits of a sampled analog channel under a sub-Nyquist sampling rate constraint. In particular, the authors derive the capacity of sampled analog...

Provided by: Stanford University

Whitepapers

Continuous Remote Monitoring in Hazardous Sites Using Sensor Technologies

May 18, 2012 12:00am PDT

The deployment of a distributed point source monitoring system based on wireless sensor networks in an industrial site where dangerous substances are produced, used, and stored is described. Seven...

Provided by: Hindawi Publishing

Whitepapers

Applying Computerized Digitizing Technique to Explore the POP Album Cover Historical Reflections

May 18, 2012 12:00am PDT

The purpose of this paper was to demonstrate the application of computerized digitizing process on exploring the historical reflection of the old pop album cover. Through digitizing technique, the...

Provided by: NORTH ATLANTIC UNIVERSITY UNION