Analysis and Presentation Analysis and Presentation of Signal Jamming of Signal Jamming

EffectivenessEffectiveness

Brandon VargoBrandon Vargo

TJHSST Computer Systems TJHSST Computer Systems LaboratoryLaboratory

Northrop GrummanNorthrop Grumman

ObjectiveObjective

The purpose of this project is to allow a user to evaluate the effectiveness of signal jamming devices placed in a

particular region. Given the locations and characteristics of a set of signal

jammers in addition to data about the surrounding region, a user should be able to easily identify areas protected

by the jamming devices and non-protected areas.

What is Signal Jamming?What is Signal Jamming?

►The transmission of radio signals that The transmission of radio signals that interfere with other signals.interfere with other signals.

►Decrease in the signal to noise ratio of Decrease in the signal to noise ratio of the target signal.the target signal.

►Usually intentional.Usually intentional.

How Signal Jamming WorksHow Signal Jamming Works

►Signal to Jamming and Noise Ratio (SJNR)Signal to Jamming and Noise Ratio (SJNR)►From SJNR, calculate bit error rate and From SJNR, calculate bit error rate and

packet error rate (BER and PER). As the packet error rate (BER and PER). As the signal to noise ratio of the target signal signal to noise ratio of the target signal decreases, the error rates increase.decreases, the error rates increase.

► If the BER / PER are great enough, the If the BER / PER are great enough, the usefulness of the target signal is greatly usefulness of the target signal is greatly reduced or eliminated completely.reduced or eliminated completely.

Calculating Jamming Calculating Jamming EffectivenessEffectiveness

►Path loss algorithmPath loss algorithm Free space path lossFree space path loss Path loss exponent changes with terrain typePath loss exponent changes with terrain type

►Line of sightLine of sight Signals are attenuated or blocked by Signals are attenuated or blocked by

obstaclesobstacles►Calculate path loss and line of sight in the Calculate path loss and line of sight in the

worst case scenario for target worst case scenario for target transmitters and jammers.transmitters and jammers.

►Calculate SJNR, BER, and PER.Calculate SJNR, BER, and PER.

Elements of PresentationElements of Presentation

►Colored display overlaid on a 3D globe Colored display overlaid on a 3D globe indicates jamming effectiveness in the indicates jamming effectiveness in the worst-possible scenario.worst-possible scenario.

►Map contains points representing Map contains points representing jammer locations.jammer locations.

NASA World WindNASA World Wind

►Open source virtual globe created by Open source virtual globe created by NASA.NASA.

►Catalog system contains multiple Catalog system contains multiple datasets, each of which is contained datasets, each of which is contained within a separate data layer.within a separate data layer.

► Java SDK allows for easy extension and Java SDK allows for easy extension and integration by developers.integration by developers.

►Custom layers are easy to create and Custom layers are easy to create and overlay on top of the 3D globe.overlay on top of the 3D globe.

NASA World Wind – Globe NASA World Wind – Globe ViewView

NASA World Wind – 3D NASA World Wind – 3D TerrainTerrain

Eclipse Rich Client Platform Eclipse Rich Client Platform (RCP)(RCP)

►Development platformDevelopment platform Core PlatformCore Platform Standard Widget Toolkit (SWT)Standard Widget Toolkit (SWT) JFace – UI toolkit built on top of SWTJFace – UI toolkit built on top of SWT Eclipse workbenchEclipse workbench Equinox OSGi standard bundling frameworkEquinox OSGi standard bundling framework

►Applications consist of one or more Applications consist of one or more plugins and/or features that build on plugins and/or features that build on top of the Eclipse RCPtop of the Eclipse RCP

Eclipse Rich Client Platform Eclipse Rich Client Platform (RCP)(RCP)

►NASA World Wind already implemented as NASA World Wind already implemented as an Eclipse RCP plugin.an Eclipse RCP plugin.

►Signal jamming display is implemented as Signal jamming display is implemented as a plugin that uses features made available a plugin that uses features made available by existing plugins, including World Wind.by existing plugins, including World Wind. Code re-use / less custom codeCode re-use / less custom code Generic framework could allow other mapping Generic framework could allow other mapping

frameworks to be used instead of World Wind.frameworks to be used instead of World Wind. Future expansion flexabilityFuture expansion flexability