Webinar: Geolocate the Source of VSAT Interference with the Latest Release of satID

October 2017

Dave WilkinsonsatID Product Manager

Dave.Wilkinson@KratosDefense.com

Topics

• Locating TDMA interference

• Signal Cancellation to improve geolocation success

• Advanced Spectrum Analysis module

Housekeeping Items

• Audio - All attendees will be in listen only mode

• Q&A - Submit questions using the “Questions” panel and send it privately

• Presentation - A link to the recording of the webinar and the presentation will be sent out after the event

• Webinar Technical Support:

– +1 (844) 336-3191 (North America)

– +1 (503) 336-3191 (Outside North America)

– +44 (0) 1189 515 680 Option 2 (UK/EU Support)

– +61 (02) 9098 4383 (Australia/New Zealand)

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TDMA Geolocation

VSAT Interference Challenges

– Satellite Interference Reduction Group

93% of the satelliteindustry suffers the

effects of interference

Of all interference is due to VSAT systems

40%Of downtime caused by interference is due to VSAT systems

50-70%

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VSAT Interference Is IncreasingMore InterferenceIncidents

MoreTerminalsDeployed

SatelliteSensitivityIncreased

Lower HardwareCost

Cheaper Installers

1990 Today

PERFECT STORM:Small dishes x Cheaper labor x High volumes= INTERFERENCE INCIDENTS Over 100,000 Ku-band VSATs are installed

every year. Any one can cause serious interference.

Spot beams permit smaller/cheaper terminals. Frequency re-use, PCMA, CnC.

As volumes grow, hardware costs are now well below $1000 per terminal.

With hardware costs below $1000 per terminal, the affordable budget for installation services is very low!

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Monics: Carrier Monitoring and Mitigation SuiteThe industry’s most comprehensive suite of RF Management Solutions

Monics: Highly scalable carrier monitoring

satID: Most accurate geolocation

SigX: Automatically cancel interference

SatGuard: combat VSAT interference

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TDMA Geolocation in satID

What does it do?

• Makes possible the geolocation of one or more active VSAT terminals in a network and tag results by

specific terminal ID

Why is it important?

• Knowing the offending terminal ID rarely implies the physical location (knowing the registation plate of a

car doesn’t tell you where it is)

• Enables understanding of real world satellite user base

• Allows the policing of geographical restrictions

Why is it unique?

• Only solution on the market that geolocates VSAT terminals by resolving the terminal ID of each burst

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Optimized Workflow to Resolve VSAT Interference

SatGuard – identify terminal IDsReduce setup by using Monics database to help SatGuard identify terminal IDs

SatGuard – identify terminal IDsReduce setup by using Monics database to help SatGuard identify terminal IDs

SatGuard – identify terminal IDsReduce setup by using Monics database to help SatGuard identify terminal IDs

Monics – classify TDMA networks Define and save networks to identify channels causing interference

Monics – classify TDMA networks Define and save networks to identify channels causing interference

Monics – classify TDMA networks Define and save networks to identify channels causing interference

satID –geolocateinterferencePinpoint the location of VSAT terminals, not just by ID from SatGuard but by lat/long from satID

satID –geolocateinterferencePinpoint the location of VSAT terminals, not just by ID from SatGuard but by lat/long from satID

satID –geolocateinterferencePinpoint the location of VSAT terminals, not just by ID from SatGuard but by lat/long from satID

Complete VSAT Monitoring Suite

Classify Identify Locate

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Demonstration

Imagine the following scenario:

• Interference has been detected by Monics monitoring system

• Determined to be MF-TDMA from a neighboring satellite (ASI)

• SatGuard has been used to identify the terminal IDs causing interference– Sometimes this is sufficient

• Geolocation of terminals is needed– No access to network records or records are incomplete or out-of-date

– Need to provide additional details of which terminal IDs are casuing interference to third party operator

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Scenario Overview

TDMA Geolocation

The challenge:

• TDMA networks can be made up of hundreds (or thousands) of terminals. At times, many or only a few may have a need to transmit data

• The transmissions from an individual terminal are interleaved with the transmissions from many other terminals

• The transmissions from each terminal act as noise in the correlation process for locating every other terminal

• Burst transmissions are short duration, reducing frequency accuracy

Without the TDMA geolocation module, we could obtain a few results but these would not be associated with a terminal ID

(Note that this terminal is not transmitting at all within this timeframe)

TID: 232

TID: 218

TID: 191

TID: 121

TID: 078

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TDMA Geolocation

A single sample will capture varying amounts of power from each terminal ...

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Sample duration

TID 218: Relatively high SNR (due to more bursts)• more likely to correlate

TID 191: Relatively lower SNR (fewer bursts)• less likely to correlate

TID 078: Did not transmit during entire sample

duration (no bursts), so of course …

• will NOT correlate

Remember… without using the TDMA geolocation tool, the transmissions from each terminal act as noise in the correlation process for locating every other terminal

TDMA Geolocation

TDMA Geolocation is a simple 3-stage process

• Network Classification– Determine what type of network protocol is being used

– Can be skipped if classified

• Detect Terminals– Analyze the selected sample and determine the burst transmission plan for each terminal

• Geolocate Terminals– Perform geolocation on selected terminal(s) detected in the sample

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Locating VSAT terminals

TDMA Geolocation

TDMA Geolocation

• Can visualize the effects of the TDMA processing through the waterfall display tool

ID: 1756

ID: 791 ID: 1616

ID: 172513

Looking at the waterfalls

TDMA Geolocation

Recall:Burst transmissions are short duration, reducing frequency measurement accuracy

Use Result Averaging tool to refine results: improve accuracy and reduce ellipse size

• Combines results from multiple measurements to reduce effects of measurement errors

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Refining TDMA results

TDMA Geolocation

TDMA Geolocation can be exploited for more than just interference resolution

• Gain insight into the real satellite user base

– Use TDMA Geolocation to geographically profile entire networks

– Can facilitate better satellite planning in future

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Locating the network

Pin-point location of VSAT terminal causing interference

Gain more insight by profiling VSAT networks

TDMA Geolocation

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Signal Cancellation

Signal Cancellation

Blocking carriers on the secondary satellite can potentially prevent geolocation

• Reduces correlation SNR of the signal of interest

Signal cancellation effectively removes the blocking carrier and significantly improve correlation performance

*Real-Time Signal Cancellation using SigX

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Cancelling a signal for geolocation

Increase greatly the number of geolocation scenarios

Accelerate the time to result by significantly reducing processing time

Increase accuracy by reducing measurement errors

Signal Cancellation

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Advanced Spectrum Analysis Module

Modulation Analysis– Analyze signal information including center frequency, bandwidth, modulation type and

EsNo; critical for signal cancellation

Carrier under Carrier display– Visualize and accurately target low power interferers

Advanced Spectrum Analysis

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• Analyzer Threshold Trigger– Automatically start geolocation without human intervention based on a

threshold

– Optimize operations by saving time and manpower

User configured threshold

Trigger trace

Advanced Spectrum Analysis

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Spectrum Analysis: Enhance Geolocation Efforts

Automatically start geolocation without human intervention

Visualize and accurately target low power interferers

Gain more insight into spectrum with enhanced analysis

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Questions?

Thanks for your time.

Back up material

Thanks for your time.

satID – Supported TDMA Protocols

• Current– Gilat

• Sky Edge I

– Hughes• IPoS

– iDirect• Evolution• iNFINITI

– Viasat• Linkstar

• Planned– Gilat

• SkyEdge 2• SkyEdge 2C

– iDirect• Velocity

– Viasat• Linkway

– NewTec• 4CPM Sat3Play

– DVB-RCS– DVB-RCS2

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