www.gvf.org

Interference Mitigation & Prevention

Pro-Active and Re-Active Solutions

David HartshornSecretary General

GVF

www.gvf.org The Global VSAT Forum

• Non-Profit Satellite Industry Association

• Founded By International Industry in U.K. in 1997

• Consensus Established in Working Groups

• Nearly 200 Members Include All of the Major...

– Earth Station Manufacturers

– Satellite Operators

– Integrators, VARs, etc.

www.gvf.org The GVF Mission

• Facilitating Satcom Worldwide Thru:

– Market Promotions & Development (e.g. CSR, HA/DR)

– Regulatory, Policy, Spectrum Advocacy (WRC-15, 19)

– Training & Certification

– Earth Station Testing & Approvals (e.g. SOTM, VSAT, etc)

– Industry Benchmarking (e.g. for HTS Distributors)

– Supporting Collaborative Initiatives (e.g. with ESA)

www.gvf.org

4Gilat

The Objective

www.gvf.orgThe Reality

www.gvf.orgWhy is Interference Increasing?

www.gvf.orgCharacterizing Interference Types

Interference Types 6 Month Average

8%

47%

33%

7%

3%

2%0%

Adjacent Satellite Interference

Unauthorized Carrier

Cross-Pol/Copol

Sweeeper

Retransmit/FM Rebroadcast

Transponder Compression

All Others

Note: Percentages are based on Intelsat's experience but are indicative of hundreds of interference events experienced by the world’s satellite operators.

www.gvf.orgSatellite RFI: Breaking It Down

• Problems:

1. Improper Installations

2. Sub-Standard Equipment

3. Unidentified Carriers

4. Wireless Interference

5. Information Sharing

6. Disfunctional Networks

7. Skills Deficit

• Solutions:

Training & Certification Product Quality Assurance Carrier ID Spectrum Initiative SDA

Network Validation Benchmarking

www.gvf.orgInteractive Learning Example

www.gvf.orgHands-On and Supplementary Classes

www.gvf.orgGlobal Training Status

• More Than 10,000 Technicians Enrolled Worldwide

• Training Centres Established in Every Major World Region

• Multiple Languages Via 70+ Examiners and Instructors Worldwide

• Curriculum for SOTM, Auto-Deploy, Fixed VSAT, Maritime, etc.

www.gvf.orgSub-Standard Equipment Trends

• Increasing Attempts by Inexperienced Manufacturers to Try Production of Transmiting VSAT Antennas

• Designers often unaware of how accurately installers must align the antenna to prevent ASI and cross-pol interference

• Now, Auto-Deployand SOTM Is Being Added to the Mix

• Vacuum in Technical Know-How and Deployment of Systems That Spray Orbital Arc with Interference

www.gvf.orgThe Mutual Recognition Arrangement

• GVF 101-S• GVF 101• GVF 102• GVF 103• GVF 104• GVF 105

• Top-Level Procedure• The Foundation• Performance Spec Reference• Authorised Test Entities• Auto-Deploy Systems• Comms on the Move

• Established by Consensus of Operators & Manufacturers

• Launched in June 1999• Designed as Framework to Eliminate Redundancy • In 2007, Implemented for Out-Sourced Type Approvals

www.gvf.orgQuality Products Framework

• GVF Provides Outsourced Type Approvals

• Inmarsat, Intelsat, Eutelsat etc. Embrace the Solution

• GVF ‘Authorized Test Entities’ Available to…• Assist Antenna Manufacturers with Design• Conduct Type Approval Testing• Using Satellite Operator Specs• Provide Type Approval for Compliant Systems

• Underway: Collaboration with ESA on SOTM

www.gvf.orgIs VSAT Carrier ID Part of the Solution?

• GVF VSAT Group Launched in ’09:– Includes VSAT Manufacturers, Satellite Operators,

IRG, Detection Experts, Others– Scope & Principles Agreed– Technical Feasibility Established, but… – Fail-safe Getting More Traction

www.gvf.orgIMT/BWA in C-band Downlinks

Band commonly used by FSS satellitesAdditional band (FSS, feederlinks for MSS, …)

Future mobile phone networks(IMT Advanced, 4G, ….)Broadband Wireless Access

(BWA), WiMax, FWA, ….

Was considered at ITU WRC-07Is currently being introduced country by country worldwide

3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2Std. CEtx. C

www.gvf.orgAddressing Spectrum Proceedings

• GVF Coordinates WRC Spectrum Campaigns

• Wireless Industry Moving to Secure Ext. C-band

• Concerns Regarding Additional Interference

• Recent Activities:

• Sharing Studies• WRC-15 Decisions to Protect Satellite Spectrum• Other

www.gvf.orgAddressing Sub-Optimal Networks

• GVF Network Validation Service

• Team Evaluated VSAT Network in 27 Countries

• Findings: Most/All Facets of Interference-Mitigation Initiative Would Help Network Performance

• Report Submitted to Owner on How to Optimise Network and Prevent Interference

• Network Validation is Recent Addition to Interference-Prevention Initiative

www.gvf.org

Accredited Organizations• Enable European distributors to maintain well-trained staff 

through rigorous training relevant to their duties.• Provide capacity building for key business, technical areas• Promote use of type approved terminal equipment• Conduct periodic audits of industry companies to encourage

successful practice

Staff member title or function Minimum GVF training or certification

VSAT field technician/engineer GVF Advanced Satcom Professional CertificationSNG uplink technician GVF/RFI-EUI Advanced Technical Operator or

GVF/RFI-EUI Basic Technical OperatorMarine VSAT technician/engineer GVF Marine VSAT SpecialistSatellite systems or network engineer GVF 520 (Fundamentals of Satcom)Sales, Marketing, or Management of satellite communications products or services

GVF 500 (Introduction to Satellite Communications)

Operator of auto-point VSAT or uplink system

GVF/RFI-EUI Auto Point Operator Certification

Operator of Marine VSAT terminal GVF Marine VSAT Operator Certification

Underway: Benchmarking in EMEA

www.gvf.org

Thank You!

David.Hartshorn@gvf.org