SATLINK TOOL A TOOL FOR ANALYSING GEO SATCOM Authors: Ederson Ribas Machado and Anna Serra Font Supervisor: Laurent Franck Project 3 Space Communication Systems Master & 3rd year program at ISAE 26th March 2015

CONTENTS Introduction Link Budget Analysis LabVIEW App development overview Plan Graphical User Interface Final design Tabs functionalities Tests and results SATLINK Tool Demonstration Conclusions SATLINK Tool - MACHADO, SERRA

SATLINK Tool Introduction Objective: LINK BUDGET The global analysis of a GEO SATCOM depends on many different parameters: Position of satellite and Earth stations Environment Payload Digital link etc. LINK BUDGET Objective: Create a comprehensive tool in LabVIEW that offers the ability to test different satellite link and derive the end-to-end system performance. SATLINK Tool SATLINK Tool - MACHADO, SERRA

Link Budget Analysis Main Parameters 4 BER, Eb/No EIRP G/T 𝐶 𝑁 Accounting of loss and gains in the signal path. Main Parameters BER, Eb/No EIRP G/T 𝐶 𝑁 4 SATLINK Tool - MACHADO, SERRA

LabVIEW 5 Why is interesting to use this tool for link budget? Two solutions : calculating and interface Source: SatLinktool application© Source: SatLinktool Application© 5 SATLINK Tool - MACHADO, SERRA

App development overview Plan SATLINK Tool - MACHADO, SERRA

Graphical User Interface Final design of the GUI 1) Service 2) System Geometry 3) Uplink 4) Payload 5) Downlink 6) Overall link SATLINK Tool - MACHADO, SERRA

Tabs functionalities Service Run Press to show the Help pop-up Press to attach the corresponding files Enter the input parameters / drop down menus Results Control Buttons SATLINK Tool - MACHADO, SERRA

Tabs functionalities System Geometry SATLINK Tool - MACHADO, SERRA

Tabs functionalities Uplink SATLINK Tool - MACHADO, SERRA

Tabs functionalities Payload Mode indicator Enter with IBO Results Press to select tab SATLINK Tool - MACHADO, SERRA

Figures and diagrams to help the user Tabs functionalities Downlink Figures and diagrams to help the user SATLINK Tool - MACHADO, SERRA

Tabs functionalities Overall Link Help box Input (C/N)I SATLINK Tool - MACHADO, SERRA

Tests and Results Service/Uplink/Downlink/Payload - Antenna Use of “Satellite Communications Systems” book [1]. examples . Direct application of formulas. [sections: 5.4.2, 5.4.3 , 5.6.3., 5.6.4, 5.7.4,]. System Geometry Source: SatLinktool Application© Source: Eutelsat:www.eutelsat.com/deploy_SorbamLight/pages/azimuthElevation SATLINK Tool - MACHADO, SERRA [1] Maral, Gérald / Bousquet, Michel. Satellite Communication System.-5th ed. UK, 2009

Tests and Results Payload Antenna: Satellite – Earth station Geometry angles. β , α, β*, α*, θ, and ϕ (examples ref.[1]). SATLINK Tool - MACHADO, SERRA [1] Maral, Gérald / Bousquet, Michel. Satellite Communication System.-5th ed. UK, 2009

Tests and Results Payload Single Carrier Multi Carrier Transponder: Single and Multicarrier (3 Carriers/ Transponder). Direct application of the formulas, checked with Matlab scripts. Single Carrier Multi Carrier SATLINK Tool - MACHADO, SERRA [1] Maral, Gérald / Bousquet, Michel. Satellite Communication System.-5th ed. UK, 2009

SATLINK Tool Demonstration SATLINK Tool - MACHADO, SERRA

Conclusion Understanding Link Budget analysis Feasibility approach Integration Computing (LabVIEW, matlab, class theory) Improve skills: programming (labVIEW – loops , elements, not line of codes), Matlab, associating concepts seen in classes. Theory Further improvements Increase the possible values of BER Automate the process to take values of graphs Additional computing: Complete total depointing angle computation More options payload 18 SATLINK Tool - MACHADO, SERRA

Improvements 19 BER Payload models Automate Data acquisition Source: SatLinktool models© BER Source: Comets sat : http://www.wtec.org/loyola/satcom/c6_s2.htm Source: http://fas.org/spp/military/program/com/dscs_3.htm Payload models Source: From [FEN-95] – Eutelsat and CCIR Rep 720–2 Automate Data acquisition Total depointing angle 19 SATLINK Tool - MACHADO, SERRA

Thanks for your attention! Any questions? SATLINK Tool - MACHADO, SERRA