Small Satellite Integrated Communication Environment (ICE)

Transcription

1 Small Satellite Integrated Cmmunicatin Envirnment (ICE) SmallSat Cnference 2017 SSC17-V-09_2017 Jhn Plschnitznig Sctt McLaughlin Dr. Frank Falc Patent 8,751, 064 B2

2 The Issue Prblem Hw can we imprve cmmunicatins with small satellites? SMALLSATs are tuted t be inexpensive Building NANOSATs has becme affrdable Launching yur satellite has becme affrdable Hwever, everyne frgets abut cmmunicatins The benefits f many small satellites will be lst with the inability t cmmunicate effectively with them Current Situatin Satellite cmmunicatins via dedicated dish antennas and assciated grund site hardware Cst: hardware and peratins Access: 1 satellite at a time, maybe 4 t 6 accesses every 24 hurs S, hw d yu handle 10, 100, satellites? Slutin Mdify existing cellular netwrk infrastructure t create an Integrated Cmmunicatin Envirnment (ICE) Leverage existing cellular phnes with mdificatins fr space cmmunicatins Add fixed, upward pinting antennas t selected cellular twers Riverside Research Labratries Patent 8,751, 064 B2 2

3 Slutin (Part 1): Satellite Phne (ICE Bx) Transmitter: Leverage Smartphne Technlgy Pwerful CPU, miniaturized, lightweight Select netwrk Based n anticipated prduct Cnstrains ICE Pac requirements Bandwidth Impacts Link Budget Cnstrains yur prduct Pwer is adjustable, nt limited by safety Ntinal ICE Bx Antenna Pattern Antenna: (Helical Cil Antenna) Cmpact and deplyable Antenna Pattern Gain and Beamwidth Satisfy Link Budget Ensures cntinuus access t twer Riverside Research Labratries Patent 8,751, 064 B2 3

4 Slutin (Part 2): Twer (ICE Dish) Individual twers Mdify with a fixed, upward-pinting dish antenna Dish size is frequency dependent Very lw side lbes, minimize interference Leverage existing twer infrastructure Its all in the numbers Single twer prvides limited cverage Many verlapping twers prvide glbal cverage Changing frequency, Antenna design, etc. Riverside Research Labratries Patent 8,751, 064 B2 4

5 Slutin (Part 3): Virtual Grund Site (ICE Tray) Operatins (ICE Tray) Satellite psitin is knwn Status f Health GPS Cell twers lcatins are knwn Cell twer access will dictate cntinuus cverage N need t establish cnnectin, shrten access prtcl Many satellites can by managed by each twer Multi-Sat Cell Twer Assignment Data (ICE Pacs) Uplink Dwnlink Cmmands (small messages) Status f Health Data (images, raw data, vide, etc.) Riverside Research Labratries Patent 8,751, 064 B2 5

6 Link Budget Analysis Can ICE achieve 90MB data dwnlink Analysis Elements with just a few cell twers? Hardware Netwrk, Platfrms, Radis, Antennas The Scenari/Gemetry - Can we receive the transmitted signal? Cmmunicatin Thrughput - Hw much data can we get dwn and hw fast? Riverside Research Labratries Patent 8,751, 064 B2 6

7 Analysis: Hardware GSM LTE Netwrk 1.9 GHz center frequency Channel Bandwidth (selected 5MHz, with ptential f 20 MHz) Mdulatin technique: 64 QAM (Quadrature Amplitude Mdulatin) Data rate: MHz Channel BW Satellite Cnfiguratin (ICE Bx) 300 km Transmitter Pwer is 3 Watts Helical Cil Antenna (17.9 dbi Peak Gain, 40 deg Half Pwer Beamwidth) Twer Cnfiguratin (ICE Dish) ** Ref Ftnte On the grund Parablic Dish Antenna (16 dbi Peak Gain, 22 deg Half Pwer Beamwidth) ** Frm Deplyable helical antennas fr cubesats 54 th AIAA/ASME/ASCE/AHS/ASC (AIAA ) Riverside Research Labratries Patent 8,751, 064 B2 7

8 Analysis: Link Budget (GWEC* Mdel) TRANSMITTER RECEIVER RECEIVE Twer TRANSMIT Freq (GHz) Transmit PA (W) Transmit Antenna Gain (dbi) Transmit Cable Lss Ttal (db) Transmit Cmbiner Lss (db) Bdy Lss (db) Vehicle Lss (db) Other: in building cverage (db) Slw fade margin (db) ******** Calculated ******** Transmit PA (dbm) Transmit EIRP (dbm) Transmit ERP (dbm) Transmit ERP (W) Effective Transmit Pwer (dbm) Phne 1.90 GHz 3.0 W 17.9 db 0.0 db 0.0 db 0.0 db 5.4 db 34.8 dbm 52.7 dbm W 47.3 dbm STK Cmms Mdeling Channel BW (khz) Ambient Temperature (deg F) RBS Gain (db) RBS Nise Figure (db) Cable Length (ft) Cable Lss per 100 ft (db/100-ft) TMA Gain TMA Nise Figure C/N (3% BER) (db) Receiver Diversity Gain (db) ******** Calculated ******** Receiver Antenna Gain (dbi) Ambient Temperature (deg C) Thermal Nise (Kelvin) Nise Flr (dbm) Nise Flr + RBS (dbm) Receiver Cable Lss (db) Effective Nise Flr n TMA khz 70 deg F 24.0 db 4.0 db 50.0 ft db 12.0 db 1.0 db 15.0 db 5.0 db 16.0 db 21 deg C K dbm dbm 0.4 db dbm System Nise Figure with TMA 5.0 db Effective Gain f using TMA -0.7 db Effective Nise Flr (dbm) dbm Bdy Lss (db) Vehicle Lss (db) Other: in building cverage (db) Min. Radi Input (dbm) dbm Effective Min. Input (dbm) dbm * Glbal Wireless Educatin Cnsrtium PATH LOSS Effective TX Pwer (dbm) Effective RCV Input (dbm) Max. Path Lss (db) Max. distance (km) Phne -> Twer 47.3 dbm dbm db km Riverside Research Labratries Patent 8,751, 064 B2 8

9 Analysis: Cmmunicatin Thrughput LTE Channel Bandwidth 5 MHz was a cnservative selectin fr the Data Rate thrughput calculatin 10 MHz was used t stress the receiver in the Link Budget calculatin Used numbers prvided by using 64 QAM Mdulatin Single Twer: MAX Channel Bandwidth: 5 Mhz Mdulatin: 64 QAM Bits per symbl: 6 Duratin per symbl: 71.4 u sec Subcarriers: 300 Data Rate: Mbps Cmms Duratin: 15 sec Data Rate (Mb): Mbits Data Thrughput (MB): MBytes 5 Twers: MAX Channel Bandwidth: 5 Mhz Mdulatin: 64 QAM Bits per symbl: 6 Duratin per symbl: 71.4 u sec Subcarriers: 300 Data Rate: Mbps Cmms Duratin: 76 sec Data Rate (Mb): Mbits Data Thrughput (MB): MBytes Riverside Research Labratries Patent 8,751, 064 B2 9

10 Analysis: Summary Calculatin Results (back f digital envelpe) Link Budget shws we have sustained link fr ~16 secnds per twer LTE cmms thrughput indicates we achieve ~47 MBytes per twer Cnclusin: Just tw twers achieve gal f 90MBytes! Recmmended Next Steps Phase 1 (Design, Build Prttype Cmms, Weather Balln) Riverside Research has experience with Weather Balln tests (Wilmingtn Airfield) Build ICE Bx and ICE Dish systems (wrk with AFRL, Deplyable helical cil antenna cncept) Cnfirm thrughput calculatins with cntrlled signal Subsequent tests will establish cmms Phase 2 (Space measurements) Either independent NANOSAT r ISS Package with 5 twers Establish Cmms Dwnlad cntrlled images (varying sizes dictate packets) Cnfirm cncept is peratinally sund Riverside Research Labratries Patent 8,751, 064 B2 10

11 Cnclusins ICE ffers a nvel apprach fr satellite cmmunicatins Leverages existing cellular technlgy and infrastructure ICE is a shift in the traditinal cmmunicatins paradigm Frm single-nde grund site, t a netwrk f antennas ICE is scalable with an increasing number f satellites Each satellite has its wn phne number Many satellites can pass thrugh a single nde N cmpetitin fr cmmunicatin access ICE increases Space Resiliency Offers a rbust and glbal cmmunicatin slutin ICE is nt Evlutinary, it s Revlutinary Puts satellite cmmunicatin in the hands f the peratr Riverside Research Labratries Patent 8,751, 064 B2 11

12 Questins? Jhn Plschnitznig Riverside Research The infrmatin furnished in this briefing is prprietary t Riverside Research, and therefre shall nt be duplicated, used, r disclsed fr any reasn withut the prir written apprval f Riverside Research.

13 Phase 1 (Weather Balln) Design/Build ntinal system t cnfirm Cmms Satellite: Cell Phne, Antenna, Sftware Twer: Grund statin, Dish, Sftware Gal: Cnfirm Link-Budget analysis and established cmms Weather balln measurement Wilmingtn Airfield Launch Balln and track thrugh cntrlled Twer Beam Calibrate signal n grund Track balln psitin and ICE Bx attitude t validate pwer fluctuatins Scale results t a space scenari (Phase 2) Riverside Research Labratries Patent 8,751, 064 B2 13

14 Phase 2 (G t space) Illinis 5 Twer Scenari Gather MSI data ver Lake Michigan and Chicag Wuld supprt EPA Algae-Blm tracking Demnstrate pst-cllectin dwnlink Riverside Research Labratries Patent 8,751, 064 B2 14