1 / 14

FIXED SATELLITE SERVICE and UAS (22 September 2010)

ACP WGF23/IP26 Abdolmajid Khalilzadeh. FIXED SATELLITE SERVICE and UAS (22 September 2010). COMMERCIAL SATELLITES. The FSS may be able to fulfill the UAS spectrum requirements without the need for a new AMS(R)S allocation

sawyer
Download Presentation

FIXED SATELLITE SERVICE and UAS (22 September 2010)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ACP WGF23/IP26 Abdolmajid Khalilzadeh FIXED SATELLITE SERVICE andUAS(22 September 2010)

  2. COMMERCIAL SATELLITES • The FSS may be able to fulfill the UAS spectrum requirements without the need for a new AMS(R)S allocation • Existing commercial FSS systems at Ku and Ka-band offer immediate access to spectrum for UAS • ITU-R studies have shown that the commercial Ku/Ka bands can support UAS control links and meet the desired UAS link availability.

  3. UAS OPERATING UNDER FSS • Requires modification of ITU Radio Regulations to permit UAS to communicate with a FSS satellite • Requires a WRC Resolution that contains the UAS technical and regulatory requirements • The performance, responsibilities and liabilities of the FSS and UAS operators would be specified in a commercial contract • UAS would not be operating under the AMS(R)S service allocation, but rather as an FSS application

  4. Non-Planned Ku Band FSS Frequencies • Space-to-Earth Direction 10.95 – 11.20 GHz 11.45 – 11.70 GHz 11.70 – 12.20 GHz (Region 2) 12.20 – 12.50 GHz (Region 3) 12.50 – 12.75 GHz (Regions 1 and 3) • Earth-to-Space Direction 14.00 – 14.50 GHz

  5. Non-Planned Ka Band FSS Frequencies • Space-to-Earth Direction 17.30 – 17.70 GHz (Region 1) 17.70 – 18.80 GHz 19.70 – 21.20 GHz • Earth-to-Space Direction 27.50 – 28.60 GHz 29.50 – 31.00 GHz

  6. SATELLITE CHARACTERISTICS • Long lifetime (≥ 15 years) • Low satellite and transponder failure rates • High EIRP and G/T levels over large geographic areas • Well suited for links that utilize small transmit/receive antennas • High radio link availability • Connectivity over large geographic areas, which terrestrial links cannot provide • Multiple transponders are available on each satellite, e.g. 24 Ku-band 36 MHz transponders • Bandwidths typically range from 24 to 120 MHz – the most common bandwidth being 36 MHz

  7. SATELLITE COVERAGE Uplink Coverage Downlink Coverage Note: This is an example coverage map; actual coverage varies depending on actual satellite design.

  8. COMMERCIAL SATELLITE CAPACITY • TRANSPONDER LEASING • Customer can lease all or portion of a transponder • Transponder can be leased on a non-premptible basis • Carrier cannot be moved to restore another carrier • BACK-UP CAPACITY • Due to large number of satellites and transponders, back-up (bandwidth) capacity can be provided. • Back-up capacity available on the same satellite • Back-up capacity available on another satellite

  9. LINK DEGRADATION • A satellite link can be degraded by two primary sources • Atmospheric effects • Adjacent satellite interference • Typical commercial satellite link availabilities range from 99.50% to 99.96%

  10. ADJACENT SATELLITE INTERFERNCE • A satellite link is subject to interference from the transmissions of other co-frequency satellite networks • Interference can occur in the Earth-to-space direction or in the space-to-Earth direction. • Adjacent satellite interference are managed through ITU coordination.

  11. SAT 1 SAT 2 SAT 3 2º±0.05º 2º±0.05º J I 1 2 C G D A B E F UA 4 3 H ES1 ES2 ES3 ADJACENT SATELLITE INTERFERNCE Note: 2º orbital separation is typical of the separation between adjacent satellites

  12. COORDINATION • Satellite operators coordinate the maximum power and EIRP density level of their transmissions, the off-axis gain characteristics of their antennas and the placement of any high power density carriers, e.g. TV/FM • A known and stable interference environment • Links are designed to withstand the expected interference • Internationally, coordination agreements are contained in a formal document that is approved by the involved satellite operators and their respective administrations • Domestically, a formal agreement may or may not be required – depends on the regulations of each administration

  13. ATMOSPHERIC DEGRADATION • Rain is the primary atmospheric source of link degradation at Ku and Ka-band frequencies • The effects of rain can be overcome in various ways • Increasing carrier power level • Changing the carrier modulation & FEC scheme • Increasing the transmitting and/or receiving antenna size • Typical commercial Ku-band link availabilities range from 99.50% to 99.96%

  14. UAS REDUNDANCY • At some point in time, links will degrade or drop-out for various reasons • UAS systems need to incorporate hardware redundancy • UAS systems need to incorporate spectrum redundancy • Capacity • Frequency

More Related