1 / 8

LOS Range/ Coverage

LOS Range/ Coverage. With the constant power radiated and noise power, the received signal power decrease with distance. So does the signal-to-noise power ratio, and the data rate per hertz, according to Shannon’s Law. P T = 1W G T = G R = 1 F = 2.5 GHz Temp = 10000 0

elainehall
Download Presentation

LOS Range/ Coverage

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. LOS Range/ Coverage

  2. With the constant power radiated and noise power, the received signal power decrease with distance. So does the signal-to-noise power ratio, and the data rate per hertz, according to Shannon’s Law. PT = 1W GT = GR= 1 F = 2.5 GHz Temp = 100000 Free space prop. (d-2) Data Rate Depends on Distance

  3. LOS area d h A B Line-of-sight Shadowed area of the Earth’s surface 2R Line-Of-Sight communication range d = SQRT[(R+h)^2 - R^2] (R ~ 6374 km LOS area = = 2*Pi*R^2*[h/(R+h)]

  4. Potential coverage area increases with altitude... GEO MEO LEO STRATO

  5. …but signal latency restrict interactive applications to low altitudes (terrestrial, stratospheric and LEO technologies) GEO LEO MEO STR The time required for a signal to travel from one point on a network to another.

  6. Higher altitudes require more power... M G L S Reference: 10m

  7. No. of stations to cover the Earth

  8. Altitude of stations • Terrestrial stations, alt. (1.5) 10-300m • Stratospheric stations, alt. 12-50 km (airplanes, balloons) • LEO - Low Earth Orbiting Satellites, alt. 150-1’500 km • MEO - Medium Earth Orbiting Satellites, alt. 5’000-10’000km • GEO - Geostationary Orbit Satellites, alt. ~36’000 km

More Related