Free Book Online
Categories
Expected Performance of the Global Broadcast Service (GBS), Phase II, with Emphasis on Environmental Limitations to Supportable Data Rates

Pdf

Expected Performance of the Global Broadcast Service (GBS), Phase II, with Emphasis on Environmental Limitations to Supportable Data Rates

2.2 (1379)

Log in to rate this item

    Available in PDF Format | Expected Performance of the Global Broadcast Service (GBS), Phase II, with Emphasis on Environmental Limitations to Supportable Data Rates.pdf | Unknown
    Stephen D. Scotty
This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A115133. The abstract provided by the Pentagon follows: The US military requires a high capacity, high availability broadcast capability to provide timely dissemination of standard products to users who cannot rely on terrestrial links. The Global Broadcast Service (GBS) is being developed to meet this requirement. The key limiting factor in GBS availability is environmental losses, specifically atmospheric absorption and rainfall loss. The optimum frequency band for GBS would have been between 1-10 GHz. At this frequency range, environmental losses are negligible. However, congestion in this frequency range has forced DoD to choose a much higher frequency band for GBS, 20/30 GHz (K/Ka band). At this frequency band environmental losses, specifically rain loss, will be a key limiting factor to GBS availability. This thesis analyzes GBS Phase 2 performance taking into account atmospheric limitations. A key problem in determining the performance of GBS lies in the accuracy of existing rain loss models. Several rain loss prediction models were considered, and based on studies conducted by the ITU-R and Stanford Telecom, the USA rain model was chosen for this analysis. This thesis has shown that, due to environmental losses, high availability can best be achieved if GBS is capable of lowering its data rate during periods of precipitation.  
4.5 (7410)
  • Pdf

*An electronic version of a printed book that can be read on a computer or handheld device designed specifically for this purpose.

Formats for this Ebook

PDF
Required Software Any PDF Reader, Apple Preview
Supported Devices Windows PC/PocketPC, Mac OS, Linux OS, Apple iPhone/iPod Touch.
# of Devices Unlimited
Flowing Text / Pages Pages
Printable? Yes

Book details

  • PDF | 101 pages
  • Stephen D. Scotty
  • Storming Media
  • Unknown
  • 7
  • Other
Read online or download a free book: Expected Performance of the Global Broadcast Service (GBS), Phase II, with Emphasis on Environmental Limitations to Supportable Data Rates

Review Text

Name:
The message text:

Miscellanea