File:A comparison study of CDMA versus TDMA-FDMA LEO satellite systems (IA acomparisonstudy1094532142).pdf
Original file (1,275 × 1,650 pixels, file size: 1.96 MB, MIME type: application/pdf, 67 pages)
Captions
Captions
Summary[edit]
A comparison study of CDMA versus TDMA/FDMA LEO satellite systems
(   ) |
||
|---|---|---|
| Author |
Ciocco, Timothy Michael |
 |
| Title |
A comparison study of CDMA versus TDMA/FDMA LEO satellite systems |
|
| Publisher |
Monterey, California. Naval Postgraduate School |
|
| Description |
In this thesis, two LEO satellite systems with different multiple access schemes are analyzed. The first system, GLOBALSTAR, uses CDMA. Equations are developed to calculate the maximum capacity of one satellite, of one satellite's user beam, and of the entire GLOBALSTAR system over CONUS. A detailed description of GLOBALSTAR's outage probability, the probability that a call will be dropped from the system or blocked from connection with the system, is given and graphed against varying average call time and varying call arrival rate. The second system, IRIDIUM, uses TDMA/FDMA. Equations are similarly developed to calculate the maximum capacity of one satellite, of one satellite's user beam, and of the entire IRIDIUM system over CONUS. The probability of success or failure of an IRIDIUM subscriber obtaining a system channel is given by the Erlang Loss Formula and graphed against varying average call time and varying call arrival rate. Results show GLOBALSTAR provides five times the service capacity of IRIDIUM over CONUS and provides a better probability of obtaining a system channel for a call than will IRIDIUM. Subjects: |
|
| Language | English | |
| Publication date | March 1996 | |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
|
| Accession number |
acomparisonstudy1094532142 |
|
| Source | ||
| Permission (Reusing this file) |
Approved for public release, distribution unlimited | |
Licensing[edit]
|
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
|
 |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:51, 13 July 2020 |  | 1,275 × 1,650, 67 pages (1.96 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection acomparisonstudy1094532142 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #5247) |
You cannot overwrite this file.
File usage on Commons
The following page uses this file: