http://iet.metastore.ingenta.com
1887

Communications computing

More general concepts than this:

1-2 of 2 results

Filter by subject:

< Any subject

  • Electrical and electronic engineering [2]
  • Communications [2]
  • Telecommunication [2]
  • Radio links and equipment [2]
  • Satellite communication systems [2]
  • Radar and radionavigation [2]
  • Radionavigation and direction finding [2]
  • Computer and control engineering [2]
  • Computer applications [2]
  • Engineering computing [2]
  • See more See less

Filter by content type:

< Any content type

  • ConferencePaper [2]

Filter by publication date:

Filter by author:

< Any author

  • P.G. Mattos [2]
WAAS/EGNOS-ready 2-chip GPS chipset
Author(s): P.G. Mattos
Source: Fifth International Conference on Satellite Systems for Mobile Communications and Navigation, 1996, p. 24 - 27
Type: ConferencePaper
+ Show details - Hide details

The relentless climb in GPS volumes, and associated fall in prices, especially in the automotive market, mean that the OEM card or module is too expensive for the equipment builder to purchase, but gives inadequate profit margin for the OEM card supplier. Both the GPS company and the car electronics company need to reduce their costs. In the former case, the solution is a flexible, low component count, low cost chipset. In the case of the car electronics company, the solution is to embed a chipset on the motherboard, but this is a little more difficult as they seldom have the required expertise in RF technology and in GPS software. The chipset described solves all these problems as a single chip radio, single chip 3.3 V processor that includes 12-channel hardware correlators, ROM and RAM are all that are needed for a complete GPS receiver, and the radio application information, and GPS software are available under licence to all high volume system builders. Two of the twelve channels are configured to support either GPS or INMARSAT satellites (WAAS/EGNOS) PRN codes, allowing the system to support these services as soon as they open.

Add to favourites
Export citations
Software demodulation allows multi-standard terminals to cover sat-comms data, GPS and cellular without duplication
Author(s): P.G. Mattos
Source: IEE Colloquium on Evolving Technologies for Small Earth Station Hardware, 1995, p. 4 - 4
Type: ConferencePaper
+ Show details - Hide details

In 1989 SGS-Thomson and University of Bristol developed a combined GPS/INMARSAT-C terminal, under contract to INMARSAT, who wished to demonstrate the feasibility for the then imminent GMDSS and for fleet-control purposes for trucks. The work was an extension of a fully software GPS receiver design. Moving all the spread-spectrum processing and demodulation into software saved complex hardware, and led to flexibility, both in specification and in the use of the processor. The features of the processor that permitted this flexible use were high speed and high I/O bandwidth. The author discusses the use of this software modulation technique in the GPS, a GSM telephone system, and a generic radio receiver. (5 pages)

Add to favourites
Export citations
Items per page 20 | 50 | 100
Print this page
This is a required field
Please enter a valid email address