By Topic

“Carfax”-a casualty of the eighties

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Sandell, R.S. ; Radio Spectrum Services, UK

The proposal for the service, which subsequently became known as “Carfax”, was put forward by BBC Research Department in 1971. It was based upon, an extensive review of the requirements, and the resources. Designed to use a single MF resources channel, operating in TDM, it envisaged a closely-spaced network of transmitters which would provide national cover. The operating technique was similar to that used for the maritime beacon service, whereby each station was allocated a brief period in a sequence to transmit its local announcement. Such a method is suited to the spasmodic nature of traffic information, whereby stations could be operated in a selected sequence either automatically or on demand, and simultaneous transmission by those within mutual interfering range would be prohibited. In the light of subsequent developments, the Carfax project can be seen as a unique opportunity which was missed. Even today, none of the methods in use achieves the spectrum efficient service that could have been realised, had it proceeded

Published in:

100 Years of Radio., Proceedings of the 1995 International Conference on

Date of Conference:

5-7 Sep 1995