The 1999 Third Generation
Mobile Phone auctions raised over £22 billion, ten times the
amount that was predicted. Five mobile phone companies bid for plots on
the radio spectrum to carry their new high bit rate services. The winning
bidders will be able to provide high-resolution video and multimedia services
on the move, such as mobile office services, virtual banking and on-line
billing, home shopping, video conferencing, on-line entertainment and
Internet access.
Since the radio spectrum is becoming increasing expensive, service providers
are anxious to make the most efficient use of their sections of the spectrum.
This means re-using frequencies as much as possible, but there is a limit
to how close transmitters can be placed to each other without interfering.
New services like MVDS and PCN (Personal Communications Networks) are
increasingly re-using 40 GHz transmissions in relatively close proximity.
This project aimed to gather data to help predict whether signals will
interfere over path lengths of 10 to 50 km, a typical distance for the
new services.
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