Keywords
PLC, BPL, dynamic notching interference
|
Introduction
This White Paper reproduces material produced for the
IEE Seminar on EMC and Broadband for the Last Mile,
held on 17 May 2005 at Savoy Place. It contains
three sections.
Part 1 reproduces the author’s
written paper, which also appears on pages 1/1-1/12
of the IEE
Seminar Digest,
IEE reference 05/11037, ISBN 0 86341 528 8.
Part 2 reproduces
the slides used in the author’s
presentation.
(Note that the audio files of the interference samples
used are available here.)
Part 3 reproduces the posters
that were displayed in the poster session.
(Note that these posters were also used for the
BBC R&D
Open Days 7-9 June 2005).
Abstract
Power Line Telecommunications (sending
data over mains wiring) unfortunately gives rise to unwanted
emissions
that can interfere with the operation of radio services,
currently predominantly those in the HF range used for
long-distance radio communication. Setting a simple emissions
limit is bound to fail: no level exists which could permit
PLT to operate while also protecting radio services.
PLT and radio services simply cannot operate at the same
time, in the same part of the spectrum, in the same place.
But
that does not mean that co-existence is impossible.
One possible solution is for the PLT system to avoid
using parts of the radio spectrum that are locally
occupied
by radio services. This paper discusses such a possibility,
including some experimental results that support its
feasibility. |
