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*      RADIO-L :  a discussion of Digital Audio Broadcasting (DAB)    *
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Date: 18 December 1998
From: hendrik.prins@cemedia.com.au
Subject: Re: Request for sharing between DAB and FS

In response to Mr. Nattawut Ard-paru [who requested information on
sharing between DAB and Fixed Services, RADIO-L, 15 December 1998],
detailed technical studies are now under way in Australia as we plan
to introduce both terrestrial & satellite L band Digital Radio in the
same band currently occupied by thousands of fixed point to multi-point
and point to point links.

Clearly sharing can be very difficult, the question to be determined is
the geographic separation needed to protect the fixed services and the
Digital Radio services respectively. In each case this will depend in
the level of external interference that can be accepted by each system.
I expect that the results of this work will be presented to ITU Study
Groups 10 & 11 in due course. In fact the FS/ Satellite BSS[S] sharing
case is already the subject of an ITU Recommendation. The
FS/Terrestrial Digital Broadcasting will be much more difficult to
manage and Reccomendation s are yet to be formulated.

Hendrik Prins
Managing Director
CEMDIA Pty, Ltd.
Australia

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