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Article #733Re: HOW DRM handles skywave propagation (digital radio mondiale)
From: Ratata
Date: Mon, 01 Oct 2007 18:42
Date: Mon, 01 Oct 2007 18:42
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SFTVratings_troy@yahoo.com wrote: > "To counter the effects of Doppler shift and Doppler spread the > frequency separation between the OFDM carriers in the DRM signal is > progressively increased (e.g. the carrier spacing in Mode D is more > than 2.5 times that in Mode A). This ensures that the frequency > spread experienced is kept to a sufficiently small fraction of the > carrier spacing to allow correct demodulation." better than IBOC ?? -- -- Shortwave transmissions in English, Francais, Nederlands, Deutsch, Suid-Afrikaans, Chinese, Dansk, Urdu, Cantonese, Greek, Spanish, Portuguese, ... http://shortwave.blogsite.org/ Updated every month or so ....
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X-Google-Thread: fb1f8,75377a07268430fc X-Google-Thread: 10a749,75377a07268430fc X-Google-Thread: 114aac,75377a07268430fc X-Google-Thread: f7d8a,2fbc1cad392d0236,start X-Google-Attributes: gidfb1f8,gid10a749,gid114aac,gidf7d8a,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!feeder.news-service.com!news.motzarella.org!motzarella.org!not-for-mail From: Ratata <no@mail.tanks> Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast Subject: Re: HOW DRM handles skywave propagation (digital radio mondiale) Followup-To: rec.audio.tech,rec.audio.car, rec.radio.shortwave, ba.broadcast Date: Mon, 01 Oct 2007 20:42:32 +0200 Organization: disorganised Lines: 19 Message-ID: <fdrf0l$tb8$1@registered.motzarella.org> References: <1191201354.812168.82840@19g2000hsx.googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit X-Trace: tomate.motzarella.org U2FsdGVkX1/GKYQG4MptIAMqrChj2ez0wGRXN8FUU2W2yMX/CzTuELRfxYbXH16m8a/GOSsBRtQ72KzZAfhOxgxHv4WZSXwUQ0zMpX4ACapEpW7F560lMJYplAgfA/cI08qKQDHobsfDkx2sXSyhRw== X-Complaints-To: Please send complaints to abuse@motzarella.org with full headers NNTP-Posting-Date: Mon, 1 Oct 2007 18:41:25 +0000 (UTC) X-Auth-Sender: U2FsdGVkX1/YtFSUqtjxrtt5FEbsvxd0zuB6PQuK1LlEFvh3IH8YcS8qlxvzj+m5 Cancel-Lock: sha1:iQEd8rczAaMmQEfQ3mWZoBFIS1U= User-Agent: KNode/0.10.5