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October 1st 07, 07:42 PM
posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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HOW DRM handles skywave propagation (digital radio mondiale)
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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